From 080d0f83665fa686d7fe42dd57fb5975d0f1ca58 Mon Sep 17 00:00:00 2001 From: poma Date: Tue, 15 Dec 2020 18:08:37 +0300 Subject: [PATCH] initial --- .codecov.yml | 2 + .editorconfig | 9 + .env.example | 5 + .eslintrc | 27 + .gitattributes | 1 + .github/workflows/build.yml | 85 + .gitignore | 11 + .nvmrc | 1 + .prettierignore | 8 + .prettierrc | 16 + .solcover.js | 5 + .solhint.json | 13 + LICENSE | 22 + README.md | 24 + circuits/MerkleTree.circom | 71 + circuits/MerkleTreeUpdater.circom | 33 + circuits/Reward.circom | 150 + circuits/TreeUpdate.circom | 4 + circuits/Utils.circom | 25 + circuits/Withdraw.circom | 83 + compileHasher.js | 35 + contracts/Miner.sol | 314 + contracts/RewardSwap.sol | 95 + contracts/TornadoProxy.sol | 87 + contracts/TornadoTrees.sol | 132 + contracts/interfaces/IHasher.sol | 9 + contracts/interfaces/IRewardSwap.sol | 9 + contracts/interfaces/ITornadoInstance.sol | 17 + contracts/interfaces/ITornadoTrees.sol | 9 + contracts/interfaces/IVerifier.sol | 11 + contracts/mocks/MerkleTreeWithHistoryMock.sol | 18 + contracts/mocks/MinerMock.sol | 23 + contracts/mocks/RewardSwapMock.sol | 33 + contracts/mocks/TORNMock.sol | 5 + contracts/mocks/TornadoTreesMock.sol | 30 + contracts/utils/Echoer.sol | 11 + contracts/utils/FloatMath.sol | 710 ++ contracts/utils/MerkleTreeWithHistory.sol | 136 + contracts/utils/OwnableMerkleTree.sol | 17 + contracts/verifiers/RewardVerifier.sol | 1 + contracts/verifiers/TreeUpdateVerifier.sol | 1 + contracts/verifiers/WithdrawVerifier.sol | 1 + index.js | 6 + package.json | 62 + scripts/buildCircuit.sh | 8 + scripts/ganacheHelper.js | 55 + src/account.js | 39 + src/controller.js | 329 + src/note.js | 46 + src/utils.js | 165 + test/merkleTree.test.js | 107 + test/miner.test.js | 863 +++ test/rewardSwap.test.js | 190 + test/rewardSwap.tuning.test.js | 126 + test/tornadoTrees.test.js | 142 + truffle.js | 73 + yarn.lock | 6486 +++++++++++++++++ 57 files changed, 10996 insertions(+) create mode 100644 .codecov.yml create mode 100644 .editorconfig create mode 100644 .env.example create mode 100644 .eslintrc create mode 100644 .gitattributes create mode 100644 .github/workflows/build.yml create mode 100644 .gitignore create mode 100644 .nvmrc create mode 100644 .prettierignore create mode 100644 .prettierrc create mode 100644 .solcover.js create mode 100644 .solhint.json create mode 100644 LICENSE create mode 100644 README.md create mode 100644 circuits/MerkleTree.circom create mode 100644 circuits/MerkleTreeUpdater.circom create mode 100644 circuits/Reward.circom create mode 100644 circuits/TreeUpdate.circom create mode 100644 circuits/Utils.circom create mode 100644 circuits/Withdraw.circom create mode 100644 compileHasher.js create mode 100644 contracts/Miner.sol create mode 100644 contracts/RewardSwap.sol create mode 100644 contracts/TornadoProxy.sol create mode 100644 contracts/TornadoTrees.sol create mode 100644 contracts/interfaces/IHasher.sol create mode 100644 contracts/interfaces/IRewardSwap.sol create mode 100644 contracts/interfaces/ITornadoInstance.sol create mode 100644 contracts/interfaces/ITornadoTrees.sol create mode 100644 contracts/interfaces/IVerifier.sol create mode 100644 contracts/mocks/MerkleTreeWithHistoryMock.sol create mode 100644 contracts/mocks/MinerMock.sol create mode 100644 contracts/mocks/RewardSwapMock.sol create mode 100644 contracts/mocks/TORNMock.sol create mode 100644 contracts/mocks/TornadoTreesMock.sol create mode 100644 contracts/utils/Echoer.sol create mode 100644 contracts/utils/FloatMath.sol create mode 100644 contracts/utils/MerkleTreeWithHistory.sol create mode 100644 contracts/utils/OwnableMerkleTree.sol create mode 120000 contracts/verifiers/RewardVerifier.sol create mode 120000 contracts/verifiers/TreeUpdateVerifier.sol create mode 120000 contracts/verifiers/WithdrawVerifier.sol create mode 100644 index.js create mode 100644 package.json create mode 100755 scripts/buildCircuit.sh create mode 100644 scripts/ganacheHelper.js create mode 100644 src/account.js create mode 100644 src/controller.js create mode 100644 src/note.js create mode 100644 src/utils.js create mode 100644 test/merkleTree.test.js create mode 100644 test/miner.test.js create mode 100644 test/rewardSwap.test.js create mode 100644 test/rewardSwap.tuning.test.js create mode 100644 test/tornadoTrees.test.js create mode 100644 truffle.js create mode 100644 yarn.lock diff --git a/.codecov.yml b/.codecov.yml new file mode 100644 index 0000000..5866c80 --- /dev/null +++ b/.codecov.yml @@ -0,0 +1,2 @@ +coverage: + range: '100...100' diff --git a/.editorconfig b/.editorconfig new file mode 100644 index 0000000..c6c8b36 --- /dev/null +++ b/.editorconfig @@ -0,0 +1,9 @@ +root = true + +[*] +indent_style = space +indent_size = 2 +end_of_line = lf +charset = utf-8 +trim_trailing_whitespace = true +insert_final_newline = true diff --git a/.env.example b/.env.example new file mode 100644 index 0000000..b580f81 --- /dev/null +++ b/.env.example @@ -0,0 +1,5 @@ +MERKLE_TREE_HEIGHT=20 +PRIVATE_KEY= +INFURA_KEY=97c8bf358b9942a9853fab1ba93dc5b3 +TORN= +GOVERNANCE= diff --git a/.eslintrc b/.eslintrc new file mode 100644 index 0000000..911d315 --- /dev/null +++ b/.eslintrc @@ -0,0 +1,27 @@ +{ + "env": { + "node": true, + "browser": true, + "es6": true, + "mocha": true + }, + "extends": ["eslint:recommended", "plugin:prettier/recommended", "prettier"], + "globals": { + "Atomics": "readonly", + "SharedArrayBuffer": "readonly" + }, + "parser": "babel-eslint", + "parserOptions": { + "ecmaVersion": 2018 + }, + "rules": { + "indent": ["error", 2], + "linebreak-style": ["error", "unix"], + "quotes": ["error", "single"], + "semi": ["error", "never"], + "object-curly-spacing": ["error", "always"], + "comma-dangle": ["error", "always-multiline"], + "require-await": "error", + "prettier/prettier": ["error", { "printWidth": 110 }] + } +} diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..52031de --- /dev/null +++ b/.gitattributes @@ -0,0 +1 @@ +*.sol linguist-language=Solidity diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml new file mode 100644 index 0000000..e4dd23b --- /dev/null +++ b/.github/workflows/build.yml @@ -0,0 +1,85 @@ +name: build + +on: + push: + branches: ['*'] + tags: ['v[0-9]+.[0-9]+.[0-9]+'] + pull_request: + +jobs: + build: + runs-on: ubuntu-latest + steps: + - name: Checkout + uses: actions/checkout@v2 +# - uses: actions/setup-node@v1 +# with: +# node-version: 12 +# - run: yarn install +# # Disabled until the repo is public because of performance issues +# # - run: yarn test +# - run: yarn lint +# - name: Telegram Failure Notification +# uses: appleboy/telegram-action@0.0.7 +# if: failure() +# with: +# message: ❗ Build failed for [${{ github.repository }}](https://github.com/${{ github.repository }}/actions) because of ${{ github.actor }} +# format: markdown +# to: ${{ secrets.TELEGRAM_CHAT_ID }} +# token: ${{ secrets.TELEGRAM_BOT_TOKEN }} +# +# publish: +# runs-on: ubuntu-latest +# needs: build +# if: startsWith(github.ref, 'refs/tags') +# steps: +# - name: Checkout +# uses: actions/checkout@v2 +# +# - name: Install dependencies +# run: yarn install +# +# - name: NPM login +# # NPM doesn't understand env vars and needs auth file lol +# run: echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > ~/.npmrc +# env: +# NPM_TOKEN: ${{ secrets.NPM_TOKEN }} +# +# - name: Set vars +# id: vars +# run: | +# echo "::set-output name=version::$(echo ${GITHUB_REF#refs/tags/v})" +# echo "::set-output name=repo_name::$(echo ${GITHUB_REPOSITORY#*/})" +# +# - name: Check package.json version vs tag +# run: | +# [ ${{ steps.vars.outputs.version }} = $(grep '"version":' package.json | grep -o "[0-9.]*") ] || (echo "Git tag doesn't match version in package.json" && false) +# +# - name: Publish to npm +# run: npm publish +# +# - name: Create GitHub Release Draft +# uses: actions/create-release@v1 +# with: +# tag_name: ${{ github.ref }} +# release_name: Release ${{ steps.vars.outputs.version }} +# draft: true +# env: +# GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} +# +# - name: Telegram Notification +# uses: appleboy/telegram-action@0.0.7 +# with: +# message: 🚀 Published a [${{ steps.vars.outputs.repo_name }}](https://github.com/${{ github.repository }}) version [${{ steps.vars.outputs.version }}](https://hub.docker.com/repository/docker/${{ github.repository }}) to docker hub +# format: markdown +# to: ${{ secrets.TELEGRAM_CHAT_ID }} +# token: ${{ secrets.TELEGRAM_BOT_TOKEN }} +# +# - name: Telegram Failure Notification +# uses: appleboy/telegram-action@0.0.7 +# if: failure() +# with: +# message: ❗ Failed to publish [${{ steps.vars.outputs.repo_name }}](https://github.com/${{ github.repository }}/actions) because of ${{ env.GITHUB_ACTOR }} +# format: markdown +# to: ${{ secrets.TELEGRAM_CHAT_ID }} +# token: ${{ secrets.TELEGRAM_BOT_TOKEN }} diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..24074cc --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +node_modules +types +coverage +coverage.json +.secret +.infura +.DS_Store +build +circuits/*.json +circuits/*.bin +.env diff --git a/.nvmrc b/.nvmrc new file mode 100644 index 0000000..48082f7 --- /dev/null +++ b/.nvmrc @@ -0,0 +1 @@ +12 diff --git a/.prettierignore b/.prettierignore new file mode 100644 index 0000000..00c0ae1 --- /dev/null +++ b/.prettierignore @@ -0,0 +1,8 @@ +.vscode +build +circuits +scripts +contracts/RewardVerifier.sol +contracts/WithdrawVerifier.sol +contracts/TreeUpdateVerifier.sol +contracts/FloatMath.sol diff --git a/.prettierrc b/.prettierrc new file mode 100644 index 0000000..f532b1b --- /dev/null +++ b/.prettierrc @@ -0,0 +1,16 @@ +{ + "singleQuote": true, + "trailingComma": "all", + "bracketSpacing": true, + "semi": false, + "printWidth": 110, + "overrides": [ + { + "files": "*.sol", + "options": { + "singleQuote": false, + "printWidth": 130 + } + } + ] +} diff --git a/.solcover.js b/.solcover.js new file mode 100644 index 0000000..68517ba --- /dev/null +++ b/.solcover.js @@ -0,0 +1,5 @@ +module.exports = { + copyPackages: ['@openzeppelin/contracts'], + testrpcOptions: '-d --accounts 10 --port 8555', + skipFiles: ['Migrations.sol'], +} diff --git a/.solhint.json b/.solhint.json new file mode 100644 index 0000000..b313abe --- /dev/null +++ b/.solhint.json @@ -0,0 +1,13 @@ +{ + "extends": "solhint:recommended", + "rules": { + "prettier/prettier": [ + "error", + { + "printWidth": 110 + } + ], + "quotes": ["error", "double"] + }, + "plugins": ["prettier"] +} diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..bb98c92 --- /dev/null +++ b/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2018 Truffle + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/README.md b/README.md new file mode 100644 index 0000000..582f598 --- /dev/null +++ b/README.md @@ -0,0 +1,24 @@ +# Tornado.cash anonymity mining [![Build Status](https://github.com/tornadocash/tornado-anonymity-mining/workflows/build/badge.svg)](https://github.com/tornadocash/tornado-anonymity-mining/actions) + +## Dependencies + +1. node 12 +2. yarn +3. zkutil (`brew install rust && cargo install zkutil`) + +## Start + +```bash +$ yarn +$ cp .env.example .env +$ yarn circuit +$ yarn test +``` + +## Deploying + +Deploy to Kovan: + +```bash +$ yarn deploy:kovan +``` diff --git a/circuits/MerkleTree.circom b/circuits/MerkleTree.circom new file mode 100644 index 0000000..c508e18 --- /dev/null +++ b/circuits/MerkleTree.circom @@ -0,0 +1,71 @@ +include "../node_modules/circomlib/circuits/poseidon.circom"; +include "../node_modules/circomlib/circuits/bitify.circom"; + +// Computes Poseidon([left, right]) +template HashLeftRight() { + signal input left; + signal input right; + signal output hash; + + component hasher = Poseidon(2); + hasher.inputs[0] <== left; + hasher.inputs[1] <== right; + hash <== hasher.out; +} + +// if s == 0 returns [in[0], in[1]] +// if s == 1 returns [in[1], in[0]] +template DualMux() { + signal input in[2]; + signal input s; + signal output out[2]; + + s * (1 - s) === 0; + out[0] <== (in[1] - in[0])*s + in[0]; + out[1] <== (in[0] - in[1])*s + in[1]; +} + +// Verifies that merkle proof is correct for given merkle root and a leaf +// pathIndices input is an array of 0/1 selectors telling whether given pathElement is on the left or right side of merkle path +template RawMerkleTree(levels) { + signal input leaf; + signal input pathElements[levels]; + signal input pathIndices[levels]; + + signal output root; + + component selectors[levels]; + component hashers[levels]; + + for (var i = 0; i < levels; i++) { + selectors[i] = DualMux(); + selectors[i].in[0] <== i == 0 ? leaf : hashers[i - 1].hash; + selectors[i].in[1] <== pathElements[i]; + selectors[i].s <== pathIndices[i]; + + hashers[i] = HashLeftRight(); + hashers[i].left <== selectors[i].out[0]; + hashers[i].right <== selectors[i].out[1]; + } + + root <== hashers[levels - 1].hash; +} + +template MerkleTree(levels) { + signal input leaf; + signal input pathElements[levels]; + signal input pathIndices; + signal output root; + + component indexBits = Num2Bits(levels); + indexBits.in <== pathIndices; + + component tree = RawMerkleTree(levels) + tree.leaf <== leaf; + for (var i = 0; i < levels; i++) { + tree.pathIndices[i] <== indexBits.out[i]; + tree.pathElements[i] <== pathElements[i]; + } + + root <== tree.root +} diff --git a/circuits/MerkleTreeUpdater.circom b/circuits/MerkleTreeUpdater.circom new file mode 100644 index 0000000..eb8a83b --- /dev/null +++ b/circuits/MerkleTreeUpdater.circom @@ -0,0 +1,33 @@ +include "./MerkleTree.circom"; + +// inserts a leaf into a tree +// checks that tree previously contained zero in the same position +template MerkleTreeUpdater(levels, zeroLeaf) { + signal input oldRoot; + signal input newRoot; + signal input leaf; + signal input pathIndices; + signal private input pathElements[levels]; + + // Compute indexBits once for both trees + // Since Num2Bits is non deterministic, 2 duplicate calls to it cannot be + // optimized by circom compiler + component indexBits = Num2Bits(levels); + indexBits.in <== pathIndices; + + component treeBefore = RawMerkleTree(levels); + for(var i = 0; i < levels; i++) { + treeBefore.pathIndices[i] <== indexBits.out[i]; + treeBefore.pathElements[i] <== pathElements[i]; + } + treeBefore.leaf <== zeroLeaf; + treeBefore.root === oldRoot; + + component treeAfter = RawMerkleTree(levels); + for(var i = 0; i < levels; i++) { + treeAfter.pathIndices[i] <== indexBits.out[i]; + treeAfter.pathElements[i] <== pathElements[i]; + } + treeAfter.leaf <== leaf; + treeAfter.root === newRoot; +} diff --git a/circuits/Reward.circom b/circuits/Reward.circom new file mode 100644 index 0000000..6c63297 --- /dev/null +++ b/circuits/Reward.circom @@ -0,0 +1,150 @@ +include "../node_modules/circomlib/circuits/poseidon.circom"; +include "../node_modules/circomlib/circuits/bitify.circom"; +include "../node_modules/circomlib/circuits/comparators.circom"; +include "./Utils.circom"; +include "./MerkleTree.circom"; +include "./MerkleTreeUpdater.circom"; + +template Reward(levels, zeroLeaf) { + signal input rate; + signal input fee; + signal input instance; + signal input rewardNullifier; + signal input extDataHash; + + signal private input noteSecret; + signal private input noteNullifier; + + signal private input inputAmount; + signal private input inputSecret; + signal private input inputNullifier; + signal input inputRoot; + signal private input inputPathElements[levels]; + signal private input inputPathIndices; + signal input inputNullifierHash; + + signal private input outputAmount; + signal private input outputSecret; + signal private input outputNullifier; + signal input outputRoot; + signal input outputPathIndices; + signal private input outputPathElements[levels]; + signal input outputCommitment; + + signal private input depositBlock; + signal input depositRoot; + signal private input depositPathIndices; + signal private input depositPathElements[levels]; + + signal private input withdrawalBlock; + signal input withdrawalRoot; + signal private input withdrawalPathIndices; + signal private input withdrawalPathElements[levels]; + + // Check amount invariant + inputAmount + rate * (withdrawalBlock - depositBlock) === outputAmount + fee; + + // === check input and output accounts and block range === + // Check that amounts fit into 248 bits to prevent overflow + // Fee range is checked by the smart contract + // Technically block range check could be skipped because it can't be large enough + // negative number that `outputAmount` fits into 248 bits + component inputAmountCheck = Num2Bits(248); + component outputAmountCheck = Num2Bits(248); + component blockRangeCheck = Num2Bits(32); + inputAmountCheck.in <== inputAmount; + outputAmountCheck.in <== outputAmount; + blockRangeCheck.in <== withdrawalBlock - depositBlock; + + // Compute input commitment + component inputHasher = Poseidon(3); + inputHasher.inputs[0] <== inputAmount; + inputHasher.inputs[1] <== inputSecret; + inputHasher.inputs[2] <== inputNullifier; + + // Verify that input commitment exists in the tree + component inputTree = MerkleTree(levels); + inputTree.leaf <== inputHasher.out; + inputTree.pathIndices <== inputPathIndices; + for (var i = 0; i < levels; i++) { + inputTree.pathElements[i] <== inputPathElements[i]; + } + + // Check merkle proof only if amount is non-zero + component checkRoot = ForceEqualIfEnabled(); + checkRoot.in[0] <== inputRoot; + checkRoot.in[1] <== inputTree.root; + checkRoot.enabled <== inputAmount; + + // Verify input nullifier hash + component inputNullifierHasher = Poseidon(1); + inputNullifierHasher.inputs[0] <== inputNullifier; + inputNullifierHasher.out === inputNullifierHash; + + // Compute and verify output commitment + component outputHasher = Poseidon(3); + outputHasher.inputs[0] <== outputAmount; + outputHasher.inputs[1] <== outputSecret; + outputHasher.inputs[2] <== outputNullifier; + outputHasher.out === outputCommitment; + + // Update accounts tree with output account commitment + component accountTreeUpdater = MerkleTreeUpdater(levels, zeroLeaf); + accountTreeUpdater.oldRoot <== inputRoot; + accountTreeUpdater.newRoot <== outputRoot; + accountTreeUpdater.leaf <== outputCommitment; + accountTreeUpdater.pathIndices <== outputPathIndices; + for (var i = 0; i < levels; i++) { + accountTreeUpdater.pathElements[i] <== outputPathElements[i]; + } + + // === check deposit and withdrawal === + // Compute tornado.cash commitment and nullifier + component noteHasher = TornadoCommitmentHasher(); + noteHasher.nullifier <== noteNullifier; + noteHasher.secret <== noteSecret; + + // Compute deposit commitment + component depositHasher = Poseidon(3); + depositHasher.inputs[0] <== instance; + depositHasher.inputs[1] <== noteHasher.commitment; + depositHasher.inputs[2] <== depositBlock; + + // Verify that deposit commitment exists in the tree + component depositTree = MerkleTree(levels); + depositTree.leaf <== depositHasher.out; + depositTree.pathIndices <== depositPathIndices; + for (var i = 0; i < levels; i++) { + depositTree.pathElements[i] <== depositPathElements[i]; + } + depositTree.root === depositRoot; + + // Compute withdrawal commitment + component withdrawalHasher = Poseidon(3); + withdrawalHasher.inputs[0] <== instance; + withdrawalHasher.inputs[1] <== noteHasher.nullifierHash; + withdrawalHasher.inputs[2] <== withdrawalBlock; + + // Verify that withdrawal commitment exists in the tree + component withdrawalTree = MerkleTree(levels); + withdrawalTree.leaf <== withdrawalHasher.out; + withdrawalTree.pathIndices <== withdrawalPathIndices; + for (var i = 0; i < levels; i++) { + withdrawalTree.pathElements[i] <== withdrawalPathElements[i]; + } + withdrawalTree.root === withdrawalRoot; + + // Compute reward nullifier + component rewardNullifierHasher = Poseidon(1); + rewardNullifierHasher.inputs[0] <== noteNullifier; + rewardNullifierHasher.out === rewardNullifier; + + // Add hidden signals to make sure that tampering with recipient or fee will invalidate the snark proof + // Most likely it is not required, but it's better to stay on the safe side and it only takes 2 constraints + // Squares are used to prevent optimizer from removing those constraints + signal extDataHashSquare; + extDataHashSquare <== extDataHash * extDataHash; +} + +// zeroLeaf = keccak256("tornado") % FIELD_SIZE +component main = Reward(20, 21663839004416932945382355908790599225266501822907911457504978515578255421292); diff --git a/circuits/TreeUpdate.circom b/circuits/TreeUpdate.circom new file mode 100644 index 0000000..40fdecf --- /dev/null +++ b/circuits/TreeUpdate.circom @@ -0,0 +1,4 @@ +include "./MerkleTreeUpdater.circom"; + +// zeroLeaf = keccak256("tornado") % FIELD_SIZE +component main = MerkleTreeUpdater(20, 21663839004416932945382355908790599225266501822907911457504978515578255421292); diff --git a/circuits/Utils.circom b/circuits/Utils.circom new file mode 100644 index 0000000..1ceb5b0 --- /dev/null +++ b/circuits/Utils.circom @@ -0,0 +1,25 @@ +include "../node_modules/circomlib/circuits/bitify.circom"; +include "../node_modules/circomlib/circuits/pedersen.circom"; + +// computes Pedersen(nullifier + secret) +template TornadoCommitmentHasher() { + signal input nullifier; + signal input secret; + signal output commitment; + signal output nullifierHash; + + component commitmentHasher = Pedersen(496); + component nullifierHasher = Pedersen(248); + component nullifierBits = Num2Bits(248); + component secretBits = Num2Bits(248); + nullifierBits.in <== nullifier; + secretBits.in <== secret; + for (var i = 0; i < 248; i++) { + nullifierHasher.in[i] <== nullifierBits.out[i]; + commitmentHasher.in[i] <== nullifierBits.out[i]; + commitmentHasher.in[i + 248] <== secretBits.out[i]; + } + + commitment <== commitmentHasher.out[0]; + nullifierHash <== nullifierHasher.out[0]; +} diff --git a/circuits/Withdraw.circom b/circuits/Withdraw.circom new file mode 100644 index 0000000..f7810c6 --- /dev/null +++ b/circuits/Withdraw.circom @@ -0,0 +1,83 @@ +include "../node_modules/circomlib/circuits/poseidon.circom"; +include "../node_modules/circomlib/circuits/bitify.circom"; +include "./Utils.circom"; +include "./MerkleTree.circom"; +include "./MerkleTreeUpdater.circom"; + +template Withdraw(levels, zeroLeaf) { + // fee is included into the `amount` input + signal input amount; + signal input extDataHash; + + signal private input inputAmount; + signal private input inputSecret; + signal private input inputNullifier; + signal input inputRoot; + signal private input inputPathIndices; + signal private input inputPathElements[levels]; + signal input inputNullifierHash; + + signal private input outputAmount; + signal private input outputSecret; + signal private input outputNullifier; + signal input outputRoot; + signal input outputPathIndices; + signal private input outputPathElements[levels]; + signal input outputCommitment; + + // Verify amount invariant + inputAmount === outputAmount + amount; + + // Check that amounts fit into 248 bits to prevent overflow + // Amount range is checked by the smart contract + component inputAmountCheck = Num2Bits(248); + component outputAmountCheck = Num2Bits(248); + inputAmountCheck.in <== inputAmount; + outputAmountCheck.in <== outputAmount; + + // Compute input commitment + component inputHasher = Poseidon(3); + inputHasher.inputs[0] <== inputAmount; + inputHasher.inputs[1] <== inputSecret; + inputHasher.inputs[2] <== inputNullifier; + + // Verify that input commitment exists in the tree + component tree = MerkleTree(levels); + tree.leaf <== inputHasher.out; + tree.pathIndices <== inputPathIndices; + for (var i = 0; i < levels; i++) { + tree.pathElements[i] <== inputPathElements[i]; + } + tree.root === inputRoot; + + // Verify input nullifier hash + component nullifierHasher = Poseidon(1); + nullifierHasher.inputs[0] <== inputNullifier; + nullifierHasher.out === inputNullifierHash; + + // Compute and verify output commitment + component outputHasher = Poseidon(3); + outputHasher.inputs[0] <== outputAmount; + outputHasher.inputs[1] <== outputSecret; + outputHasher.inputs[2] <== outputNullifier; + outputHasher.out === outputCommitment; + + // Update accounts tree with output account commitment + component treeUpdater = MerkleTreeUpdater(levels, zeroLeaf); + treeUpdater.oldRoot <== inputRoot; + treeUpdater.newRoot <== outputRoot; + treeUpdater.leaf <== outputCommitment; + treeUpdater.pathIndices <== outputPathIndices; + for (var i = 0; i < levels; i++) { + treeUpdater.pathElements[i] <== outputPathElements[i]; + } + + // Add hidden signals to make sure that tampering with recipient or fee will invalidate the snark proof + // Most likely it is not required, but it's better to stay on the safe side and it only takes 2 constraints + // Squares are used to prevent optimizer from removing those constraints + signal extDataHashSquare; + extDataHashSquare <== extDataHash * extDataHash; +} + +// zeroLeaf = keccak256("tornado") % FIELD_SIZE +component main = Withdraw(20, 21663839004416932945382355908790599225266501822907911457504978515578255421292); diff --git a/compileHasher.js b/compileHasher.js new file mode 100644 index 0000000..e679e21 --- /dev/null +++ b/compileHasher.js @@ -0,0 +1,35 @@ +// Generates Hasher artifact at compile-time using Truffle's external compiler +// mechanism +const path = require('path') +const fs = require('fs') +const genContract = require('circomlib/src/poseidon_gencontract.js') + +// where Truffle will expect to find the results of the external compiler +// command +const outputPath = path.join(__dirname, 'build', 'contracts') +const outputPath2 = path.join(outputPath, 'Hasher2.json') +const outputPath3 = path.join(outputPath, 'Hasher3.json') + +if (!fs.existsSync(outputPath)) { + fs.mkdirSync(outputPath, { recursive: true }) +} + +function main() { + const contract2 = { + contractName: 'Hasher2', + abi: genContract.generateABI(2), + bytecode: genContract.createCode(2), + } + + fs.writeFileSync(outputPath2, JSON.stringify(contract2, null, 2)) + + const contract3 = { + contractName: 'Hasher3', + abi: genContract.generateABI(3), + bytecode: genContract.createCode(3), + } + + fs.writeFileSync(outputPath3, JSON.stringify(contract3, null, 2)) +} + +main() diff --git a/contracts/Miner.sol b/contracts/Miner.sol new file mode 100644 index 0000000..0a74d22 --- /dev/null +++ b/contracts/Miner.sol @@ -0,0 +1,314 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +pragma experimental ABIEncoderV2; + +import "./interfaces/IVerifier.sol"; +import "./interfaces/IRewardSwap.sol"; +import "./TornadoTrees.sol"; +import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; +import "@openzeppelin/contracts/math/SafeMath.sol"; +import "torn-token/contracts/ENS.sol"; + +contract Miner is EnsResolve { + using SafeMath for uint256; + + IVerifier public rewardVerifier; + IVerifier public withdrawVerifier; + IVerifier public treeUpdateVerifier; + IRewardSwap public immutable rewardSwap; + address public immutable governance; + TornadoTrees public tornadoTrees; + + mapping(bytes32 => bool) public accountNullifiers; + mapping(bytes32 => bool) public rewardNullifiers; + mapping(address => uint256) public rates; + + uint256 public accountCount; + uint256 public constant ACCOUNT_ROOT_HISTORY_SIZE = 100; + bytes32[ACCOUNT_ROOT_HISTORY_SIZE] public accountRoots; + + event NewAccount(bytes32 commitment, bytes32 nullifier, bytes encryptedAccount, uint256 index); + event RateChanged(address instance, uint256 value); + event VerifiersUpdated(address reward, address withdraw, address treeUpdate); + + struct TreeUpdateArgs { + bytes32 oldRoot; + bytes32 newRoot; + bytes32 leaf; + uint256 pathIndices; + } + + struct AccountUpdate { + bytes32 inputRoot; + bytes32 inputNullifierHash; + bytes32 outputRoot; + uint256 outputPathIndices; + bytes32 outputCommitment; + } + + struct RewardExtData { + address relayer; + bytes encryptedAccount; + } + + struct RewardArgs { + uint256 rate; + uint256 fee; + address instance; + bytes32 rewardNullifier; + bytes32 extDataHash; + bytes32 depositRoot; + bytes32 withdrawalRoot; + RewardExtData extData; + AccountUpdate account; + } + + struct WithdrawExtData { + uint256 fee; + address recipient; + address relayer; + bytes encryptedAccount; + } + + struct WithdrawArgs { + uint256 amount; + bytes32 extDataHash; + WithdrawExtData extData; + AccountUpdate account; + } + + struct Rate { + bytes32 instance; + uint256 value; + } + + modifier onlyGovernance() { + require(msg.sender == governance, "Only governance can perform this action"); + _; + } + + constructor( + bytes32 _rewardSwap, + bytes32 _governance, + bytes32 _tornadoTrees, + bytes32[3] memory _verifiers, + bytes32 _accountRoot, + Rate[] memory _rates + ) public { + rewardSwap = IRewardSwap(resolve(_rewardSwap)); + governance = resolve(_governance); + tornadoTrees = TornadoTrees(resolve(_tornadoTrees)); + + // insert empty tree root without incrementing accountCount counter + accountRoots[0] = _accountRoot; + + _setRates(_rates); + // prettier-ignore + _setVerifiers([ + IVerifier(resolve(_verifiers[0])), + IVerifier(resolve(_verifiers[1])), + IVerifier(resolve(_verifiers[2])) + ]); + } + + function reward(bytes memory _proof, RewardArgs memory _args) public { + reward(_proof, _args, new bytes(0), TreeUpdateArgs(0, 0, 0, 0)); + } + + function batchReward(bytes[] calldata _rewardArgs) external { + for (uint256 i = 0; i < _rewardArgs.length; i++) { + (bytes memory proof, RewardArgs memory args) = abi.decode(_rewardArgs[i], (bytes, RewardArgs)); + reward(proof, args); + } + } + + function reward( + bytes memory _proof, + RewardArgs memory _args, + bytes memory _treeUpdateProof, + TreeUpdateArgs memory _treeUpdateArgs + ) public { + validateAccountUpdate(_args.account, _treeUpdateProof, _treeUpdateArgs); + tornadoTrees.validateRoots(_args.depositRoot, _args.withdrawalRoot); + require(_args.extDataHash == keccak248(abi.encode(_args.extData)), "Incorrect external data hash"); + require(_args.fee < 2**248, "Fee value out of range"); + require(_args.rate == rates[_args.instance] && _args.rate > 0, "Invalid reward rate"); + require(!rewardNullifiers[_args.rewardNullifier], "Reward has been already spent"); + require( + rewardVerifier.verifyProof( + _proof, + [ + uint256(_args.rate), + uint256(_args.fee), + uint256(_args.instance), + uint256(_args.rewardNullifier), + uint256(_args.extDataHash), + uint256(_args.account.inputRoot), + uint256(_args.account.inputNullifierHash), + uint256(_args.account.outputRoot), + uint256(_args.account.outputPathIndices), + uint256(_args.account.outputCommitment), + uint256(_args.depositRoot), + uint256(_args.withdrawalRoot) + ] + ), + "Invalid reward proof" + ); + + accountNullifiers[_args.account.inputNullifierHash] = true; + rewardNullifiers[_args.rewardNullifier] = true; + insertAccountRoot(_args.account.inputRoot == getLastAccountRoot() ? _args.account.outputRoot : _treeUpdateArgs.newRoot); + if (_args.fee > 0) { + rewardSwap.swap(_args.extData.relayer, _args.fee); + } + + emit NewAccount( + _args.account.outputCommitment, + _args.account.inputNullifierHash, + _args.extData.encryptedAccount, + accountCount - 1 + ); + } + + function withdraw(bytes memory _proof, WithdrawArgs memory _args) public { + withdraw(_proof, _args, new bytes(0), TreeUpdateArgs(0, 0, 0, 0)); + } + + function withdraw( + bytes memory _proof, + WithdrawArgs memory _args, + bytes memory _treeUpdateProof, + TreeUpdateArgs memory _treeUpdateArgs + ) public { + validateAccountUpdate(_args.account, _treeUpdateProof, _treeUpdateArgs); + require(_args.extDataHash == keccak248(abi.encode(_args.extData)), "Incorrect external data hash"); + require(_args.amount < 2**248, "Amount value out of range"); + require( + withdrawVerifier.verifyProof( + _proof, + [ + uint256(_args.amount), + uint256(_args.extDataHash), + uint256(_args.account.inputRoot), + uint256(_args.account.inputNullifierHash), + uint256(_args.account.outputRoot), + uint256(_args.account.outputPathIndices), + uint256(_args.account.outputCommitment) + ] + ), + "Invalid withdrawal proof" + ); + + insertAccountRoot(_args.account.inputRoot == getLastAccountRoot() ? _args.account.outputRoot : _treeUpdateArgs.newRoot); + accountNullifiers[_args.account.inputNullifierHash] = true; + // allow submitting noop withdrawals (amount == 0) + uint256 amount = _args.amount.sub(_args.extData.fee, "Amount should be greater than fee"); + if (amount > 0) { + rewardSwap.swap(_args.extData.recipient, amount); + } + // Note. The relayer swap rate always will be worse than estimated + if (_args.extData.fee > 0) { + rewardSwap.swap(_args.extData.relayer, _args.extData.fee); + } + + emit NewAccount( + _args.account.outputCommitment, + _args.account.inputNullifierHash, + _args.extData.encryptedAccount, + accountCount - 1 + ); + } + + function setRates(Rate[] memory _rates) external onlyGovernance { + _setRates(_rates); + } + + function setVerifiers(IVerifier[3] calldata _verifiers) external onlyGovernance { + _setVerifiers(_verifiers); + } + + function setTornadoTreesContract(TornadoTrees _tornadoTrees) external onlyGovernance { + tornadoTrees = _tornadoTrees; + } + + function setPoolWeight(uint256 _newWeight) external onlyGovernance { + rewardSwap.setPoolWeight(_newWeight); + } + + // ------VIEW------- + + /** + @dev Whether the root is present in the root history + */ + function isKnownAccountRoot(bytes32 _root, uint256 _index) public view returns (bool) { + return _root != 0 && accountRoots[_index % ACCOUNT_ROOT_HISTORY_SIZE] == _root; + } + + /** + @dev Returns the last root + */ + function getLastAccountRoot() public view returns (bytes32) { + return accountRoots[accountCount % ACCOUNT_ROOT_HISTORY_SIZE]; + } + + // -----INTERNAL------- + + function keccak248(bytes memory _data) internal pure returns (bytes32) { + return keccak256(_data) & 0x00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff; + } + + function validateTreeUpdate( + bytes memory _proof, + TreeUpdateArgs memory _args, + bytes32 _commitment + ) internal view { + require(_proof.length > 0, "Outdated account merkle root"); + require(_args.oldRoot == getLastAccountRoot(), "Outdated tree update merkle root"); + require(_args.leaf == _commitment, "Incorrect commitment inserted"); + require(_args.pathIndices == accountCount, "Incorrect account insert index"); + require( + treeUpdateVerifier.verifyProof( + _proof, + [uint256(_args.oldRoot), uint256(_args.newRoot), uint256(_args.leaf), uint256(_args.pathIndices)] + ), + "Invalid tree update proof" + ); + } + + function validateAccountUpdate( + AccountUpdate memory _account, + bytes memory _treeUpdateProof, + TreeUpdateArgs memory _treeUpdateArgs + ) internal view { + require(!accountNullifiers[_account.inputNullifierHash], "Outdated account state"); + if (_account.inputRoot != getLastAccountRoot()) { + // _account.outputPathIndices (= last tree leaf index) is always equal to root index in the history mapping + // because we always generate a new root for each new leaf + require(isKnownAccountRoot(_account.inputRoot, _account.outputPathIndices), "Invalid account root"); + validateTreeUpdate(_treeUpdateProof, _treeUpdateArgs, _account.outputCommitment); + } else { + require(_account.outputPathIndices == accountCount, "Incorrect account insert index"); + } + } + + function insertAccountRoot(bytes32 _root) internal { + accountRoots[++accountCount % ACCOUNT_ROOT_HISTORY_SIZE] = _root; + } + + function _setRates(Rate[] memory _rates) internal { + for (uint256 i = 0; i < _rates.length; i++) { + require(_rates[i].value < 2**128, "Incorrect rate"); + address instance = resolve(_rates[i].instance); + rates[instance] = _rates[i].value; + emit RateChanged(instance, _rates[i].value); + } + } + + function _setVerifiers(IVerifier[3] memory _verifiers) internal { + rewardVerifier = _verifiers[0]; + withdrawVerifier = _verifiers[1]; + treeUpdateVerifier = _verifiers[2]; + emit VerifiersUpdated(address(_verifiers[0]), address(_verifiers[1]), address(_verifiers[2])); + } +} diff --git a/contracts/RewardSwap.sol b/contracts/RewardSwap.sol new file mode 100644 index 0000000..d71a0da --- /dev/null +++ b/contracts/RewardSwap.sol @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; +import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; +import "torn-token/contracts/ENS.sol"; +import "./utils/FloatMath.sol"; + +/** + Let's imagine we have 1M TORN tokens for anonymity mining to distribute during 1 year (~31536000 seconds). + The contract should constantly add liquidity to a pool of claimed rewards to TORN (REWD/TORN). At any time user can exchange REWD->TORN using + this pool. The rate depends on current available TORN liquidity - the more TORN are withdrawn the worse the swap rate is. + + The contract starts with some virtual balance liquidity and adds some TORN tokens every second to the balance. Users will decrease + this balance by swaps. + + Exchange rate can be calculated as following: + BalanceAfter = BalanceBefore * e^(-rewardAmount/poolWeight) + tokens = BalanceBefore - BalanceAfter +*/ + +contract RewardSwap is EnsResolve { + using SafeMath for uint256; + + uint256 public constant DURATION = 365 days; + + IERC20 public immutable torn; + address public immutable miner; + uint256 public immutable startTimestamp; + uint256 public immutable initialLiquidity; + uint256 public immutable liquidity; + uint256 public tokensSold; + uint256 public poolWeight; + + event Swap(address indexed recipient, uint256 pTORN, uint256 TORN); + event PoolWeightUpdated(uint256 newWeight); + + modifier onlyMiner() { + require(msg.sender == miner, "Only Miner contract can call"); + _; + } + + constructor( + bytes32 _torn, + bytes32 _miner, + uint256 _miningCap, + uint256 _initialLiquidity, + uint256 _poolWeight + ) public { + require(_initialLiquidity <= _miningCap, "Initial liquidity should be lower than mining cap"); + torn = IERC20(resolve(_torn)); + miner = resolve(_miner); + initialLiquidity = _initialLiquidity; + liquidity = _miningCap.sub(_initialLiquidity); + poolWeight = _poolWeight; + startTimestamp = getTimestamp(); + } + + function swap(address _recipient, uint256 _amount) external onlyMiner returns (uint256) { + uint256 tokens = getExpectedReturn(_amount); + tokensSold += tokens; + require(torn.transfer(_recipient, tokens), "transfer failed"); + emit Swap(_recipient, _amount, tokens); + return tokens; + } + + /** + @dev + */ + function getExpectedReturn(uint256 _amount) public view returns (uint256) { + uint256 oldBalance = tornVirtualBalance(); + int128 pow = FloatMath.neg(FloatMath.divu(_amount, poolWeight)); + int128 exp = FloatMath.exp(pow); + uint256 newBalance = FloatMath.mulu(exp, oldBalance); + return oldBalance.sub(newBalance); + } + + function tornVirtualBalance() public view returns (uint256) { + uint256 passedTime = getTimestamp().sub(startTimestamp); + if (passedTime < DURATION) { + return initialLiquidity.add(liquidity.mul(passedTime).div(DURATION)).sub(tokensSold); + } else { + return torn.balanceOf(address(this)); + } + } + + function setPoolWeight(uint256 _newWeight) external onlyMiner { + poolWeight = _newWeight; + emit PoolWeightUpdated(_newWeight); + } + + function getTimestamp() public view virtual returns (uint256) { + return block.timestamp; + } +} diff --git a/contracts/TornadoProxy.sol b/contracts/TornadoProxy.sol new file mode 100644 index 0000000..b64dde9 --- /dev/null +++ b/contracts/TornadoProxy.sol @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; +import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; +import "@openzeppelin/contracts/math/Math.sol"; +import "./interfaces/ITornadoInstance.sol"; +import "./interfaces/ITornadoTrees.sol"; +import "torn-token/contracts/ENS.sol"; + +contract TornadoProxy is EnsResolve { + using SafeERC20 for IERC20; + + event EncryptedNote(address indexed sender, bytes encryptedNote); + + ITornadoTrees public immutable tornadoTrees; + address public immutable governance; + + mapping(ITornadoInstance => bool) public instances; + modifier onlyGovernance() { + require(msg.sender == governance, "Not authorized"); + _; + } + + constructor( + bytes32 _tornadoTrees, + bytes32 _governance, + bytes32[] memory _instances + ) public { + tornadoTrees = ITornadoTrees(resolve(_tornadoTrees)); + governance = resolve(_governance); + + for (uint256 i = 0; i < _instances.length; i++) { + instances[ITornadoInstance(resolve(_instances[i]))] = true; + } + } + + function deposit(ITornadoInstance _tornado, bytes32 _commitment, bytes calldata _encryptedNote) external payable { + require(instances[_tornado], "The instance is not supported"); + + _tornado.deposit{ value: msg.value }(_commitment); + tornadoTrees.registerDeposit(address(_tornado), _commitment); + emit EncryptedNote(msg.sender, _encryptedNote); + } + + function updateInstance(ITornadoInstance _instance, bool _update) external onlyGovernance { + instances[_instance] = _update; + } + + function withdraw( + ITornadoInstance _tornado, + bytes calldata _proof, + bytes32 _root, + bytes32 _nullifierHash, + address payable _recipient, + address payable _relayer, + uint256 _fee, + uint256 _refund + ) external payable { + require(instances[_tornado], "The instance is not supported"); + + _tornado.withdraw{ value: msg.value }(_proof, _root, _nullifierHash, _recipient, _relayer, _fee, _refund); + tornadoTrees.registerWithdrawal(address(_tornado), _nullifierHash); + } + + /// @dev Method to claim junk and accidentally sent tokens + function rescueTokens( + IERC20 _token, + address payable _to, + uint256 _balance + ) external onlyGovernance { + require(_to != address(0), "TORN: can not send to zero address"); + + if (_token == IERC20(0)) { + // for Ether + uint256 totalBalance = address(this).balance; + uint256 balance = _balance == 0 ? totalBalance : Math.min(totalBalance, _balance); + _to.transfer(balance); + } else { + // any other erc20 + uint256 totalBalance = _token.balanceOf(address(this)); + uint256 balance = _balance == 0 ? totalBalance : Math.min(totalBalance, _balance); + require(balance > 0, "TORN: trying to send 0 balance"); + _token.safeTransfer(_to, balance); + } + } +} diff --git a/contracts/TornadoTrees.sol b/contracts/TornadoTrees.sol new file mode 100644 index 0000000..5fadd2e --- /dev/null +++ b/contracts/TornadoTrees.sol @@ -0,0 +1,132 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +pragma experimental ABIEncoderV2; + +import "torn-token/contracts/ENS.sol"; +import "./utils/OwnableMerkleTree.sol"; +import "./interfaces/ITornadoTrees.sol"; +import "./interfaces/IHasher.sol"; + +contract TornadoTrees is ITornadoTrees, EnsResolve { + OwnableMerkleTree public immutable depositTree; + OwnableMerkleTree public immutable withdrawalTree; + IHasher public immutable hasher; + address public immutable tornadoProxy; + + bytes32[] public deposits; + uint256 public lastProcessedDepositLeaf; + + bytes32[] public withdrawals; + uint256 public lastProcessedWithdrawalLeaf; + + event DepositData(address instance, bytes32 indexed hash, uint256 block, uint256 index); + event WithdrawalData(address instance, bytes32 indexed hash, uint256 block, uint256 index); + + struct TreeLeaf { + address instance; + bytes32 hash; + uint256 block; + } + + modifier onlyTornadoProxy { + require(msg.sender == tornadoProxy, "Not authorized"); + _; + } + + constructor( + bytes32 _tornadoProxy, + bytes32 _hasher2, + bytes32 _hasher3, + uint32 _levels + ) public { + tornadoProxy = resolve(_tornadoProxy); + hasher = IHasher(resolve(_hasher3)); + depositTree = new OwnableMerkleTree(_levels, IHasher(resolve(_hasher2))); + withdrawalTree = new OwnableMerkleTree(_levels, IHasher(resolve(_hasher2))); + } + + function registerDeposit(address _instance, bytes32 _commitment) external override onlyTornadoProxy { + deposits.push(keccak256(abi.encode(_instance, _commitment, blockNumber()))); + } + + function registerWithdrawal(address _instance, bytes32 _nullifier) external override onlyTornadoProxy { + withdrawals.push(keccak256(abi.encode(_instance, _nullifier, blockNumber()))); + } + + function updateRoots(TreeLeaf[] calldata _deposits, TreeLeaf[] calldata _withdrawals) external { + if (_deposits.length > 0) updateDepositTree(_deposits); + if (_withdrawals.length > 0) updateWithdrawalTree(_withdrawals); + } + + function updateDepositTree(TreeLeaf[] calldata _deposits) public { + bytes32[] memory leaves = new bytes32[](_deposits.length); + uint256 offset = lastProcessedDepositLeaf; + + for (uint256 i = 0; i < _deposits.length; i++) { + TreeLeaf memory deposit = _deposits[i]; + bytes32 leafHash = keccak256(abi.encode(deposit.instance, deposit.hash, deposit.block)); + require(deposits[offset + i] == leafHash, "Incorrect deposit"); + + leaves[i] = hasher.poseidon([bytes32(uint256(deposit.instance)), deposit.hash, bytes32(deposit.block)]); + delete deposits[offset + i]; + + emit DepositData(deposit.instance, deposit.hash, deposit.block, offset + i); + } + + lastProcessedDepositLeaf = offset + _deposits.length; + depositTree.bulkInsert(leaves); + } + + function updateWithdrawalTree(TreeLeaf[] calldata _withdrawals) public { + bytes32[] memory leaves = new bytes32[](_withdrawals.length); + uint256 offset = lastProcessedWithdrawalLeaf; + + for (uint256 i = 0; i < _withdrawals.length; i++) { + TreeLeaf memory withdrawal = _withdrawals[i]; + bytes32 leafHash = keccak256(abi.encode(withdrawal.instance, withdrawal.hash, withdrawal.block)); + require(withdrawals[offset + i] == leafHash, "Incorrect withdrawal"); + + leaves[i] = hasher.poseidon([bytes32(uint256(withdrawal.instance)), withdrawal.hash, bytes32(withdrawal.block)]); + delete withdrawals[offset + i]; + + emit WithdrawalData(withdrawal.instance, withdrawal.hash, withdrawal.block, offset + i); + } + + lastProcessedWithdrawalLeaf = offset + _withdrawals.length; + withdrawalTree.bulkInsert(leaves); + } + + function validateRoots(bytes32 _depositRoot, bytes32 _withdrawalRoot) public view { + require(depositTree.isKnownRoot(_depositRoot), "Incorrect deposit tree root"); + require(withdrawalTree.isKnownRoot(_withdrawalRoot), "Incorrect withdrawal tree root"); + } + + function depositRoot() external view returns (bytes32) { + return depositTree.getLastRoot(); + } + + function withdrawalRoot() external view returns (bytes32) { + return withdrawalTree.getLastRoot(); + } + + function getRegisteredDeposits() external view returns (bytes32[] memory _deposits) { + uint256 count = deposits.length - lastProcessedDepositLeaf; + _deposits = new bytes32[](count); + for (uint256 i = 0; i < count; i++) { + _deposits[i] = deposits[lastProcessedDepositLeaf + i]; + } + } + + function getRegisteredWithdrawals() external view returns (bytes32[] memory _withdrawals) { + uint256 count = withdrawals.length - lastProcessedWithdrawalLeaf; + _withdrawals = new bytes32[](count); + for (uint256 i = 0; i < count; i++) { + _withdrawals[i] = withdrawals[lastProcessedWithdrawalLeaf + i]; + } + } + + function blockNumber() public view virtual returns (uint256) { + return block.number; + } +} diff --git a/contracts/interfaces/IHasher.sol b/contracts/interfaces/IHasher.sol new file mode 100644 index 0000000..3eed6df --- /dev/null +++ b/contracts/interfaces/IHasher.sol @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +interface IHasher { + function poseidon(bytes32[2] calldata inputs) external pure returns (bytes32); + + function poseidon(bytes32[3] calldata inputs) external pure returns (bytes32); +} diff --git a/contracts/interfaces/IRewardSwap.sol b/contracts/interfaces/IRewardSwap.sol new file mode 100644 index 0000000..15dae24 --- /dev/null +++ b/contracts/interfaces/IRewardSwap.sol @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +interface IRewardSwap { + function swap(address recipient, uint256 amount) external returns (uint256); + + function setPoolWeight(uint256 newWeight) external; +} diff --git a/contracts/interfaces/ITornadoInstance.sol b/contracts/interfaces/ITornadoInstance.sol new file mode 100644 index 0000000..952586d --- /dev/null +++ b/contracts/interfaces/ITornadoInstance.sol @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +interface ITornadoInstance { + function deposit(bytes32 commitment) external payable; + + function withdraw( + bytes calldata proof, + bytes32 root, + bytes32 nullifierHash, + address payable recipient, + address payable relayer, + uint256 fee, + uint256 refund + ) external payable; +} diff --git a/contracts/interfaces/ITornadoTrees.sol b/contracts/interfaces/ITornadoTrees.sol new file mode 100644 index 0000000..df571e6 --- /dev/null +++ b/contracts/interfaces/ITornadoTrees.sol @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +interface ITornadoTrees { + function registerDeposit(address instance, bytes32 commitment) external; + + function registerWithdrawal(address instance, bytes32 nullifier) external; +} diff --git a/contracts/interfaces/IVerifier.sol b/contracts/interfaces/IVerifier.sol new file mode 100644 index 0000000..aed9eeb --- /dev/null +++ b/contracts/interfaces/IVerifier.sol @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +interface IVerifier { + function verifyProof(bytes calldata proof, uint256[4] calldata input) external view returns (bool); + + function verifyProof(bytes calldata proof, uint256[7] calldata input) external view returns (bool); + + function verifyProof(bytes calldata proof, uint256[12] calldata input) external view returns (bool); +} diff --git a/contracts/mocks/MerkleTreeWithHistoryMock.sol b/contracts/mocks/MerkleTreeWithHistoryMock.sol new file mode 100644 index 0000000..ece31c6 --- /dev/null +++ b/contracts/mocks/MerkleTreeWithHistoryMock.sol @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +pragma experimental ABIEncoderV2; + +import "../utils/MerkleTreeWithHistory.sol"; + +contract MerkleTreeWithHistoryMock is MerkleTreeWithHistory { + constructor(uint32 _treeLevels, IHasher _hasher) public MerkleTreeWithHistory(_treeLevels, _hasher) {} + + function insert(bytes32 _leaf) external returns (uint32 index) { + return _insert(_leaf); + } + + function bulkInsert(bytes32[] memory _leaves) external { + _bulkInsert(_leaves); + } +} diff --git a/contracts/mocks/MinerMock.sol b/contracts/mocks/MinerMock.sol new file mode 100644 index 0000000..27a19d5 --- /dev/null +++ b/contracts/mocks/MinerMock.sol @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +pragma experimental ABIEncoderV2; + +import "../Miner.sol"; + +contract MinerMock is Miner { + uint256 public timestamp; + + constructor( + bytes32 _rewardSwap, + bytes32 _governance, + bytes32 _tornadoTrees, + bytes32[3] memory verifiers, + bytes32 _accountRoot, + Rate[] memory _rates + ) public Miner(_rewardSwap, _governance, _tornadoTrees, verifiers, _accountRoot, _rates) {} + + function resolve(bytes32 _addr) public view override returns (address) { + return address(uint160(uint256(_addr) >> (12 * 8))); + } +} diff --git a/contracts/mocks/RewardSwapMock.sol b/contracts/mocks/RewardSwapMock.sol new file mode 100644 index 0000000..63a80f7 --- /dev/null +++ b/contracts/mocks/RewardSwapMock.sol @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +import "../RewardSwap.sol"; + +contract RewardSwapMock is RewardSwap { + uint256 public timestamp; + + constructor( + bytes32 _torn, + bytes32 _miner, + uint256 _miningCap, + uint256 _initialLiquidity, + uint256 _poolWeight + ) public RewardSwap(_torn, _miner, _miningCap, _initialLiquidity, _poolWeight) { + timestamp = block.timestamp; + } + + function setTimestamp(uint256 _timestamp) public { + timestamp = _timestamp; + } + + function resolve(bytes32 _addr) public view override returns (address) { + return address(uint160(uint256(_addr) >> (12 * 8))); + } + + function getTimestamp() public view override returns (uint256) { + if (timestamp == 0) { + return block.timestamp; + } + return timestamp; + } +} diff --git a/contracts/mocks/TORNMock.sol b/contracts/mocks/TORNMock.sol new file mode 100644 index 0000000..f526858 --- /dev/null +++ b/contracts/mocks/TORNMock.sol @@ -0,0 +1,5 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +import "torn-token/contracts/mocks/TORNMock.sol"; diff --git a/contracts/mocks/TornadoTreesMock.sol b/contracts/mocks/TornadoTreesMock.sol new file mode 100644 index 0000000..e06953f --- /dev/null +++ b/contracts/mocks/TornadoTreesMock.sol @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +pragma experimental ABIEncoderV2; + +import "../TornadoTrees.sol"; + +contract TornadoTreesMock is TornadoTrees { + uint256 public timestamp; + uint256 public currentBlock; + + constructor( + bytes32 _tornadoProxy, + bytes32 _hasher2, + bytes32 _hasher3, + uint32 _levels + ) public TornadoTrees(_tornadoProxy, _hasher2, _hasher3, _levels) {} + + function resolve(bytes32 _addr) public view override returns (address) { + return address(uint160(uint256(_addr) >> (12 * 8))); + } + + function setBlockNumber(uint256 _blockNumber) public { + currentBlock = _blockNumber; + } + + function blockNumber() public view override returns (uint256) { + return currentBlock == 0 ? block.number : currentBlock; + } +} diff --git a/contracts/utils/Echoer.sol b/contracts/utils/Echoer.sol new file mode 100644 index 0000000..83e47fe --- /dev/null +++ b/contracts/utils/Echoer.sol @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; + +contract Echoer { + event Echo(address indexed who, bytes data); + + function echo(bytes calldata _data) external { + emit Echo(msg.sender, _data); + } +} diff --git a/contracts/utils/FloatMath.sol b/contracts/utils/FloatMath.sol new file mode 100644 index 0000000..357f461 --- /dev/null +++ b/contracts/utils/FloatMath.sol @@ -0,0 +1,710 @@ +// SPDX-License-Identifier: BSD-4-Clause +/* + * ABDK Math 64.64 Smart Contract Library. Copyright © 2019 by ABDK Consulting. + * Author: Mikhail Vladimirov + */ +pragma solidity ^0.5.0 || ^0.6.0 || ^0.7.0; + +/** + * Smart contract library of mathematical functions operating with signed + * 64.64-bit fixed point numbers. Signed 64.64-bit fixed point number is + * basically a simple fraction whose numerator is signed 128-bit integer and + * denominator is 2^64. As long as denominator is always the same, there is no + * need to store it, thus in Solidity signed 64.64-bit fixed point numbers are + * represented by int128 type holding only the numerator. + */ +library FloatMath { + /* + * Minimum value signed 64.64-bit fixed point number may have. + */ + int128 private constant MIN_64x64 = -0x80000000000000000000000000000000; + + /* + * Maximum value signed 64.64-bit fixed point number may have. + */ + int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF; + + /** + * Convert signed 256-bit integer number into signed 64.64-bit fixed point + * number. Revert on overflow. + * + * @param x signed 256-bit integer number + * @return signed 64.64-bit fixed point number + */ + function fromInt (int256 x) internal pure returns (int128) { + require (x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF); + return int128 (x << 64); + } + + /** + * Convert signed 64.64 fixed point number into signed 64-bit integer number + * rounding down. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64-bit integer number + */ + function toInt (int128 x) internal pure returns (int64) { + return int64 (x >> 64); + } + + /** + * Convert unsigned 256-bit integer number into signed 64.64-bit fixed point + * number. Revert on overflow. + * + * @param x unsigned 256-bit integer number + * @return signed 64.64-bit fixed point number + */ + function fromUInt (uint256 x) internal pure returns (int128) { + require (x <= 0x7FFFFFFFFFFFFFFF); + return int128 (x << 64); + } + + /** + * Convert signed 64.64 fixed point number into unsigned 64-bit integer + * number rounding down. Revert on underflow. + * + * @param x signed 64.64-bit fixed point number + * @return unsigned 64-bit integer number + */ + function toUInt (int128 x) internal pure returns (uint64) { + require (x >= 0); + return uint64 (x >> 64); + } + + /** + * Convert signed 128.128 fixed point number into signed 64.64-bit fixed point + * number rounding down. Revert on overflow. + * + * @param x signed 128.128-bin fixed point number + * @return signed 64.64-bit fixed point number + */ + function from128x128 (int256 x) internal pure returns (int128) { + int256 result = x >> 64; + require (result >= MIN_64x64 && result <= MAX_64x64); + return int128 (result); + } + + /** + * Convert signed 64.64 fixed point number into signed 128.128 fixed point + * number. + * + * @param x signed 64.64-bit fixed point number + * @return signed 128.128 fixed point number + */ + function to128x128 (int128 x) internal pure returns (int256) { + return int256 (x) << 64; + } + + /** + * Calculate x + y. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @param y signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function add (int128 x, int128 y) internal pure returns (int128) { + int256 result = int256(x) + y; + require (result >= MIN_64x64 && result <= MAX_64x64); + return int128 (result); + } + + /** + * Calculate x - y. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @param y signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function sub (int128 x, int128 y) internal pure returns (int128) { + int256 result = int256(x) - y; + require (result >= MIN_64x64 && result <= MAX_64x64); + return int128 (result); + } + + /** + * Calculate x * y rounding down. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @param y signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function mul (int128 x, int128 y) internal pure returns (int128) { + int256 result = int256(x) * y >> 64; + require (result >= MIN_64x64 && result <= MAX_64x64); + return int128 (result); + } + + /** + * Calculate x * y rounding towards zero, where x is signed 64.64 fixed point + * number and y is signed 256-bit integer number. Revert on overflow. + * + * @param x signed 64.64 fixed point number + * @param y signed 256-bit integer number + * @return signed 256-bit integer number + */ + function muli (int128 x, int256 y) internal pure returns (int256) { + if (x == MIN_64x64) { + require (y >= -0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF && + y <= 0x1000000000000000000000000000000000000000000000000); + return -y << 63; + } else { + bool negativeResult = false; + if (x < 0) { + x = -x; + negativeResult = true; + } + if (y < 0) { + y = -y; // We rely on overflow behavior here + negativeResult = !negativeResult; + } + uint256 absoluteResult = mulu (x, uint256 (y)); + if (negativeResult) { + require (absoluteResult <= + 0x8000000000000000000000000000000000000000000000000000000000000000); + return -int256 (absoluteResult); // We rely on overflow behavior here + } else { + require (absoluteResult <= + 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + return int256 (absoluteResult); + } + } + } + + /** + * Calculate x * y rounding down, where x is signed 64.64 fixed point number + * and y is unsigned 256-bit integer number. Revert on overflow. + * + * @param x signed 64.64 fixed point number + * @param y unsigned 256-bit integer number + * @return unsigned 256-bit integer number + */ + function mulu (int128 x, uint256 y) internal pure returns (uint256) { + if (y == 0) return 0; + + require (x >= 0); + + uint256 lo = (uint256 (x) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64; + uint256 hi = uint256 (x) * (y >> 128); + + require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + hi <<= 64; + + require (hi <= + 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo); + return hi + lo; + } + + /** + * Calculate x / y rounding towards zero. Revert on overflow or when y is + * zero. + * + * @param x signed 64.64-bit fixed point number + * @param y signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function div (int128 x, int128 y) internal pure returns (int128) { + require (y != 0); + int256 result = (int256 (x) << 64) / y; + require (result >= MIN_64x64 && result <= MAX_64x64); + return int128 (result); + } + + /** + * Calculate x / y rounding towards zero, where x and y are signed 256-bit + * integer numbers. Revert on overflow or when y is zero. + * + * @param x signed 256-bit integer number + * @param y signed 256-bit integer number + * @return signed 64.64-bit fixed point number + */ + function divi (int256 x, int256 y) internal pure returns (int128) { + require (y != 0); + + bool negativeResult = false; + if (x < 0) { + x = -x; // We rely on overflow behavior here + negativeResult = true; + } + if (y < 0) { + y = -y; // We rely on overflow behavior here + negativeResult = !negativeResult; + } + uint128 absoluteResult = divuu (uint256 (x), uint256 (y)); + if (negativeResult) { + require (absoluteResult <= 0x80000000000000000000000000000000); + return -int128 (absoluteResult); // We rely on overflow behavior here + } else { + require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + return int128 (absoluteResult); // We rely on overflow behavior here + } + } + + /** + * Calculate x / y rounding towards zero, where x and y are unsigned 256-bit + * integer numbers. Revert on overflow or when y is zero. + * + * @param x unsigned 256-bit integer number + * @param y unsigned 256-bit integer number + * @return signed 64.64-bit fixed point number + */ + function divu (uint256 x, uint256 y) internal pure returns (int128) { + require (y != 0); + uint128 result = divuu (x, y); + require (result <= uint128 (MAX_64x64)); + return int128 (result); + } + + /** + * Calculate -x. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function neg (int128 x) internal pure returns (int128) { + require (x != MIN_64x64); + return -x; + } + + /** + * Calculate |x|. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function abs (int128 x) internal pure returns (int128) { + require (x != MIN_64x64); + return x < 0 ? -x : x; + } + + /** + * Calculate 1 / x rounding towards zero. Revert on overflow or when x is + * zero. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function inv (int128 x) internal pure returns (int128) { + require (x != 0); + int256 result = int256 (0x100000000000000000000000000000000) / x; + require (result >= MIN_64x64 && result <= MAX_64x64); + return int128 (result); + } + + /** + * Calculate arithmetics average of x and y, i.e. (x + y) / 2 rounding down. + * + * @param x signed 64.64-bit fixed point number + * @param y signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function avg (int128 x, int128 y) internal pure returns (int128) { + return int128 ((int256 (x) + int256 (y)) >> 1); + } + + /** + * Calculate geometric average of x and y, i.e. sqrt (x * y) rounding down. + * Revert on overflow or in case x * y is negative. + * + * @param x signed 64.64-bit fixed point number + * @param y signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function gavg (int128 x, int128 y) internal pure returns (int128) { + int256 m = int256 (x) * int256 (y); + require (m >= 0); + require (m < + 0x4000000000000000000000000000000000000000000000000000000000000000); + return int128 (sqrtu (uint256 (m))); + } + + /** + * Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number + * and y is unsigned 256-bit integer number. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @param y uint256 value + * @return signed 64.64-bit fixed point number + */ + function pow (int128 x, uint256 y) internal pure returns (int128) { + uint256 absoluteResult; + bool negativeResult = false; + if (x >= 0) { + absoluteResult = powu (uint256 (x) << 63, y); + } else { + // We rely on overflow behavior here + absoluteResult = powu (uint256 (uint128 (-x)) << 63, y); + negativeResult = y & 1 > 0; + } + + absoluteResult >>= 63; + + if (negativeResult) { + require (absoluteResult <= 0x80000000000000000000000000000000); + return -int128 (absoluteResult); // We rely on overflow behavior here + } else { + require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + return int128 (absoluteResult); // We rely on overflow behavior here + } + } + + /** + * Calculate sqrt (x) rounding down. Revert if x < 0. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function sqrt (int128 x) internal pure returns (int128) { + require (x >= 0); + return int128 (sqrtu (uint256 (x) << 64)); + } + + /** + * Calculate binary logarithm of x. Revert if x <= 0. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function log_2 (int128 x) internal pure returns (int128) { + require (x > 0); + + int256 msb = 0; + int256 xc = x; + if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; } + if (xc >= 0x100000000) { xc >>= 32; msb += 32; } + if (xc >= 0x10000) { xc >>= 16; msb += 16; } + if (xc >= 0x100) { xc >>= 8; msb += 8; } + if (xc >= 0x10) { xc >>= 4; msb += 4; } + if (xc >= 0x4) { xc >>= 2; msb += 2; } + if (xc >= 0x2) msb += 1; // No need to shift xc anymore + + int256 result = msb - 64 << 64; + uint256 ux = uint256 (x) << uint256 (127 - msb); + for (int256 bit = 0x8000000000000000; bit > 0; bit >>= 1) { + ux *= ux; + uint256 b = ux >> 255; + ux >>= 127 + b; + result += bit * int256 (b); + } + + return int128 (result); + } + + /** + * Calculate natural logarithm of x. Revert if x <= 0. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function ln (int128 x) internal pure returns (int128) { + require (x > 0); + + return int128 ( + uint256 (log_2 (x)) * 0xB17217F7D1CF79ABC9E3B39803F2F6AF >> 128); + } + + /** + * Calculate binary exponent of x. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function exp_2 (int128 x) internal pure returns (int128) { + require (x < 0x400000000000000000); // Overflow + + if (x < -0x400000000000000000) return 0; // Underflow + + uint256 result = 0x80000000000000000000000000000000; + + if (x & 0x8000000000000000 > 0) + result = result * 0x16A09E667F3BCC908B2FB1366EA957D3E >> 128; + if (x & 0x4000000000000000 > 0) + result = result * 0x1306FE0A31B7152DE8D5A46305C85EDEC >> 128; + if (x & 0x2000000000000000 > 0) + result = result * 0x1172B83C7D517ADCDF7C8C50EB14A791F >> 128; + if (x & 0x1000000000000000 > 0) + result = result * 0x10B5586CF9890F6298B92B71842A98363 >> 128; + if (x & 0x800000000000000 > 0) + result = result * 0x1059B0D31585743AE7C548EB68CA417FD >> 128; + if (x & 0x400000000000000 > 0) + result = result * 0x102C9A3E778060EE6F7CACA4F7A29BDE8 >> 128; + if (x & 0x200000000000000 > 0) + result = result * 0x10163DA9FB33356D84A66AE336DCDFA3F >> 128; + if (x & 0x100000000000000 > 0) + result = result * 0x100B1AFA5ABCBED6129AB13EC11DC9543 >> 128; + if (x & 0x80000000000000 > 0) + result = result * 0x10058C86DA1C09EA1FF19D294CF2F679B >> 128; + if (x & 0x40000000000000 > 0) + result = result * 0x1002C605E2E8CEC506D21BFC89A23A00F >> 128; + if (x & 0x20000000000000 > 0) + result = result * 0x100162F3904051FA128BCA9C55C31E5DF >> 128; + if (x & 0x10000000000000 > 0) + result = result * 0x1000B175EFFDC76BA38E31671CA939725 >> 128; + if (x & 0x8000000000000 > 0) + result = result * 0x100058BA01FB9F96D6CACD4B180917C3D >> 128; + if (x & 0x4000000000000 > 0) + result = result * 0x10002C5CC37DA9491D0985C348C68E7B3 >> 128; + if (x & 0x2000000000000 > 0) + result = result * 0x1000162E525EE054754457D5995292026 >> 128; + if (x & 0x1000000000000 > 0) + result = result * 0x10000B17255775C040618BF4A4ADE83FC >> 128; + if (x & 0x800000000000 > 0) + result = result * 0x1000058B91B5BC9AE2EED81E9B7D4CFAB >> 128; + if (x & 0x400000000000 > 0) + result = result * 0x100002C5C89D5EC6CA4D7C8ACC017B7C9 >> 128; + if (x & 0x200000000000 > 0) + result = result * 0x10000162E43F4F831060E02D839A9D16D >> 128; + if (x & 0x100000000000 > 0) + result = result * 0x100000B1721BCFC99D9F890EA06911763 >> 128; + if (x & 0x80000000000 > 0) + result = result * 0x10000058B90CF1E6D97F9CA14DBCC1628 >> 128; + if (x & 0x40000000000 > 0) + result = result * 0x1000002C5C863B73F016468F6BAC5CA2B >> 128; + if (x & 0x20000000000 > 0) + result = result * 0x100000162E430E5A18F6119E3C02282A5 >> 128; + if (x & 0x10000000000 > 0) + result = result * 0x1000000B1721835514B86E6D96EFD1BFE >> 128; + if (x & 0x8000000000 > 0) + result = result * 0x100000058B90C0B48C6BE5DF846C5B2EF >> 128; + if (x & 0x4000000000 > 0) + result = result * 0x10000002C5C8601CC6B9E94213C72737A >> 128; + if (x & 0x2000000000 > 0) + result = result * 0x1000000162E42FFF037DF38AA2B219F06 >> 128; + if (x & 0x1000000000 > 0) + result = result * 0x10000000B17217FBA9C739AA5819F44F9 >> 128; + if (x & 0x800000000 > 0) + result = result * 0x1000000058B90BFCDEE5ACD3C1CEDC823 >> 128; + if (x & 0x400000000 > 0) + result = result * 0x100000002C5C85FE31F35A6A30DA1BE50 >> 128; + if (x & 0x200000000 > 0) + result = result * 0x10000000162E42FF0999CE3541B9FFFCF >> 128; + if (x & 0x100000000 > 0) + result = result * 0x100000000B17217F80F4EF5AADDA45554 >> 128; + if (x & 0x80000000 > 0) + result = result * 0x10000000058B90BFBF8479BD5A81B51AD >> 128; + if (x & 0x40000000 > 0) + result = result * 0x1000000002C5C85FDF84BD62AE30A74CC >> 128; + if (x & 0x20000000 > 0) + result = result * 0x100000000162E42FEFB2FED257559BDAA >> 128; + if (x & 0x10000000 > 0) + result = result * 0x1000000000B17217F7D5A7716BBA4A9AE >> 128; + if (x & 0x8000000 > 0) + result = result * 0x100000000058B90BFBE9DDBAC5E109CCE >> 128; + if (x & 0x4000000 > 0) + result = result * 0x10000000002C5C85FDF4B15DE6F17EB0D >> 128; + if (x & 0x2000000 > 0) + result = result * 0x1000000000162E42FEFA494F1478FDE05 >> 128; + if (x & 0x1000000 > 0) + result = result * 0x10000000000B17217F7D20CF927C8E94C >> 128; + if (x & 0x800000 > 0) + result = result * 0x1000000000058B90BFBE8F71CB4E4B33D >> 128; + if (x & 0x400000 > 0) + result = result * 0x100000000002C5C85FDF477B662B26945 >> 128; + if (x & 0x200000 > 0) + result = result * 0x10000000000162E42FEFA3AE53369388C >> 128; + if (x & 0x100000 > 0) + result = result * 0x100000000000B17217F7D1D351A389D40 >> 128; + if (x & 0x80000 > 0) + result = result * 0x10000000000058B90BFBE8E8B2D3D4EDE >> 128; + if (x & 0x40000 > 0) + result = result * 0x1000000000002C5C85FDF4741BEA6E77E >> 128; + if (x & 0x20000 > 0) + result = result * 0x100000000000162E42FEFA39FE95583C2 >> 128; + if (x & 0x10000 > 0) + result = result * 0x1000000000000B17217F7D1CFB72B45E1 >> 128; + if (x & 0x8000 > 0) + result = result * 0x100000000000058B90BFBE8E7CC35C3F0 >> 128; + if (x & 0x4000 > 0) + result = result * 0x10000000000002C5C85FDF473E242EA38 >> 128; + if (x & 0x2000 > 0) + result = result * 0x1000000000000162E42FEFA39F02B772C >> 128; + if (x & 0x1000 > 0) + result = result * 0x10000000000000B17217F7D1CF7D83C1A >> 128; + if (x & 0x800 > 0) + result = result * 0x1000000000000058B90BFBE8E7BDCBE2E >> 128; + if (x & 0x400 > 0) + result = result * 0x100000000000002C5C85FDF473DEA871F >> 128; + if (x & 0x200 > 0) + result = result * 0x10000000000000162E42FEFA39EF44D91 >> 128; + if (x & 0x100 > 0) + result = result * 0x100000000000000B17217F7D1CF79E949 >> 128; + if (x & 0x80 > 0) + result = result * 0x10000000000000058B90BFBE8E7BCE544 >> 128; + if (x & 0x40 > 0) + result = result * 0x1000000000000002C5C85FDF473DE6ECA >> 128; + if (x & 0x20 > 0) + result = result * 0x100000000000000162E42FEFA39EF366F >> 128; + if (x & 0x10 > 0) + result = result * 0x1000000000000000B17217F7D1CF79AFA >> 128; + if (x & 0x8 > 0) + result = result * 0x100000000000000058B90BFBE8E7BCD6D >> 128; + if (x & 0x4 > 0) + result = result * 0x10000000000000002C5C85FDF473DE6B2 >> 128; + if (x & 0x2 > 0) + result = result * 0x1000000000000000162E42FEFA39EF358 >> 128; + if (x & 0x1 > 0) + result = result * 0x10000000000000000B17217F7D1CF79AB >> 128; + + result >>= uint256 (63 - (x >> 64)); + require (result <= uint256 (MAX_64x64)); + + return int128 (result); + } + + /** + * Calculate natural exponent of x. Revert on overflow. + * + * @param x signed 64.64-bit fixed point number + * @return signed 64.64-bit fixed point number + */ + function exp (int128 x) internal pure returns (int128) { + require (x < 0x400000000000000000); // Overflow + + if (x < -0x400000000000000000) return 0; // Underflow + + return exp_2 ( + int128 (int256 (x) * 0x171547652B82FE1777D0FFDA0D23A7D12 >> 128)); + } + + /** + * Calculate x / y rounding towards zero, where x and y are unsigned 256-bit + * integer numbers. Revert on overflow or when y is zero. + * + * @param x unsigned 256-bit integer number + * @param y unsigned 256-bit integer number + * @return unsigned 64.64-bit fixed point number + */ + function divuu (uint256 x, uint256 y) private pure returns (uint128) { + require (y != 0); + + uint256 result; + + if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF) + result = (x << 64) / y; + else { + uint256 msb = 192; + uint256 xc = x >> 192; + if (xc >= 0x100000000) { xc >>= 32; msb += 32; } + if (xc >= 0x10000) { xc >>= 16; msb += 16; } + if (xc >= 0x100) { xc >>= 8; msb += 8; } + if (xc >= 0x10) { xc >>= 4; msb += 4; } + if (xc >= 0x4) { xc >>= 2; msb += 2; } + if (xc >= 0x2) msb += 1; // No need to shift xc anymore + + result = (x << 255 - msb) / ((y - 1 >> msb - 191) + 1); + require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + + uint256 hi = result * (y >> 128); + uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + + uint256 xh = x >> 192; + uint256 xl = x << 64; + + if (xl < lo) xh -= 1; + xl -= lo; // We rely on overflow behavior here + lo = hi << 128; + if (xl < lo) xh -= 1; + xl -= lo; // We rely on overflow behavior here + + assert (xh == hi >> 128); + + result += xl / y; + } + + require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); + return uint128 (result); + } + + /** + * Calculate x^y assuming 0^0 is 1, where x is unsigned 129.127 fixed point + * number and y is unsigned 256-bit integer number. Revert on overflow. + * + * @param x unsigned 129.127-bit fixed point number + * @param y uint256 value + * @return unsigned 129.127-bit fixed point number + */ + function powu (uint256 x, uint256 y) private pure returns (uint256) { + if (y == 0) return 0x80000000000000000000000000000000; + else if (x == 0) return 0; + else { + int256 msb = 0; + uint256 xc = x; + if (xc >= 0x100000000000000000000000000000000) { xc >>= 128; msb += 128; } + if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; } + if (xc >= 0x100000000) { xc >>= 32; msb += 32; } + if (xc >= 0x10000) { xc >>= 16; msb += 16; } + if (xc >= 0x100) { xc >>= 8; msb += 8; } + if (xc >= 0x10) { xc >>= 4; msb += 4; } + if (xc >= 0x4) { xc >>= 2; msb += 2; } + if (xc >= 0x2) msb += 1; // No need to shift xc anymore + + int256 xe = msb - 127; + if (xe > 0) x >>= uint256 (xe); + else x <<= uint256 (-xe); + + uint256 result = 0x80000000000000000000000000000000; + int256 re = 0; + + while (y > 0) { + if (y & 1 > 0) { + result = result * x; + y -= 1; + re += xe; + if (result >= + 0x8000000000000000000000000000000000000000000000000000000000000000) { + result >>= 128; + re += 1; + } else result >>= 127; + if (re < -127) return 0; // Underflow + require (re < 128); // Overflow + } else { + x = x * x; + y >>= 1; + xe <<= 1; + if (x >= + 0x8000000000000000000000000000000000000000000000000000000000000000) { + x >>= 128; + xe += 1; + } else x >>= 127; + if (xe < -127) return 0; // Underflow + require (xe < 128); // Overflow + } + } + + if (re > 0) result <<= uint256 (re); + else if (re < 0) result >>= uint256 (-re); + + return result; + } + } + + /** + * Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer + * number. + * + * @param x unsigned 256-bit integer number + * @return unsigned 128-bit integer number + */ + function sqrtu (uint256 x) private pure returns (uint128) { + if (x == 0) return 0; + else { + uint256 xx = x; + uint256 r = 1; + if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; } + if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; } + if (xx >= 0x100000000) { xx >>= 32; r <<= 16; } + if (xx >= 0x10000) { xx >>= 16; r <<= 8; } + if (xx >= 0x100) { xx >>= 8; r <<= 4; } + if (xx >= 0x10) { xx >>= 4; r <<= 2; } + if (xx >= 0x8) { r <<= 1; } + r = (r + x / r) >> 1; + r = (r + x / r) >> 1; + r = (r + x / r) >> 1; + r = (r + x / r) >> 1; + r = (r + x / r) >> 1; + r = (r + x / r) >> 1; + r = (r + x / r) >> 1; // Seven iterations should be enough + uint256 r1 = x / r; + return uint128 (r < r1 ? r : r1); + } + } +} diff --git a/contracts/utils/MerkleTreeWithHistory.sol b/contracts/utils/MerkleTreeWithHistory.sol new file mode 100644 index 0000000..af6a3ca --- /dev/null +++ b/contracts/utils/MerkleTreeWithHistory.sol @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +import "../interfaces/IHasher.sol"; + +contract MerkleTreeWithHistory { + uint256 public constant FIELD_SIZE = 21888242871839275222246405745257275088548364400416034343698204186575808495617; + uint256 public constant ZERO_VALUE = 21663839004416932945382355908790599225266501822907911457504978515578255421292; // = keccak256("tornado") % FIELD_SIZE + + uint32 public immutable levels; + IHasher public hasher; // todo immutable + + bytes32[] public filledSubtrees; + bytes32[] public zeros; + uint32 public currentRootIndex = 0; + uint32 public nextIndex = 0; + uint32 public constant ROOT_HISTORY_SIZE = 10; + bytes32[ROOT_HISTORY_SIZE] public roots; + + constructor(uint32 _treeLevels, IHasher _hasher) public { + require(_treeLevels > 0, "_treeLevels should be greater than zero"); + require(_treeLevels < 32, "_treeLevels should be less than 32"); + levels = _treeLevels; + hasher = _hasher; + + bytes32 currentZero = bytes32(ZERO_VALUE); + zeros.push(currentZero); + filledSubtrees.push(currentZero); + + for (uint32 i = 1; i < _treeLevels; i++) { + currentZero = hashLeftRight(currentZero, currentZero); + zeros.push(currentZero); + filledSubtrees.push(currentZero); + } + + filledSubtrees.push(hashLeftRight(currentZero, currentZero)); + roots[0] = filledSubtrees[_treeLevels]; + } + + /** + @dev Hash 2 tree leaves, returns poseidon(_left, _right) + */ + function hashLeftRight(bytes32 _left, bytes32 _right) public view returns (bytes32) { + return hasher.poseidon([_left, _right]); + } + + function _insert(bytes32 _leaf) internal returns (uint32 index) { + uint32 currentIndex = nextIndex; + require(currentIndex != uint32(2)**levels, "Merkle tree is full. No more leaves can be added"); + nextIndex = currentIndex + 1; + bytes32 currentLevelHash = _leaf; + bytes32 left; + bytes32 right; + + for (uint32 i = 0; i < levels; i++) { + if (currentIndex % 2 == 0) { + left = currentLevelHash; + right = zeros[i]; + filledSubtrees[i] = currentLevelHash; + } else { + left = filledSubtrees[i]; + right = currentLevelHash; + } + + currentLevelHash = hashLeftRight(left, right); + currentIndex /= 2; + } + + currentRootIndex = (currentRootIndex + 1) % ROOT_HISTORY_SIZE; + roots[currentRootIndex] = currentLevelHash; + return nextIndex - 1; + } + + function _bulkInsert(bytes32[] memory _leaves) internal { + uint32 insertIndex = nextIndex; + require(insertIndex + _leaves.length <= uint32(2)**levels, "Merkle doesn't have enough capacity to add specified leaves"); + + bytes32[] memory subtrees = new bytes32[](levels); + bool[] memory modifiedSubtrees = new bool[](levels); + for (uint32 j = 0; j < _leaves.length - 1; j++) { + uint256 index = insertIndex + j; + bytes32 currentLevelHash = _leaves[j]; + + for (uint32 i = 0; ; i++) { + if (index % 2 == 0) { + modifiedSubtrees[i] = true; + subtrees[i] = currentLevelHash; + break; + } + + if(subtrees[i] == bytes32(0)) { + subtrees[i] = filledSubtrees[i]; + } + currentLevelHash = hashLeftRight(subtrees[i], currentLevelHash); + index /= 2; + } + } + + for (uint32 i = 0; i < levels; i++) { + // using local map to save on gas on writes if elements were not modified + if (modifiedSubtrees[i]) { + filledSubtrees[i] = subtrees[i]; + } + } + + nextIndex = uint32(insertIndex + _leaves.length - 1); + _insert(_leaves[_leaves.length - 1]); + } + + /** + @dev Whether the root is present in the root history + */ + function isKnownRoot(bytes32 _root) public view returns (bool) { + if (_root == 0) { + return false; + } + uint32 i = currentRootIndex; + do { + if (_root == roots[i]) { + return true; + } + if (i == 0) { + i = ROOT_HISTORY_SIZE; + } + i--; + } while (i != currentRootIndex); + return false; + } + + /** + @dev Returns the last root + */ + function getLastRoot() public view returns (bytes32) { + return roots[currentRootIndex]; + } +} diff --git a/contracts/utils/OwnableMerkleTree.sol b/contracts/utils/OwnableMerkleTree.sol new file mode 100644 index 0000000..cdb8436 --- /dev/null +++ b/contracts/utils/OwnableMerkleTree.sol @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.6.0; +import "@openzeppelin/contracts/access/Ownable.sol"; +import "./MerkleTreeWithHistory.sol"; + +contract OwnableMerkleTree is Ownable, MerkleTreeWithHistory { + constructor(uint32 _treeLevels, IHasher _hasher) public MerkleTreeWithHistory(_treeLevels, _hasher) {} + + function insert(bytes32 _leaf) external onlyOwner returns (uint32 index) { + return _insert(_leaf); + } + + function bulkInsert(bytes32[] calldata _leaves) external onlyOwner { + _bulkInsert(_leaves); + } +} diff --git a/contracts/verifiers/RewardVerifier.sol b/contracts/verifiers/RewardVerifier.sol new file mode 120000 index 0000000..3372b79 --- /dev/null +++ b/contracts/verifiers/RewardVerifier.sol @@ -0,0 +1 @@ +../../build/circuits/RewardVerifier.sol \ No newline at end of file diff --git a/contracts/verifiers/TreeUpdateVerifier.sol b/contracts/verifiers/TreeUpdateVerifier.sol new file mode 120000 index 0000000..3219ddc --- /dev/null +++ b/contracts/verifiers/TreeUpdateVerifier.sol @@ -0,0 +1 @@ +../../build/circuits/TreeUpdateVerifier.sol \ No newline at end of file diff --git a/contracts/verifiers/WithdrawVerifier.sol b/contracts/verifiers/WithdrawVerifier.sol new file mode 120000 index 0000000..f667b83 --- /dev/null +++ b/contracts/verifiers/WithdrawVerifier.sol @@ -0,0 +1 @@ +../../build/circuits/WithdrawVerifier.sol \ No newline at end of file diff --git a/index.js b/index.js new file mode 100644 index 0000000..20d8693 --- /dev/null +++ b/index.js @@ -0,0 +1,6 @@ +module.exports = { + Note: require('./src/note'), + Account: require('./src/account'), + Controller: require('./src/controller'), + Utils: require('./src/utils'), +} diff --git a/package.json b/package.json new file mode 100644 index 0000000..ef5d1ea --- /dev/null +++ b/package.json @@ -0,0 +1,62 @@ +{ + "name": "tornado-cash-anonymity-mining", + "version": "1.0.0", + "main": "index.js", + "repository": "https://github.com/tornadocash/tornado-anonymity-mining.git", + "author": "Tornadocash team ", + "license": "MIT", + "files": [ + "index.js", + "src/*", + "contracts/*" + ], + "scripts": { + "compile": "truffle compile", + "coverage": "yarn compile && truffle run coverage", + "test": "truffle test", + "test:stacktrace": "yarn test --stacktrace", + "eslint": "eslint --ext .js --ignore-path .gitignore .", + "prettier:check": "prettier --check . --config .prettierrc", + "prettier:fix": "prettier --write . --config .prettierrc", + "lint": "yarn eslint && yarn prettier:check", + "deploy:mainnet": "truffle migrate --network mainnet", + "deploy:kovan": "truffle migrate --network kovan", + "deploy:dev": "truffle migrate --skip-dry-run --network development", + "verify": "truffle run verify --network $NETWORK", + "circuit:reward": "scripts/buildCircuit.sh Reward", + "circuit:withdraw": "scripts/buildCircuit.sh Withdraw", + "circuit:treeUpdate": "scripts/buildCircuit.sh TreeUpdate", + "circuit": "mkdir -p build/circuits && yarn circuit:reward && yarn circuit:withdraw && yarn circuit:treeUpdate" + }, + "devDependencies": { + "@openzeppelin/contracts": "^3.1.0", + "babel-eslint": "^10.1.0", + "bn-chai": "^1.0.1", + "chai": "^4.2.0", + "chai-as-promised": "^7.1.1", + "circom": "0.0.35", + "dotenv": "^8.2.0", + "eslint": "^7.5.0", + "eslint-config-prettier": "^6.11.0", + "eslint-plugin-prettier": "^3.1.4", + "prettier": "^2.1.2", + "prettier-plugin-solidity": "^1.0.0-alpha.59", + "rlp": "^2.2.6", + "solhint-plugin-prettier": "^0.0.4", + "solidity-coverage": "^0.7.7", + "torn-token": "git+https://github.com/tornadocash/torn-token.git#87743ba239c191baf8d351498d4007dfcd16d3d2", + "truffle": "^5.1.29", + "truffle-flattener": "^1.4.4", + "truffle-hdwallet-provider": "^1.0.17", + "truffle-plugin-verify": "^0.3.11" + }, + "dependencies": { + "circomlib": "git+https://github.com/tornadocash/circomlib.git#3b492f9801573eebcfe1b6c584afe8a3beecf2b4", + "decimal.js": "^10.2.0", + "eth-sig-util": "^2.5.3", + "fixed-merkle-tree": "^0.3.4", + "snarkjs": "git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5", + "web3": "^1.2.11", + "websnark": "git+https://github.com/tornadocash/websnark.git#86a526718cd6f6f5d31bdb1fe26a9ec8819f633e" + } +} diff --git a/scripts/buildCircuit.sh b/scripts/buildCircuit.sh new file mode 100755 index 0000000..d2403c4 --- /dev/null +++ b/scripts/buildCircuit.sh @@ -0,0 +1,8 @@ +#!/bin/bash +npx circom circuits/$1.circom -o build/circuits/$1.json +npx snarkjs info -c build/circuits/$1.json +zkutil setup -c build/circuits/$1.json -p build/circuits/$1.params +zkutil export-keys -c build/circuits/$1.json -p build/circuits/$1.params --pk build/circuits/$1_proving_key.json --vk build/circuits/$1_verification_key.json +node node_modules/websnark/tools/buildpkey.js -i build/circuits/$1_proving_key.json -o build/circuits/$1_proving_key.bin +zkutil generate-verifier -p build/circuits/$1.params -v build/circuits/${1}Verifier.sol +sed -i.bak "s/contract Verifier/contract ${1}Verifier/g" build/circuits/${1}Verifier.sol diff --git a/scripts/ganacheHelper.js b/scripts/ganacheHelper.js new file mode 100644 index 0000000..3079552 --- /dev/null +++ b/scripts/ganacheHelper.js @@ -0,0 +1,55 @@ +// This module is used only for tests +function send(method, params = []) { + return new Promise((resolve, reject) => { + // eslint-disable-next-line no-undef + web3.currentProvider.send( + { + jsonrpc: '2.0', + id: Date.now(), + method, + params, + }, + (err, res) => { + return err ? reject(err) : resolve(res) + }, + ) + }) +} + +const takeSnapshot = async () => { + return await send('evm_snapshot') +} + +const traceTransaction = async (tx) => { + return await send('debug_traceTransaction', [tx, {}]) +} + +const revertSnapshot = async (id) => { + await send('evm_revert', [id]) +} + +const mineBlock = async (timestamp) => { + await send('evm_mine', [timestamp]) +} + +const increaseTime = async (seconds) => { + await send('evm_increaseTime', [seconds]) +} + +const minerStop = async () => { + await send('miner_stop', []) +} + +const minerStart = async () => { + await send('miner_start', []) +} + +module.exports = { + takeSnapshot, + revertSnapshot, + mineBlock, + minerStop, + minerStart, + increaseTime, + traceTransaction, +} diff --git a/src/account.js b/src/account.js new file mode 100644 index 0000000..db9f8a1 --- /dev/null +++ b/src/account.js @@ -0,0 +1,39 @@ +const { toBN } = require('web3-utils') +const { encrypt, decrypt } = require('eth-sig-util') +const { randomBN, poseidonHash } = require('./utils') + +class Account { + constructor({ amount, secret, nullifier } = {}) { + this.amount = amount ? toBN(amount) : toBN('0') + this.secret = secret ? toBN(secret) : randomBN(31) + this.nullifier = nullifier ? toBN(nullifier) : randomBN(31) + + this.commitment = poseidonHash([this.amount, this.secret, this.nullifier]) + this.nullifierHash = poseidonHash([this.nullifier]) + + if (this.amount.lt(toBN(0))) { + throw new Error('Cannot create an account with negative amount') + } + } + + encrypt(pubkey) { + const bytes = Buffer.concat([ + this.amount.toBuffer('be', 31), + this.secret.toBuffer('be', 31), + this.nullifier.toBuffer('be', 31), + ]) + return encrypt(pubkey, { data: bytes.toString('base64') }, 'x25519-xsalsa20-poly1305') + } + + static decrypt(privkey, data) { + const decryptedMessage = decrypt(data, privkey) + const buf = Buffer.from(decryptedMessage, 'base64') + return new Account({ + amount: toBN('0x' + buf.slice(0, 31).toString('hex')), + secret: toBN('0x' + buf.slice(31, 62).toString('hex')), + nullifier: toBN('0x' + buf.slice(62, 93).toString('hex')), + }) + } +} + +module.exports = Account diff --git a/src/controller.js b/src/controller.js new file mode 100644 index 0000000..4e7bae2 --- /dev/null +++ b/src/controller.js @@ -0,0 +1,329 @@ +const { toBN } = require('web3-utils') +const Web3 = require('web3') +const { + bitsToNumber, + toFixedHex, + poseidonHash, + poseidonHash2, + getExtRewardArgsHash, + getExtWithdrawArgsHash, + packEncryptedMessage, + RewardArgs, +} = require('./utils') +const Account = require('./account') +const MerkleTree = require('fixed-merkle-tree') +const websnarkUtils = require('websnark/src/utils') +const buildGroth16 = require('websnark/src/groth16') + +const web3 = new Web3() + +class Controller { + constructor({ contract, tornadoTreesContract, merkleTreeHeight, provingKeys, groth16 }) { + this.merkleTreeHeight = Number(merkleTreeHeight) + this.provingKeys = provingKeys + this.contract = contract + this.tornadoTreesContract = tornadoTreesContract + this.groth16 = groth16 + } + + async init() { + this.groth16 = await buildGroth16() + } + + async _fetchAccountCommitments() { + const events = await this.contract.getPastEvents('NewAccount', { + fromBlock: 0, + toBlock: 'latest', + }) + return events + .sort((a, b) => a.returnValues.index - b.returnValues.index) + .map((e) => toBN(e.returnValues.commitment)) + } + + _fetchDepositDataEvents() { + return this._fetchEvents('DepositData') + } + + _fetchWithdrawalDataEvents() { + return this._fetchEvents('WithdrawalData') + } + + async _fetchEvents(eventName) { + const events = await this.tornadoTreesContract.getPastEvents(eventName, { + fromBlock: 0, + toBlock: 'latest', + }) + return events + .sort((a, b) => a.returnValues.index - b.returnValues.index) + .map((e) => ({ + instance: toFixedHex(e.returnValues.instance, 20), + hash: toFixedHex(e.returnValues.hash), + block: Number(e.returnValues.block), + index: Number(e.returnValues.index), + })) + } + + _updateTree(tree, element) { + const oldRoot = tree.root() + tree.insert(element) + const newRoot = tree.root() + const { pathElements, pathIndices } = tree.path(tree.elements().length - 1) + return { + oldRoot, + newRoot, + pathElements, + pathIndices: bitsToNumber(pathIndices), + } + } + + async batchReward({ account, notes, publicKey, fee = 0, relayer = 0 }) { + const accountCommitments = await this._fetchAccountCommitments() + let lastAccount = account + const proofs = [] + for (const note of notes) { + const proof = await this.reward({ + account: lastAccount, + note, + publicKey, + fee, + relayer, + accountCommitments: accountCommitments.slice(), + }) + proofs.push(proof) + lastAccount = proof.account + accountCommitments.push(lastAccount.commitment) + } + const args = proofs.map((x) => web3.eth.abi.encodeParameters(['bytes', RewardArgs], [x.proof, x.args])) + return { proofs, args } + } + + async reward({ account, note, publicKey, fee = 0, relayer = 0, accountCommitments = null }) { + const rate = await this.contract.methods.rates(note.instance).call() + + const newAmount = account.amount.add( + toBN(rate) + .mul(toBN(note.withdrawalBlock).sub(toBN(note.depositBlock))) + .sub(toBN(fee)), + ) + const newAccount = new Account({ amount: newAmount }) + + const depositDataEvents = await this._fetchDepositDataEvents() + const depositLeaves = depositDataEvents.map((x) => poseidonHash([x.instance, x.hash, x.block])) + const depositTree = new MerkleTree(this.merkleTreeHeight, depositLeaves, { hashFunction: poseidonHash2 }) + const depositItem = depositDataEvents.filter((x) => x.hash === toFixedHex(note.commitment)) + if (depositItem.length === 0) { + throw new Error('The deposits tree does not contain such note commitment') + } + const depositPath = depositTree.path(depositItem[0].index) + + const withdrawalDataEvents = await this._fetchWithdrawalDataEvents() + const withdrawalLeaves = withdrawalDataEvents.map((x) => poseidonHash([x.instance, x.hash, x.block])) + const withdrawalTree = new MerkleTree(this.merkleTreeHeight, withdrawalLeaves, { + hashFunction: poseidonHash2, + }) + const withdrawalItem = withdrawalDataEvents.filter((x) => x.hash === toFixedHex(note.nullifierHash)) + if (withdrawalItem.length === 0) { + throw new Error('The withdrawals tree does not contain such note nullifier') + } + const withdrawalPath = withdrawalTree.path(withdrawalItem[0].index) + + accountCommitments = accountCommitments || (await this._fetchAccountCommitments()) + const accountTree = new MerkleTree(this.merkleTreeHeight, accountCommitments, { + hashFunction: poseidonHash2, + }) + const zeroAccount = { + pathElements: new Array(this.merkleTreeHeight).fill(0), + pathIndices: new Array(this.merkleTreeHeight).fill(0), + } + const accountIndex = accountTree.indexOf(account.commitment, (a, b) => a.eq(b)) + const accountPath = accountIndex !== -1 ? accountTree.path(accountIndex) : zeroAccount + const accountTreeUpdate = this._updateTree(accountTree, newAccount.commitment) + + const encryptedAccount = packEncryptedMessage(newAccount.encrypt(publicKey)) + const extDataHash = getExtRewardArgsHash({ relayer, encryptedAccount }) + + const input = { + rate, + fee, + instance: note.instance, + rewardNullifier: note.rewardNullifier, + extDataHash, + + noteSecret: note.secret, + noteNullifier: note.nullifier, + + inputAmount: account.amount, + inputSecret: account.secret, + inputNullifier: account.nullifier, + inputRoot: accountTreeUpdate.oldRoot, + inputPathElements: accountPath.pathElements, + inputPathIndices: bitsToNumber(accountPath.pathIndices), + inputNullifierHash: account.nullifierHash, + + outputAmount: newAccount.amount, + outputSecret: newAccount.secret, + outputNullifier: newAccount.nullifier, + outputRoot: accountTreeUpdate.newRoot, + outputPathIndices: accountTreeUpdate.pathIndices, + outputPathElements: accountTreeUpdate.pathElements, + outputCommitment: newAccount.commitment, + + depositBlock: note.depositBlock, + depositRoot: depositTree.root(), + depositPathIndices: bitsToNumber(depositPath.pathIndices), + depositPathElements: depositPath.pathElements, + + withdrawalBlock: note.withdrawalBlock, + withdrawalRoot: withdrawalTree.root(), + withdrawalPathIndices: bitsToNumber(withdrawalPath.pathIndices), + withdrawalPathElements: withdrawalPath.pathElements, + } + + const proofData = await websnarkUtils.genWitnessAndProve( + this.groth16, + input, + this.provingKeys.rewardCircuit, + this.provingKeys.rewardProvingKey, + ) + const { proof } = websnarkUtils.toSolidityInput(proofData) + + const args = { + rate: toFixedHex(input.rate), + fee: toFixedHex(input.fee), + instance: toFixedHex(input.instance, 20), + rewardNullifier: toFixedHex(input.rewardNullifier), + extDataHash: toFixedHex(input.extDataHash), + depositRoot: toFixedHex(input.depositRoot), + withdrawalRoot: toFixedHex(input.withdrawalRoot), + extData: { + relayer: toFixedHex(relayer, 20), + encryptedAccount, + }, + account: { + inputRoot: toFixedHex(input.inputRoot), + inputNullifierHash: toFixedHex(input.inputNullifierHash), + outputRoot: toFixedHex(input.outputRoot), + outputPathIndices: toFixedHex(input.outputPathIndices), + outputCommitment: toFixedHex(input.outputCommitment), + }, + } + + return { + proof, + args, + account: newAccount, + } + } + + async withdraw({ account, amount, recipient, publicKey, fee = 0, relayer = 0 }) { + const newAmount = account.amount.sub(toBN(amount)).sub(toBN(fee)) + const newAccount = new Account({ amount: newAmount }) + + const accountCommitments = await this._fetchAccountCommitments() + const accountTree = new MerkleTree(this.merkleTreeHeight, accountCommitments, { + hashFunction: poseidonHash2, + }) + const accountIndex = accountTree.indexOf(account.commitment, (a, b) => a.eq(b)) + if (accountIndex === -1) { + throw new Error('The accounts tree does not contain such account commitment') + } + const accountPath = accountTree.path(accountIndex) + const accountTreeUpdate = this._updateTree(accountTree, newAccount.commitment) + + const encryptedAccount = packEncryptedMessage(newAccount.encrypt(publicKey)) + const extDataHash = getExtWithdrawArgsHash({ fee, recipient, relayer, encryptedAccount }) + + const input = { + amount: toBN(amount).add(toBN(fee)), + extDataHash, + + inputAmount: account.amount, + inputSecret: account.secret, + inputNullifier: account.nullifier, + inputNullifierHash: account.nullifierHash, + inputRoot: accountTreeUpdate.oldRoot, + inputPathIndices: bitsToNumber(accountPath.pathIndices), + inputPathElements: accountPath.pathElements, + + outputAmount: newAccount.amount, + outputSecret: newAccount.secret, + outputNullifier: newAccount.nullifier, + outputRoot: accountTreeUpdate.newRoot, + outputPathIndices: accountTreeUpdate.pathIndices, + outputPathElements: accountTreeUpdate.pathElements, + outputCommitment: newAccount.commitment, + } + + const proofData = await websnarkUtils.genWitnessAndProve( + this.groth16, + input, + this.provingKeys.withdrawCircuit, + this.provingKeys.withdrawProvingKey, + ) + const { proof } = websnarkUtils.toSolidityInput(proofData) + + const args = { + amount: toFixedHex(input.amount), + extDataHash: toFixedHex(input.extDataHash), + extData: { + fee: toFixedHex(fee), + recipient: toFixedHex(recipient, 20), + relayer: toFixedHex(relayer, 20), + encryptedAccount, + }, + account: { + inputRoot: toFixedHex(input.inputRoot), + inputNullifierHash: toFixedHex(input.inputNullifierHash), + outputRoot: toFixedHex(input.outputRoot), + outputPathIndices: toFixedHex(input.outputPathIndices), + outputCommitment: toFixedHex(input.outputCommitment), + }, + } + + return { + proof, + args, + account: newAccount, + } + } + + async treeUpdate(commitment, accountTree = null) { + if (!accountTree) { + const accountCommitments = await this._fetchAccountCommitments() + accountTree = new MerkleTree(this.merkleTreeHeight, accountCommitments, { + hashFunction: poseidonHash2, + }) + } + const accountTreeUpdate = this._updateTree(accountTree, commitment) + + const input = { + oldRoot: accountTreeUpdate.oldRoot, + newRoot: accountTreeUpdate.newRoot, + leaf: commitment, + pathIndices: accountTreeUpdate.pathIndices, + pathElements: accountTreeUpdate.pathElements, + } + + const proofData = await websnarkUtils.genWitnessAndProve( + this.groth16, + input, + this.provingKeys.treeUpdateCircuit, + this.provingKeys.treeUpdateProvingKey, + ) + const { proof } = websnarkUtils.toSolidityInput(proofData) + + const args = { + oldRoot: toFixedHex(input.oldRoot), + newRoot: toFixedHex(input.newRoot), + leaf: toFixedHex(input.leaf), + pathIndices: toFixedHex(input.pathIndices), + } + + return { + proof, + args, + } + } +} + +module.exports = Controller diff --git a/src/note.js b/src/note.js new file mode 100644 index 0000000..c9f2f43 --- /dev/null +++ b/src/note.js @@ -0,0 +1,46 @@ +const { toBN, BN } = require('web3-utils') +const { randomBN, pedersenHashBuffer, poseidonHash } = require('./utils') + +class Note { + constructor({ secret, nullifier, netId, amount, currency, depositBlock, withdrawalBlock, instance } = {}) { + this.secret = secret ? toBN(secret) : randomBN(31) + this.nullifier = nullifier ? toBN(nullifier) : randomBN(31) + + this.commitment = pedersenHashBuffer( + Buffer.concat([this.nullifier.toBuffer('le', 31), this.secret.toBuffer('le', 31)]), + ) + this.nullifierHash = pedersenHashBuffer(this.nullifier.toBuffer('le', 31)) + this.rewardNullifier = poseidonHash([this.nullifier]) + + this.netId = netId + this.amount = amount + this.currency = currency + this.depositBlock = toBN(depositBlock) + this.withdrawalBlock = toBN(withdrawalBlock) + this.instance = instance || Note.getInstance(currency, amount) + } + + static getInstance(/* currency, amount */) { + // todo + } + + static fromString(note, instance, depositBlock, withdrawalBlock) { + note = note.split('-') + const [, currency, amount, netId] = note + const hexNote = note[4].slice(2) + const nullifier = new BN(hexNote.slice(0, 62), 16, 'le') + const secret = new BN(hexNote.slice(62), 16, 'le') + return new Note({ + secret, + nullifier, + netId, + amount, + currency, + depositBlock, + withdrawalBlock, + instance, + }) + } +} + +module.exports = Note diff --git a/src/utils.js b/src/utils.js new file mode 100644 index 0000000..f013411 --- /dev/null +++ b/src/utils.js @@ -0,0 +1,165 @@ +const crypto = require('crypto') +const Decimal = require('decimal.js') +const { bigInt } = require('snarkjs') +const { toBN, soliditySha3 } = require('web3-utils') +const Web3 = require('web3') +const web3 = new Web3() +const { babyJub, pedersenHash, mimcsponge, poseidon } = require('circomlib') + +const RewardExtData = { + RewardExtData: { + relayer: 'address', + encryptedAccount: 'bytes', + }, +} +const AccountUpdate = { + AccountUpdate: { + inputRoot: 'bytes32', + inputNullifierHash: 'bytes32', + outputRoot: 'bytes32', + outputPathIndices: 'uint256', + outputCommitment: 'bytes32', + }, +} +const RewardArgs = { + RewardArgs: { + rate: 'uint256', + fee: 'uint256', + instance: 'address', + rewardNullifier: 'bytes32', + extDataHash: 'bytes32', + depositRoot: 'bytes32', + withdrawalRoot: 'bytes32', + extData: RewardExtData.RewardExtData, + account: AccountUpdate.AccountUpdate, + }, +} + +const WithdrawExtData = { + WithdrawExtData: { + fee: 'uint256', + recipient: 'address', + relayer: 'address', + encryptedAccount: 'bytes', + }, +} + +const pedersenHashBuffer = (buffer) => toBN(babyJub.unpackPoint(pedersenHash.hash(buffer))[0].toString()) + +const mimcHash = (items) => toBN(mimcsponge.multiHash(items.map((item) => bigInt(item))).toString()) + +const poseidonHash = (items) => toBN(poseidon(items).toString()) + +const poseidonHash2 = (a, b) => poseidonHash([a, b]) + +/** Generate random number of specified byte length */ +const randomBN = (nbytes = 31) => toBN(bigInt.leBuff2int(crypto.randomBytes(nbytes)).toString()) + +/** BigNumber to hex string of specified length */ +const toFixedHex = (number, length = 32) => + '0x' + + (number instanceof Buffer ? number.toString('hex') : bigInt(number).toString(16)).padStart(length * 2, '0') + +function getExtRewardArgsHash({ relayer, encryptedAccount }) { + const encodedData = web3.eth.abi.encodeParameters( + [RewardExtData], + [{ relayer: toFixedHex(relayer, 20), encryptedAccount }], + ) + const hash = soliditySha3({ t: 'bytes', v: encodedData }) + return '0x00' + hash.slice(4) // cut last byte to make it 31 byte long to fit the snark field +} + +function getExtWithdrawArgsHash({ fee, recipient, relayer, encryptedAccount }) { + const encodedData = web3.eth.abi.encodeParameters( + [WithdrawExtData], + [ + { + fee: toFixedHex(fee, 32), + recipient: toFixedHex(recipient, 20), + relayer: toFixedHex(relayer, 20), + encryptedAccount, + }, + ], + ) + const hash = soliditySha3({ t: 'bytes', v: encodedData }) + return '0x00' + hash.slice(4) // cut first byte to make it 31 byte long to fit the snark field +} + +function packEncryptedMessage(encryptedMessage) { + const nonceBuf = Buffer.from(encryptedMessage.nonce, 'base64') + const ephemPublicKeyBuf = Buffer.from(encryptedMessage.ephemPublicKey, 'base64') + const ciphertextBuf = Buffer.from(encryptedMessage.ciphertext, 'base64') + const messageBuff = Buffer.concat([ + Buffer.alloc(24 - nonceBuf.length), + nonceBuf, + Buffer.alloc(32 - ephemPublicKeyBuf.length), + ephemPublicKeyBuf, + ciphertextBuf, + ]) + return '0x' + messageBuff.toString('hex') +} + +function unpackEncryptedMessage(encryptedMessage) { + if (encryptedMessage.slice(0, 2) === '0x') { + encryptedMessage = encryptedMessage.slice(2) + } + const messageBuff = Buffer.from(encryptedMessage, 'hex') + const nonceBuf = messageBuff.slice(0, 24) + const ephemPublicKeyBuf = messageBuff.slice(24, 56) + const ciphertextBuf = messageBuff.slice(56) + return { + version: 'x25519-xsalsa20-poly1305', + nonce: nonceBuf.toString('base64'), + ephemPublicKey: ephemPublicKeyBuf.toString('base64'), + ciphertext: ciphertextBuf.toString('base64'), + } +} + +function bitsToNumber(bits) { + let result = 0 + for (const item of bits.slice().reverse()) { + result = (result << 1) + item + } + return result +} + +// a = floor(10**18 * e^(-0.0000000001 * amount)) +// yield = BalBefore - (BalBefore * a)/10**18 +function tornadoFormula({ balance, amount, poolWeight = 1e10 }) { + const decimals = new Decimal(10 ** 18) + balance = new Decimal(balance.toString()) + amount = new Decimal(amount.toString()) + poolWeight = new Decimal(poolWeight.toString()) + + const power = amount.div(poolWeight).negated() + const exponent = Decimal.exp(power).mul(decimals) + const newBalance = balance.mul(exponent).div(decimals) + return toBN(balance.sub(newBalance).toFixed(0)) +} + +function reverseTornadoFormula({ balance, tokens, poolWeight = 1e10 }) { + balance = new Decimal(balance.toString()) + tokens = new Decimal(tokens.toString()) + poolWeight = new Decimal(poolWeight.toString()) + + return toBN(poolWeight.times(Decimal.ln(balance.div(balance.sub(tokens)))).toFixed(0)) +} + +module.exports = { + randomBN, + pedersenHashBuffer, + bitsToNumber, + getExtRewardArgsHash, + getExtWithdrawArgsHash, + packEncryptedMessage, + unpackEncryptedMessage, + toFixedHex, + mimcHash, + poseidonHash, + poseidonHash2, + tornadoFormula, + reverseTornadoFormula, + RewardArgs, + RewardExtData, + AccountUpdate, +} diff --git a/test/merkleTree.test.js b/test/merkleTree.test.js new file mode 100644 index 0000000..817cf4c --- /dev/null +++ b/test/merkleTree.test.js @@ -0,0 +1,107 @@ +/* global artifacts, web3, contract */ +require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-promised')).should() + +const { takeSnapshot, revertSnapshot } = require('../scripts/ganacheHelper') +const { toFixedHex, randomBN } = require('../src/utils') +const MerkleTree = artifacts.require('MerkleTreeWithHistoryMock') +const Hasher = artifacts.require('Hasher2') + +const levels = 16 + +contract('MerkleTree', () => { + let tree1 + let tree2 + let snapshotId + let hasher + + before(async () => { + hasher = await Hasher.new() + tree1 = await MerkleTree.new(levels, hasher.address) + tree2 = await MerkleTree.new(levels, hasher.address) + snapshotId = await takeSnapshot() + }) + + describe('#tree', () => { + it('should bulk insert', async () => { + const elements = ['123', '456', '789'].map((e) => toFixedHex(e)) + + await tree1.bulkInsert(elements) + for (const e of elements) { + await tree2.insert(e) + } + + const root1 = await tree1.getLastRoot() + const root2 = await tree2.getLastRoot() + + root1.should.be.equal(root2) + }) + + it('almost full tree', async () => { + let tree = await MerkleTree.new(3, hasher.address) + let elements = ['1', '2', '3', '4', '5', '6', '7'].map((e) => toFixedHex(e)) + await tree.bulkInsert(elements) + + tree = await MerkleTree.new(3, hasher.address) + elements = ['1', '2', '3', '4', '5', '6', '7', '8'].map((e) => toFixedHex(e)) + await tree.bulkInsert(elements) + + tree = await MerkleTree.new(3, hasher.address) + elements = ['1', '2', '3', '4', '5', '6', '7', '8', '9'].map((e) => toFixedHex(e)) + // prettier-ignore + await tree + .bulkInsert(elements) + .should.be.rejectedWith('Merkle doesn\'t have enough capacity to add specified leaves') + }) + + // it('estimate gas hasher', async () => { + // const gas = await tree1.test() // hasher.contract.methods.poseidon([1, 2]).estimateGas() + // console.log('gas', gas.toString()) + // }) + + it('should bulk insert with initial state', async () => { + const initElements = [123, 456, 789].map((e) => toFixedHex(e)) + const elements = [12, 34, 56, 78, 90].map((e) => toFixedHex(e)) + + for (const e of initElements) { + await tree1.insert(e) + await tree2.insert(e) + } + + await tree1.bulkInsert(elements) + for (const e of elements) { + await tree2.insert(e) + } + + const root1 = await tree1.getLastRoot() + const root2 = await tree2.getLastRoot() + + root1.should.be.equal(root2) + }) + + it.skip('should pass the stress test', async () => { + const rounds = 40 + const elementCount = 10 + + for (let i = 0; i < rounds; i++) { + const length = 1 + Math.floor(Math.random() * elementCount) + const elements = Array.from({ length }, () => randomBN()).map((e) => toFixedHex(e)) + + await tree1.bulkInsert(elements) + for (const e of elements) { + await tree2.insert(e) + } + + const root1 = await tree1.getLastRoot() + const root2 = await tree2.getLastRoot() + + root1.should.be.equal(root2) + } + }) + }) + + afterEach(async () => { + await revertSnapshot(snapshotId.result) + // eslint-disable-next-line require-atomic-updates + snapshotId = await takeSnapshot() + }) +}) diff --git a/test/miner.test.js b/test/miner.test.js new file mode 100644 index 0000000..4dc0eb6 --- /dev/null +++ b/test/miner.test.js @@ -0,0 +1,863 @@ +/* global artifacts, web3, contract */ +require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-promised')).should() + +const fs = require('fs') +const { toBN } = require('web3-utils') +const { takeSnapshot, revertSnapshot, mineBlock } = require('../scripts/ganacheHelper') +const tornConfig = require('torn-token') +const RLP = require('rlp') +const Controller = require('../src/controller') +const Account = require('../src/account') +const Note = require('../src/note') +const { + toFixedHex, + poseidonHash2, + packEncryptedMessage, + unpackEncryptedMessage, + getExtWithdrawArgsHash, +} = require('../src/utils') +const { getEncryptionPublicKey } = require('eth-sig-util') +const Miner = artifacts.require('MinerMock') +const TornadoTrees = artifacts.require('TornadoTreesMock') +const Torn = artifacts.require('TORNMock') +const RewardSwap = artifacts.require('RewardSwapMock') +const RewardVerifier = artifacts.require('RewardVerifier') +const WithdrawVerifier = artifacts.require('WithdrawVerifier') +const TreeUpdateVerifier = artifacts.require('TreeUpdateVerifier') +const provingKeys = { + rewardCircuit: require('../build/circuits/Reward.json'), + withdrawCircuit: require('../build/circuits/Withdraw.json'), + treeUpdateCircuit: require('../build/circuits/TreeUpdate.json'), + rewardProvingKey: fs.readFileSync('./build/circuits/Reward_proving_key.bin').buffer, + withdrawProvingKey: fs.readFileSync('./build/circuits/Withdraw_proving_key.bin').buffer, + treeUpdateProvingKey: fs.readFileSync('./build/circuits/TreeUpdate_proving_key.bin').buffer, +} +const MerkleTree = require('fixed-merkle-tree') +const Hasher2 = artifacts.require('Hasher2') +const Hasher3 = artifacts.require('Hasher3') + +const { MERKLE_TREE_HEIGHT } = process.env + +// Set time to beginning of a second +async function timeReset() { + const delay = 1000 - new Date().getMilliseconds() + await new Promise((resolve) => setTimeout(resolve, delay)) + await mineBlock() +} + +async function getNextAddr(sender, offset = 0) { + const nonce = await web3.eth.getTransactionCount(sender) + return ( + '0x' + + web3.utils + .sha3(RLP.encode([sender, Number(nonce) + Number(offset)])) + .slice(12) + .substring(14) + ) +} + +async function registerNote(note, tornadoTrees) { + await tornadoTrees.setBlockNumber(note.depositBlock) + await tornadoTrees.registerDeposit(note.instance, toFixedHex(note.commitment)) + + await tornadoTrees.setBlockNumber(note.withdrawalBlock) + await tornadoTrees.registerWithdrawal(note.instance, toFixedHex(note.nullifierHash)) + + return { + depositLeaf: { + instance: note.instance, + hash: toFixedHex(note.commitment), + block: toFixedHex(note.depositBlock), + }, + withdrawalLeaf: { + instance: note.instance, + hash: toFixedHex(note.nullifierHash), + block: toFixedHex(note.withdrawalBlock), + }, + } +} + +contract('Miner', (accounts) => { + let miner + let torn + let rewardSwap + let tornadoTrees + const tornado = '0x3535249DFBb73e21c2aCDC6e42796d920A0379b7' + const tornCap = toBN(tornConfig.torn.cap) + const miningCap = toBN(tornConfig.torn.distribution.miningV2.amount) + const initialTornBalance = toBN(tornConfig.miningV2.initialBalance) + const RATE = toBN(10) + const amount = toBN(15) + // eslint-disable-next-line no-unused-vars + const sender = accounts[0] + const recipient = accounts[1] + // eslint-disable-next-line no-unused-vars + const relayer = accounts[2] + const levels = MERKLE_TREE_HEIGHT || 20 + let snapshotId + const AnotherWeb3 = require('web3') + let contract + let controller + const note1 = new Note({ + instance: tornado, + depositBlock: 10, + withdrawalBlock: 10 + 4 * 60 * 24, + }) + const note2 = new Note({ + instance: tornado, + depositBlock: 10, + withdrawalBlock: 10 + 2 * 4 * 60 * 24, + }) + const note3 = new Note({ + instance: tornado, + depositBlock: 10, + withdrawalBlock: 10 + 3 * 4 * 60 * 24, + }) + const note = note1 + const notes = [note1, note2, note3] + + const emptyTree = new MerkleTree(levels, [], { hashFunction: poseidonHash2 }) + const privateKey = web3.eth.accounts.create().privateKey.slice(2) + const publicKey = getEncryptionPublicKey(privateKey) + const operator = accounts[0] + const thirtyDays = 30 * 24 * 3600 + const poolWeight = 1e11 + const governance = accounts[9] + + before(async () => { + const rewardVerifier = await RewardVerifier.new() + const withdrawVerifier = await WithdrawVerifier.new() + const treeUpdateVerifier = await TreeUpdateVerifier.new() + const hasher2 = await Hasher2.new() + const hasher3 = await Hasher3.new() + tornadoTrees = await TornadoTrees.new(operator, hasher2.address, hasher3.address, levels) + const swapExpectedAddr = await getNextAddr(accounts[0], 1) + const minerExpectedAddr = await getNextAddr(accounts[0], 2) + torn = await Torn.new(sender, thirtyDays, [ + { to: swapExpectedAddr, amount: miningCap.toString() }, + { to: sender, amount: tornCap.sub(miningCap).toString() }, + ]) + rewardSwap = await RewardSwap.new( + torn.address, + minerExpectedAddr, + miningCap.toString(), + initialTornBalance.toString(), + poolWeight, + ) + miner = await Miner.new( + rewardSwap.address, + governance, + tornadoTrees.address, + [rewardVerifier.address, withdrawVerifier.address, treeUpdateVerifier.address], + toFixedHex(emptyTree.root()), + [{ instance: tornado, value: RATE.toString() }], + ) + + const depositData = [] + const withdrawalData = [] + for (const note of notes) { + const { depositLeaf, withdrawalLeaf } = await registerNote(note, tornadoTrees) + depositData.push(depositLeaf) + withdrawalData.push(withdrawalLeaf) + } + + await tornadoTrees.updateRoots(depositData, withdrawalData) + + const anotherWeb3 = new AnotherWeb3(web3.currentProvider) + contract = new anotherWeb3.eth.Contract(miner.abi, miner.address) + const tornadoTreesContract = new anotherWeb3.eth.Contract(tornadoTrees.abi, tornadoTrees.address) + controller = new Controller({ + contract, + tornadoTreesContract, + merkleTreeHeight: levels, + provingKeys, + }) + await controller.init() + snapshotId = await takeSnapshot() + }) + + beforeEach(async () => { + await timeReset() + }) + + describe('#constructor', () => { + it('should initialize', async () => { + const tokenFromContract = await rewardSwap.torn() + tokenFromContract.should.be.equal(torn.address) + + const rewardSwapFromContract = await miner.rewardSwap() + rewardSwapFromContract.should.be.equal(rewardSwap.address) + + const rateFromContract = await miner.rates(tornado) + rateFromContract.should.be.eq.BN(RATE) + }) + }) + + describe('#Note.fromString()', () => { + it('should work', () => { + const note = Note.fromString( + 'tornado-eth-1-1-0x3a1f1e0e10b22b15ed8208bc810dd5564d564fd7930874db4d7d58870deb72978fb5fccae2f1554cac71e2cff85f9c8908295647adf2b443a4dd93635d8d', + '0x8b3f5393bA08c24cc7ff5A66a832562aAB7bC95f', + 10, + 15, + ) + note.secret.should.be.eq.BN(toBN('0x8d5d6393dda443b4f2ad47562908899c5ff8cfe271ac4c55f1e2cafcb58f97')) + note.nullifier.should.be.eq.BN(toBN('0x72eb0d87587d4ddb740893d74f564d56d50d81bc0882ed152bb2100e1e1f3a')) + note.nullifierHash.should.be.eq.BN( + toBN('0x33403728f37e70a275acac2eb8297a3231698f9003838ec4cd7115ee2693943'), + ) + note.commitment.should.be.eq.BN( + toBN('0x1a08fd10dae9806ce25b62582e44d237c1cb9f8d6bf73e756f18d0e5d7a7351a'), + ) + }) + }) + + describe('#Account', () => { + it('should throw on negative amount', () => { + ;(() => new Account({ amount: toBN(-1) })).should.throw('Cannot create an account with negative amount') + }) + }) + + describe('#encrypt', () => { + it('should work', () => { + const account = new Account() + const encryptedAccount = account.encrypt(publicKey) + const encryptedMessage = packEncryptedMessage(encryptedAccount) + const unpackedMessage = unpackEncryptedMessage(encryptedMessage) + const account2 = Account.decrypt(privateKey, unpackedMessage) + + account.amount.should.be.eq.BN(account2.amount) + account.secret.should.be.eq.BN(account2.secret) + account.nullifier.should.be.eq.BN(account2.nullifier) + account.commitment.should.be.eq.BN(account2.commitment) + }) + }) + + describe('#reward', () => { + it('should work', async () => { + const zeroAccount = new Account() + const accountCount = await miner.accountCount() + + zeroAccount.amount.should.be.eq.BN(toBN(0)) + + const rewardNullifierBefore = await miner.rewardNullifiers(toFixedHex(note.rewardNullifier)) + rewardNullifierBefore.should.be.false + const accountNullifierBefore = await miner.accountNullifiers(toFixedHex(zeroAccount.nullifier)) + accountNullifierBefore.should.be.false + + const { proof, args, account } = await controller.reward({ account: zeroAccount, note, publicKey }) + const { logs } = await miner.reward(proof, args) + logs[0].event.should.be.equal('NewAccount') + logs[0].args.commitment.should.be.equal(toFixedHex(account.commitment)) + logs[0].args.index.should.be.eq.BN(accountCount) + + logs[0].args.nullifier.should.be.equal(toFixedHex(zeroAccount.nullifierHash)) + + const encryptedAccount = logs[0].args.encryptedAccount + const account2 = Account.decrypt(privateKey, unpackEncryptedMessage(encryptedAccount)) + account.amount.should.be.eq.BN(account2.amount) + account.secret.should.be.eq.BN(account2.secret) + account.nullifier.should.be.eq.BN(account2.nullifier) + account.commitment.should.be.eq.BN(account2.commitment) + + const accountCountAfter = await miner.accountCount() + accountCountAfter.should.be.eq.BN(accountCount.add(toBN(1))) + const rootAfter = await miner.getLastAccountRoot() + rootAfter.should.be.equal(args.account.outputRoot) + const rewardNullifierAfter = await miner.rewardNullifiers(toFixedHex(note.rewardNullifier)) + rewardNullifierAfter.should.be.true + const accountNullifierAfter = await miner.accountNullifiers(toFixedHex(zeroAccount.nullifierHash)) + accountNullifierAfter.should.be.true + + account.amount.should.be.eq.BN(toBN(note.withdrawalBlock - note.depositBlock).mul(RATE)) + }) + + it('should send fee to relayer', async () => { + const fee = toBN(3) + const amount = toBN(44) + const delta = toBN('10000') // max floating point error + + const claim = await controller.reward({ account: new Account(), note, publicKey, relayer, fee }) + await timeReset() + let expectedFeeInTorn = await rewardSwap.getExpectedReturn(fee) + let relayerBalanceBefore = await torn.balanceOf(relayer) + await miner.reward(claim.proof, claim.args) + let relayerBalanceAfter = await torn.balanceOf(relayer) + relayerBalanceAfter.should.be.eq.BN(relayerBalanceBefore.add(expectedFeeInTorn)) + + const withdrawal = await controller.withdraw({ + account: claim.account, + amount, + recipient, + publicKey, + relayer, + fee, + }) + await timeReset() + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + expectedFeeInTorn = await rewardSwap.getExpectedReturn(amount.add(fee)) + expectedFeeInTorn = expectedFeeInTorn.sub(expectedAmountInTorn) + + relayerBalanceBefore = await torn.balanceOf(relayer) + const recipientBalanceBefore = await torn.balanceOf(recipient) + await miner.withdraw(withdrawal.proof, withdrawal.args) + const recipientBalanceAfter = await torn.balanceOf(recipient) + relayerBalanceAfter = await torn.balanceOf(relayer) + + recipientBalanceAfter.should.be.eq.BN(recipientBalanceBefore.add(expectedAmountInTorn)) + relayerBalanceAfter.sub(relayerBalanceBefore).sub(expectedFeeInTorn).should.be.lt.BN(delta) + }) + + it('should use fallback with outdated tree', async () => { + const { proof, args, account } = await controller.reward({ account: new Account(), note, publicKey }) + + const tmp = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmp.proof, tmp.args) + + await miner.reward(proof, args).should.be.rejectedWith('Outdated account merkle root') + + const update = await controller.treeUpdate(account.commitment) + await miner.reward(proof, args, update.proof, update.args) + + const rootAfter = await miner.getLastAccountRoot() + rootAfter.should.be.equal(update.args.newRoot) + }) + + it('should reject with incorrect insert position', async () => { + const tmp = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmp.proof, tmp.args) + + const { proof, args } = await controller.reward({ account: new Account(), note, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + let fakeIndex = toBN(args.account.outputPathIndices).sub(toBN('1')) + malformedArgs.account.outputPathIndices = toFixedHex(fakeIndex) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Incorrect account insert index') + + fakeIndex = toBN(args.account.outputPathIndices).add(toBN('1')) + malformedArgs.account.outputPathIndices = toFixedHex(fakeIndex) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Incorrect account insert index') + + fakeIndex = toBN(args.account.outputPathIndices).add(toBN('10000000000000000000000000')) + malformedArgs.account.outputPathIndices = toFixedHex(fakeIndex) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Incorrect account insert index') + + await miner.reward(proof, args).should.be.fulfilled + }) + + it('should reject with incorrect external data hash', async () => { + const { proof, args } = await controller.reward({ account: new Account(), note, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.extDataHash = toFixedHex('0xdeadbeef') + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + malformedArgs.extDataHash = toFixedHex('0x00') + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + await miner.reward(proof, args).should.be.fulfilled + }) + + it('should prevent fee overflow', async () => { + const { proof, args } = await controller.reward({ account: new Account(), note, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.fee = toFixedHex(toBN(2).pow(toBN(248))) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Fee value out of range') + + malformedArgs.fee = toFixedHex(toBN(2).pow(toBN(256)).sub(toBN(1))) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Fee value out of range') + + await miner.reward(proof, args).should.be.fulfilled + }) + + it('should reject with invalid reward rate', async () => { + const { proof, args } = await controller.reward({ account: new Account(), note, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.instance = miner.address + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Invalid reward rate') + + malformedArgs.rate = toFixedHex(toBN(9999999)) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Invalid reward rate') + + malformedArgs.instance = toFixedHex('0x00', 20) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Invalid reward rate') + + const anotherInstance = accounts[5] + const rate = toBN(1000) + await miner.setRates([{ instance: anotherInstance, value: rate.toString() }], { from: governance }) + + malformedArgs.instance = anotherInstance + malformedArgs.rate = toFixedHex(rate) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Invalid reward proof') + + await miner.reward(proof, args).should.be.fulfilled + }) + + it('should reject for double spend', async () => { + let { proof, args } = await controller.reward({ account: new Account(), note, publicKey }) + await miner.reward(proof, args).should.be.fulfilled + ;({ proof, args } = await controller.reward({ account: new Account(), note, publicKey })) + await miner.reward(proof, args).should.be.rejectedWith('Reward has been already spent') + }) + + it('should reject for invalid proof', async () => { + const claim1 = await controller.reward({ account: new Account(), note, publicKey }) + const claim2 = await controller.reward({ account: new Account(), note: note2, publicKey }) + + await miner.reward(claim2.proof, claim1.args).should.be.rejectedWith('Invalid reward proof') + }) + + it('should reject for invalid account root', async () => { + const account1 = new Account() + const account2 = new Account() + const account3 = new Account() + + const fakeTree = new MerkleTree( + levels, + [account1.commitment, account2.commitment, account3.commitment], + { hashFunction: poseidonHash2 }, + ) + const { proof, args } = await controller.reward({ account: account1, note, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + malformedArgs.account.inputRoot = toFixedHex(fakeTree.root()) + await miner.reward(proof, malformedArgs).should.be.rejectedWith('Invalid account root') + }) + + it('should reject with outdated account root (treeUpdate proof validation)', async () => { + const { proof, args, account } = await controller.reward({ account: new Account(), note, publicKey }) + + const tmp = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmp.proof, tmp.args) + + await miner.reward(proof, args).should.be.rejectedWith('Outdated account merkle root') + + const update = await controller.treeUpdate(account.commitment) + + const tmp2 = await controller.reward({ account: new Account(), note: note3, publicKey }) + await miner.reward(tmp2.proof, tmp2.args) + + await miner + .reward(proof, args, update.proof, update.args) + .should.be.rejectedWith('Outdated tree update merkle root') + }) + + it('should reject for incorrect commitment (treeUpdate proof validation)', async () => { + const claim = await controller.reward({ account: new Account(), note, publicKey }) + + const tmp = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmp.proof, tmp.args) + + await miner.reward(claim.proof, claim.args).should.be.rejectedWith('Outdated account merkle root') + const anotherAccount = new Account() + const update = await controller.treeUpdate(anotherAccount.commitment) + + await miner + .reward(claim.proof, claim.args, update.proof, update.args) + .should.be.rejectedWith('Incorrect commitment inserted') + + claim.args.account.outputCommitment = update.args.leaf + await miner + .reward(claim.proof, claim.args, update.proof, update.args) + .should.be.rejectedWith('Invalid reward proof') + }) + + it('should reject for incorrect account insert index (treeUpdate proof validation)', async () => { + const { proof, args, account } = await controller.reward({ account: new Account(), note, publicKey }) + + const tmp = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmp.proof, tmp.args) + + await miner.reward(proof, args).should.be.rejectedWith('Outdated account merkle root') + + const update = await controller.treeUpdate(account.commitment) + const malformedArgs = JSON.parse(JSON.stringify(update.args)) + + let fakeIndex = toBN(update.args.pathIndices).sub(toBN('1')) + malformedArgs.pathIndices = toFixedHex(fakeIndex) + + await miner + .reward(proof, args, update.proof, malformedArgs) + .should.be.rejectedWith('Incorrect account insert index') + }) + + it('should reject for invalid tree update proof (treeUpdate proof validation)', async () => { + const { proof, args, account } = await controller.reward({ account: new Account(), note, publicKey }) + + const tmp = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmp.proof, tmp.args) + + await miner.reward(proof, args).should.be.rejectedWith('Outdated account merkle root') + + const update = await controller.treeUpdate(account.commitment) + await miner + .reward(proof, args, tmp.proof, update.args) + .should.be.rejectedWith('Invalid tree update proof') + }) + + it('should work with outdated deposit or withdrawal merkle root', async () => { + const note0 = new Note({ + instance: tornado, + depositBlock: 10, + withdrawalBlock: 55, + }) + const note4 = new Note({ + instance: tornado, + depositBlock: 10, + withdrawalBlock: 55, + }) + const note5 = new Note({ + instance: tornado, + depositBlock: 10, + withdrawalBlock: 65, + }) + + const claim1 = await controller.reward({ account: new Account(), note: note3, publicKey }) + + const note4Leaves = await registerNote(note4, tornadoTrees) + await tornadoTrees.updateRoots([note4Leaves.depositLeaf], [note4Leaves.withdrawalLeaf]) + + const claim2 = await controller.reward({ account: new Account(), note: note4, publicKey }) + + for (let i = 0; i < 9; i++) { + const note0Leaves = await registerNote(note0, tornadoTrees) + await tornadoTrees.updateRoots([note0Leaves.depositLeaf], [note0Leaves.withdrawalLeaf]) + } + + await miner.reward(claim1.proof, claim1.args).should.be.rejectedWith('Incorrect deposit tree root') + await miner.reward(claim2.proof, claim2.args).should.be.fulfilled + + const note5Leaves = await registerNote(note5, tornadoTrees) + await tornadoTrees.updateRoots([note5Leaves.depositLeaf], [note5Leaves.withdrawalLeaf]) + + const claim3 = await controller.reward({ account: new Account(), note: note5, publicKey }) + await miner.reward(claim3.proof, claim3.args).should.be.fulfilled + }) + }) + + describe('#withdraw', () => { + let proof, args, account + // prettier-ignore + beforeEach(async () => { + ({ proof, args, account } = await controller.reward({ account: new Account(), note, publicKey })) + await miner.reward(proof, args) + }) + + it('should work', async () => { + const accountNullifierBefore = await miner.accountNullifiers(toFixedHex(account.nullifierHash)) + accountNullifierBefore.should.be.false + + const accountCount = await miner.accountCount() + const withdrawSnark = await controller.withdraw({ account, amount, recipient, publicKey }) + await timeReset() + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + const balanceBefore = await torn.balanceOf(recipient) + const { logs } = await miner.withdraw(withdrawSnark.proof, withdrawSnark.args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + + const accountCountAfter = await miner.accountCount() + accountCountAfter.should.be.eq.BN(accountCount.add(toBN(1))) + const rootAfter = await miner.getLastAccountRoot() + rootAfter.should.be.equal(withdrawSnark.args.account.outputRoot) + const accountNullifierAfter = await miner.accountNullifiers(toFixedHex(account.nullifierHash)) + accountNullifierAfter.should.be.true + + logs[0].event.should.be.equal('NewAccount') + logs[0].args.commitment.should.be.equal(toFixedHex(withdrawSnark.account.commitment)) + logs[0].args.index.should.be.eq.BN(accountCount) + logs[0].args.nullifier.should.be.equal(toFixedHex(account.nullifierHash)) + + const encryptedAccount = logs[0].args.encryptedAccount + const account2 = Account.decrypt(privateKey, unpackEncryptedMessage(encryptedAccount)) + withdrawSnark.account.amount.should.be.eq.BN(account2.amount) + withdrawSnark.account.secret.should.be.eq.BN(account2.secret) + withdrawSnark.account.nullifier.should.be.eq.BN(account2.nullifier) + withdrawSnark.account.commitment.should.be.eq.BN(account2.commitment) + }) + + it('should reject for double spend', async () => { + const withdrawSnark = await controller.withdraw({ account, amount, recipient, publicKey }) + await timeReset() + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(withdrawSnark.proof, withdrawSnark.args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + + await miner + .withdraw(withdrawSnark.proof, withdrawSnark.args) + .should.be.rejectedWith('Outdated account state') + }) + + it('should reject with incorrect insert position', async () => { + const { proof, args } = await controller.withdraw({ account, amount, recipient, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + let fakeIndex = toBN(args.account.outputPathIndices).sub(toBN('1')) + malformedArgs.account.outputPathIndices = toFixedHex(fakeIndex) + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect account insert index') + + fakeIndex = toBN(args.account.outputPathIndices).add(toBN('1')) + malformedArgs.account.outputPathIndices = toFixedHex(fakeIndex) + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect account insert index') + + fakeIndex = toBN(args.account.outputPathIndices).add(toBN('10000000000000000000000000')) + malformedArgs.account.outputPathIndices = toFixedHex(fakeIndex) + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect account insert index') + + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(proof, args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + }) + + it('should reject with incorrect external data hash', async () => { + const { proof, args } = await controller.withdraw({ account, amount, recipient, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.extDataHash = toFixedHex('0xdeadbeef') + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + malformedArgs.extDataHash = toFixedHex('0x00') + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(proof, args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + }) + + it('should reject for amount overflow', async () => { + const { proof, args } = await controller.withdraw({ account, amount, recipient, publicKey }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.amount = toFixedHex(toBN(2).pow(toBN(248))) + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Amount value out of range') + + malformedArgs.amount = toFixedHex(toBN(2).pow(toBN(256)).sub(toBN(1))) + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Amount value out of range') + + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(proof, args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + }) + + it('should reject for fee overflow', async () => { + const fee = account.amount.add(toBN(5)) + const fakeAmount = toBN(-5) + const { proof, args } = await controller.withdraw({ + account, + amount: fakeAmount, + recipient, + publicKey, + fee, + }) + await miner.withdraw(proof, args).should.be.rejectedWith('Amount should be greater than fee') + }) + + it('should reject for unfair amount', async () => { + const fee = toBN(3) + const amountToWithdraw = amount.sub(fee) + const { proof, args } = await controller.withdraw({ + account, + amount: amountToWithdraw, + recipient, + publicKey, + }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.amount = toFixedHex(amountToWithdraw.add(amountToWithdraw)) + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Invalid withdrawal proof') + + await timeReset() + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amountToWithdraw) + await miner.withdraw(proof, args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + }) + + it('can use fallback with outdated tree', async () => { + const tmpReward = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmpReward.proof, tmpReward.args) + + const withdrawal = await controller.withdraw({ account, amount, recipient, publicKey }) + + const tmpWithdraw = await controller.withdraw({ + account: tmpReward.account, + amount, + recipient, + publicKey, + }) + await miner.withdraw(tmpWithdraw.proof, tmpWithdraw.args) + + await miner + .withdraw(withdrawal.proof, withdrawal.args) + .should.be.rejectedWith('Outdated account merkle root') + + const update = await controller.treeUpdate(withdrawal.account.commitment) + await timeReset() + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(withdrawal.proof, withdrawal.args, update.proof, update.args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + + const rootAfter = await miner.getLastAccountRoot() + rootAfter.should.be.equal(update.args.newRoot) + }) + + it('should reject for invalid proof', async () => { + const tmpReward = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(tmpReward.proof, tmpReward.args) + + const withdrawal = await controller.withdraw({ account, amount, recipient, publicKey }) + const tmpWithdraw = await controller.withdraw({ + account: tmpReward.account, + amount, + recipient, + publicKey, + }) + + await miner + .withdraw(tmpWithdraw.proof, withdrawal.args) + .should.be.rejectedWith('Invalid withdrawal proof') + }) + + it('should reject for malformed relayer and recipient address and fee', async () => { + const fakeRelayer = accounts[6] + const fakeRecipient = accounts[7] + const fee = 12 + const fakeFee = 123 + const { proof, args } = await controller.withdraw({ + account, + amount, + recipient, + publicKey, + fee, + relayer, + }) + const malformedArgs = JSON.parse(JSON.stringify(args)) + + malformedArgs.extData.recipient = fakeRecipient + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + malformedArgs.extData.recipient = recipient + malformedArgs.extData.relayer = fakeRelayer + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + malformedArgs.extData.relayer = relayer + malformedArgs.extData.fee = fakeFee + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Incorrect external data hash') + + const extDataHash = getExtWithdrawArgsHash({ + fee: fakeFee, + recipient: fakeRecipient, + relayer: fakeRelayer, + encryptedAccount: malformedArgs.extData.encryptedAccount, + }) + malformedArgs.extData.fee = fakeFee + malformedArgs.extData.relayer = fakeRelayer + malformedArgs.extData.recipient = fakeRecipient + malformedArgs.extDataHash = extDataHash + await miner.withdraw(proof, malformedArgs).should.be.rejectedWith('Invalid withdrawal proof') + + await timeReset() + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(proof, args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + }) + }) + + describe('#batchReward', () => { + it('should work', async () => { + let account = new Account() + const claim = await controller.reward({ account, note, publicKey }) + await miner.reward(claim.proof, claim.args) + + const { proofs, args } = await controller.batchReward({ + account: claim.account, + notes: notes.slice(1), + publicKey, + }) + await miner.batchReward(args) + + account = proofs.slice(-1)[0].account + const amount = toBN(55) + const rewardSnark = await controller.withdraw({ account, amount, recipient, publicKey }) + await timeReset() + const balanceBefore = await torn.balanceOf(recipient) + const expectedAmountInTorn = await rewardSwap.getExpectedReturn(amount) + await miner.withdraw(rewardSnark.proof, rewardSnark.args) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedAmountInTorn)) + }) + }) + + describe('#isKnownAccountRoot', () => { + it('should work', async () => { + const claim1 = await controller.reward({ account: new Account(), note: note1, publicKey }) + await miner.reward(claim1.proof, claim1.args) + + const claim2 = await controller.reward({ account: new Account(), note: note2, publicKey }) + await miner.reward(claim2.proof, claim2.args) + + const tree = new MerkleTree(levels, [], { hashFunction: poseidonHash2 }) + await miner.isKnownAccountRoot(toFixedHex(tree.root()), 0).should.eventually.be.true + + tree.insert(claim1.account.commitment) + await miner.isKnownAccountRoot(toFixedHex(tree.root()), 1).should.eventually.be.true + + tree.insert(claim2.account.commitment) + await miner.isKnownAccountRoot(toFixedHex(tree.root()), 2).should.eventually.be.true + + await miner.isKnownAccountRoot(toFixedHex(tree.root()), 1).should.eventually.be.false + await miner.isKnownAccountRoot(toFixedHex(tree.root()), 5).should.eventually.be.false + await miner.isKnownAccountRoot(toFixedHex(1234), 1).should.eventually.be.false + await miner.isKnownAccountRoot(toFixedHex(0), 0).should.eventually.be.false + await miner.isKnownAccountRoot(toFixedHex(0), 5).should.eventually.be.false + }) + }) + + describe('#setRates', () => { + it('should reject for invalid rates', async () => { + const bigNum = toBN(2).pow(toBN(128)) + await miner + .setRates([{ instance: tornado, value: bigNum.toString() }], { from: governance }) + .should.be.rejectedWith('Incorrect rate') + }) + }) + + describe('#setVerifiers', () => { + it('onlyGovernance can set new verifiers', async () => { + const verifiers = [ + '0x0000000000000000000000000000000000000001', + '0x0000000000000000000000000000000000000002', + '0x0000000000000000000000000000000000000003', + ] + await miner.setVerifiers(verifiers).should.be.rejectedWith('Only governance can perform this action') + await miner.setVerifiers(verifiers, { from: governance }) + + const rewardVerifier = await miner.rewardVerifier() + rewardVerifier.should.be.equal(verifiers[0]) + const withdrawVerifier = await miner.withdrawVerifier() + withdrawVerifier.should.be.equal(verifiers[1]) + const treeUpdateVerifier = await miner.treeUpdateVerifier() + treeUpdateVerifier.should.be.equal(verifiers[2]) + }) + }) + + afterEach(async () => { + await revertSnapshot(snapshotId.result) + // eslint-disable-next-line require-atomic-updates + snapshotId = await takeSnapshot() + }) +}) diff --git a/test/rewardSwap.test.js b/test/rewardSwap.test.js new file mode 100644 index 0000000..41d35c9 --- /dev/null +++ b/test/rewardSwap.test.js @@ -0,0 +1,190 @@ +/* global artifacts, web3, contract */ +require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-promised')).should() + +const { toBN } = require('web3-utils') +const { takeSnapshot, revertSnapshot, mineBlock } = require('../scripts/ganacheHelper') +const { tornadoFormula, reverseTornadoFormula } = require('../src/utils') +const Torn = artifacts.require('TORNMock') +const RewardSwap = artifacts.require('RewardSwapMock') +const tornConfig = require('torn-token') +const RLP = require('rlp') + +const MONTH = toBN(60 * 60 * 24 * 30) +const DURATION = toBN(60 * 60 * 24 * 365) + +// Set time to beginning of a second +async function timeReset() { + const delay = 1000 - new Date().getMilliseconds() + await new Promise((resolve) => setTimeout(resolve, delay)) + await mineBlock() +} + +async function getNextAddr(sender, offset = 0) { + const nonce = await web3.eth.getTransactionCount(sender) + return ( + '0x' + + web3.utils + .sha3(RLP.encode([sender, Number(nonce) + Number(offset)])) + .slice(12) + .substring(14) + ) +} + +contract('RewardSwap', (accounts) => { + let torn + let rewardSwap + let amount + const tornCap = toBN(tornConfig.torn.cap) + const miningCap = toBN(tornConfig.torn.distribution.miningV2.amount) + const initialTornBalance = toBN(tornConfig.miningV2.initialBalance) + let yearLiquidity + let delta = toBN(100000) // 0.0000000000001 torn error + // eslint-disable-next-line no-unused-vars + const sender = accounts[0] + const recipient = accounts[1] + // eslint-disable-next-line no-unused-vars + const relayer = accounts[2] + let snapshotId + const thirtyDays = 30 * 24 * 3600 + const poolWeight = 1e11 + + before(async () => { + const swapExpectedAddr = await getNextAddr(accounts[0], 1) + torn = await Torn.new(sender, thirtyDays, [ + { to: swapExpectedAddr, amount: miningCap.toString() }, + { to: sender, amount: tornCap.sub(miningCap).toString() }, + ]) + rewardSwap = await RewardSwap.new( + torn.address, + sender, + miningCap.toString(), + initialTornBalance.toString(), + poolWeight, + ) + yearLiquidity = miningCap.sub(initialTornBalance) + amount = toBN(await rewardSwap.poolWeight()).mul(toBN(7)) // 10**10 + + snapshotId = await takeSnapshot() + }) + + beforeEach(async () => { + await timeReset() + }) + + describe('#formula test', () => { + it('should work', async () => { + let formulaReturn + let expectedReturn + amount = amount.mul(toBN(5)) + for (let i = 1; i < 11; i++) { + amount = amount.div(toBN(i)) + formulaReturn = tornadoFormula({ balance: initialTornBalance, amount }) + expectedReturn = await rewardSwap.getExpectedReturn(amount) + expectedReturn.sub(formulaReturn).should.be.lte.BN(delta) + } + }) + }) + + describe('#constructor', () => { + it('should initialize', async () => { + const tokenFromContract = await rewardSwap.torn() + tokenFromContract.should.be.equal(torn.address) + }) + }) + + it('should return as expected', async () => { + const balanceBefore = await torn.balanceOf(recipient) + const expectedReturn = await rewardSwap.getExpectedReturn(amount) + await rewardSwap.swap(recipient, amount, { from: sender }) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.sub(balanceBefore).should.be.eq.BN(expectedReturn) + }) + + it('reverse rate', async () => { + const tokens = await rewardSwap.getExpectedReturn(amount) + const balance = await rewardSwap.tornVirtualBalance() + const points = reverseTornadoFormula({ balance, tokens }) + points.sub(amount).should.be.lt.BN(toBN(1)) + }) + + it('should be approximately additive', async () => { + const amount = toBN(10).pow(toBN(10)).mul(toBN(2)) + const delta = toBN('1000') // max floating point error + + const balanceBefore1 = await torn.balanceOf(recipient) + await rewardSwap.swap(recipient, amount, { from: sender }) + const balanceAfter1 = await torn.balanceOf(recipient) + + await revertSnapshot(snapshotId.result) + snapshotId = await takeSnapshot() + + const balanceBefore2 = await torn.balanceOf(recipient) + await rewardSwap.swap(recipient, amount.div(toBN(2)), { from: sender }) + await rewardSwap.swap(recipient, amount.div(toBN(2)), { from: sender }) + const balanceAfter2 = await torn.balanceOf(recipient) + + balanceBefore1.sub(balanceBefore2).should.be.lt.BN(delta) + balanceAfter1.sub(balanceAfter2).should.be.lt.BN(delta) + }) + + describe('#swap', () => { + it('should work as uniswap without vested tokens', async () => { + const startTimestamp = await rewardSwap.startTimestamp() + await rewardSwap.setTimestamp(startTimestamp) + + const expectedTokens = await rewardSwap.getExpectedReturn(amount) + const formulaReturn = tornadoFormula({ balance: initialTornBalance, amount }) + expectedTokens.sub(formulaReturn).should.be.lte.BN(delta) + const tornVirtualBalance = await rewardSwap.tornVirtualBalance() + tornVirtualBalance.should.be.eq.BN(initialTornBalance) + + const balanceBefore = await torn.balanceOf(recipient) + await rewardSwap.swap(recipient, amount, { from: sender }) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedTokens)) + }) + + it('should work with vested tokens (a half of year passed)', async () => { + let startTimestamp = await rewardSwap.startTimestamp() + const currentTimestamp = startTimestamp.add(DURATION.div(toBN(2))) + await rewardSwap.setTimestamp(currentTimestamp) + + const tornVirtualBalance = await rewardSwap.tornVirtualBalance() + tornVirtualBalance.should.be.eq.BN(yearLiquidity.div(toBN(2)).add(initialTornBalance)) + + const formulaReturn = tornadoFormula({ balance: tornVirtualBalance, amount }) + const expectedTokens = await rewardSwap.getExpectedReturn(amount) + + expectedTokens.sub(formulaReturn).should.be.lte.BN(delta) + const balanceBefore = await torn.balanceOf(recipient) + await rewardSwap.swap(recipient, amount, { from: sender }) + const balanceAfter = await torn.balanceOf(recipient) + balanceAfter.should.be.eq.BN(balanceBefore.add(expectedTokens)) + }) + + it('should not add any tokens after one year', async () => { + let startTimestamp = await rewardSwap.startTimestamp() + let currentTimestamp = startTimestamp.add(DURATION) + await rewardSwap.setTimestamp(currentTimestamp) + + let tornVirtualBalance = await rewardSwap.tornVirtualBalance() + tornVirtualBalance.should.be.eq.BN(miningCap) + + const formulaReturn = tornadoFormula({ balance: tornVirtualBalance, amount }) + const expectedTokens = await rewardSwap.getExpectedReturn(amount) + expectedTokens.sub(formulaReturn).should.be.lte.BN(delta) + + currentTimestamp = currentTimestamp.add(MONTH) + await rewardSwap.setTimestamp(currentTimestamp) + + tornVirtualBalance = await rewardSwap.tornVirtualBalance() + tornVirtualBalance.should.be.eq.BN(miningCap) + }) + }) + + afterEach(async () => { + await revertSnapshot(snapshotId.result) + // eslint-disable-next-line require-atomic-updates + snapshotId = await takeSnapshot() + }) +}) diff --git a/test/rewardSwap.tuning.test.js b/test/rewardSwap.tuning.test.js new file mode 100644 index 0000000..6388107 --- /dev/null +++ b/test/rewardSwap.tuning.test.js @@ -0,0 +1,126 @@ +/* global artifacts, web3, contract */ +require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-promised')).should() + +const { toBN, fromWei } = require('web3-utils') +const { takeSnapshot, revertSnapshot, increaseTime, mineBlock } = require('../scripts/ganacheHelper') +const Torn = artifacts.require('TORNMock') +const RewardSwap = artifacts.require('RewardSwapMock') +const tornConfig = require('torn-token') +const RLP = require('rlp') + +// Set time to beginning of a second +async function timeReset() { + const delay = 1000 - new Date().getMilliseconds() + await new Promise((resolve) => setTimeout(resolve, delay)) + await mineBlock() +} + +async function getNextAddr(sender, offset = 0) { + const nonce = await web3.eth.getTransactionCount(sender) + return ( + '0x' + + web3.utils + .sha3(RLP.encode([sender, Number(nonce) + Number(offset)])) + .slice(12) + .substring(14) + ) +} + +// todo mock's fixed timestamp interferes with simulation +contract.skip('RewardSwap simulation', (accounts) => { + let torn + let rewardSwap + const sender = accounts[0] + const recipient = accounts[1] + const tornCap = toBN(tornConfig.torn.cap) + const miningCap = toBN(tornConfig.torn.distribution.miningV2.amount) + const initialTornBalance = toBN(tornConfig.miningV2.initialBalance) + const poolWeight = 1e11 + let snapshotId + + async function increaseTimeDays(days, verbose = true) { + if (verbose) { + console.log(`Skipping ${days} days`) + } + + const timestamp = await rewardSwap.getTimestamp() + await rewardSwap.setTimestamp(Number(timestamp) + 60 * 60 * 24 * Number(days)) + } + + async function exchange(points, verbose = true) { + const balanceBefore = await torn.balanceOf(recipient) + await rewardSwap.swap(recipient, points, { from: sender }) + const balanceAfter = await torn.balanceOf(recipient) + const poolSize = await rewardSwap.tornVirtualBalance() + if (verbose) { + console.log( + `Exchanged ${points} points for ${fromWei( + balanceAfter.sub(balanceBefore), + )} TORN. Remaining in pool ${fromWei(poolSize)} TORN`, + ) + } + } + + before(async () => { + const swapExpectedAddr = await getNextAddr(accounts[0], 1) + torn = await Torn.new(sender, 0, [ + { to: swapExpectedAddr, amount: miningCap.toString() }, + { to: sender, amount: tornCap.sub(miningCap).toString() }, + ]) + rewardSwap = await RewardSwap.new( + torn.address, + sender, + miningCap.toString(), + initialTornBalance.toString(), + poolWeight, + ) + + snapshotId = await takeSnapshot() + }) + + beforeEach(async () => { + await timeReset() + }) + + describe('Swap Simulations', () => { + it('init', async () => { + console.log('Cap', fromWei(miningCap)) + console.log('Virtual balance', fromWei(await rewardSwap.tornVirtualBalance())) + }) + + it('rates', async () => { + let k = toBN(1) + for (let i = 0; i < 18; i++) { + console.log( + `Expected return for 10^${i} points: ${fromWei(await rewardSwap.getExpectedReturn(k))} TORN`, + ) + k = k.mul(toBN(10)) + } + }) + + it.skip('sim1', async () => { + await exchange(1e8) + await exchange(1e8) + await increaseTimeDays(1) + await exchange(1e8) + }) + + it('equilibrium sim', async () => { + const amountPerDay = 7.2e9 + for (let i = 0; i <= 450; i++) { + const verbose = i < 15 || i % 30 === 0 || (i > 360 && i < 370) + if (verbose) { + console.log(`Day ${i}`) + } + await exchange(amountPerDay, verbose) + await increaseTimeDays(1, false) + } + }) + }) + + afterEach(async () => { + await revertSnapshot(snapshotId.result) + // eslint-disable-next-line require-atomic-updates + snapshotId = await takeSnapshot() + }) +}) diff --git a/test/tornadoTrees.test.js b/test/tornadoTrees.test.js new file mode 100644 index 0000000..744020a --- /dev/null +++ b/test/tornadoTrees.test.js @@ -0,0 +1,142 @@ +/* global artifacts, web3, contract */ +require('chai').use(require('bn-chai')(web3.utils.BN)).use(require('chai-as-promised')).should() + +const { takeSnapshot, revertSnapshot } = require('../scripts/ganacheHelper') +const Note = require('../src/note') +const TornadoTrees = artifacts.require('TornadoTreesMock') +const OwnableMerkleTree = artifacts.require('OwnableMerkleTree') +const Hasher2 = artifacts.require('Hasher2') +const Hasher3 = artifacts.require('Hasher3') +const { toFixedHex, poseidonHash2, poseidonHash } = require('../src/utils') +const MerkleTree = require('fixed-merkle-tree') + +async function registerDeposit(note, tornadoTrees) { + await tornadoTrees.setBlockNumber(note.depositBlock) + await tornadoTrees.registerDeposit(note.instance, toFixedHex(note.commitment)) + return { + instance: note.instance, + hash: toFixedHex(note.commitment), + block: toFixedHex(note.depositBlock), + } +} + +async function registerWithdrawal(note, tornadoTrees) { + await tornadoTrees.setBlockNumber(note.withdrawalBlock) + await tornadoTrees.registerWithdrawal(note.instance, toFixedHex(note.nullifierHash)) + return { + instance: note.instance, + hash: toFixedHex(note.nullifierHash), + block: toFixedHex(note.withdrawalBlock), + } +} + +const levels = 16 +contract('TornadoTrees', (accounts) => { + let tornadoTrees + let snapshotId + let hasher2 + let hasher3 + let operator = accounts[0] + let depositTree + let withdrawalTree + const instances = { + one: '0x0000000000000000000000000000000000000001', + two: '0x0000000000000000000000000000000000000002', + three: '0x0000000000000000000000000000000000000003', + four: '0x0000000000000000000000000000000000000004', + } + const note1 = new Note({ + instance: instances.one, + depositBlock: 10, + withdrawalBlock: 10 + 4 * 60 * 24, + }) + const note2 = new Note({ + instance: instances.two, + depositBlock: 10, + withdrawalBlock: 10 + 2 * 4 * 60 * 24, + }) + const note3 = new Note({ + instance: instances.three, + depositBlock: 10, + withdrawalBlock: 10 + 3 * 4 * 60 * 24, + }) + + before(async () => { + hasher2 = await Hasher2.new() + hasher3 = await Hasher3.new() + tornadoTrees = await TornadoTrees.new(operator, hasher2.address, hasher3.address, levels) + depositTree = await OwnableMerkleTree.at(await tornadoTrees.depositTree()) + withdrawalTree = await OwnableMerkleTree.at(await tornadoTrees.withdrawalTree()) + snapshotId = await takeSnapshot() + }) + + describe('#constructor', () => { + it('should be initialized', async () => { + const owner = await tornadoTrees.tornadoProxy() + owner.should.be.equal(operator) + }) + }) + + describe('#updateRoots', () => { + it('should work for many instances', async () => { + const note1DepositLeaf = await registerDeposit(note1, tornadoTrees) + const note2DepositLeaf = await registerDeposit(note2, tornadoTrees) + + const note2WithdrawalLeaf = await registerWithdrawal(note2, tornadoTrees) + + const note3DepositLeaf = await registerDeposit(note3, tornadoTrees) + const note3WithdrawalLeaf = await registerWithdrawal(note3, tornadoTrees) + + await tornadoTrees.updateRoots( + [note1DepositLeaf, note2DepositLeaf, note3DepositLeaf], + [note2WithdrawalLeaf, note3WithdrawalLeaf], + ) + + const localDepositTree = new MerkleTree(levels, [], { + hashFunction: poseidonHash2, + }) + + localDepositTree.insert(poseidonHash([note1.instance, note1.commitment, note1.depositBlock])) + localDepositTree.insert(poseidonHash([note2.instance, note2.commitment, note2.depositBlock])) + localDepositTree.insert(poseidonHash([note3.instance, note3.commitment, note3.depositBlock])) + + const lastDepositRoot = await depositTree.getLastRoot() + toFixedHex(localDepositTree.root()).should.be.equal(lastDepositRoot.toString()) + + const localWithdrawalTree = new MerkleTree(levels, [], { + hashFunction: poseidonHash2, + }) + localWithdrawalTree.insert(poseidonHash([note2.instance, note2.nullifierHash, note2.withdrawalBlock])) + localWithdrawalTree.insert(poseidonHash([note3.instance, note3.nullifierHash, note3.withdrawalBlock])) + + const lastWithdrawalRoot = await withdrawalTree.getLastRoot() + toFixedHex(localWithdrawalTree.root()).should.be.equal(lastWithdrawalRoot.toString()) + }) + it('should work for empty arrays', async () => { + await tornadoTrees.updateRoots([], []) + }) + }) + + describe('#getRegisteredDeposits', () => { + it('should work', async () => { + const note1DepositLeaf = await registerDeposit(note1, tornadoTrees) + let res = await tornadoTrees.getRegisteredDeposits() + res.length.should.be.equal(1) + // res[0].should.be.true + await tornadoTrees.updateRoots([note1DepositLeaf], []) + + res = await tornadoTrees.getRegisteredDeposits() + res.length.should.be.equal(0) + + await registerDeposit(note2, tornadoTrees) + res = await tornadoTrees.getRegisteredDeposits() + // res[0].should.be.true + }) + }) + + afterEach(async () => { + await revertSnapshot(snapshotId.result) + // eslint-disable-next-line require-atomic-updates + snapshotId = await takeSnapshot() + }) +}) diff --git a/truffle.js b/truffle.js new file mode 100644 index 0000000..4bd9c3e --- /dev/null +++ b/truffle.js @@ -0,0 +1,73 @@ +require('dotenv').config() +const HDWalletProvider = require('truffle-hdwallet-provider') +const utils = require('web3-utils') +const { PRIVATE_KEY, INFURA_TOKEN } = process.env + +module.exports = { + // Uncommenting the defaults below + // provides for an easier quick-start with Ganache. + // You can also follow this format for other networks; + // see + // for more details on how to specify configuration options! + // + networks: { + // development: { + // host: '127.0.0.1', + // port: 8545, + // network_id: '*', + // }, + // test: { + // host: "127.0.0.1", + // port: 7545, + // network_id: "*" + // } + mainnet: { + provider: () => new HDWalletProvider(PRIVATE_KEY, `https://mainnet.infura.io/v3/${INFURA_TOKEN}`), + network_id: 1, + gas: 6000000, + gasPrice: utils.toWei('100', 'gwei'), + // confirmations: 0, + // timeoutBlocks: 200, + skipDryRun: true, + }, + kovan: { + provider: () => new HDWalletProvider(PRIVATE_KEY, `https://kovan.infura.io/v3/${INFURA_TOKEN}`), + network_id: 42, + gas: 6000000, + gasPrice: utils.toWei('1', 'gwei'), + // confirmations: 0, + // timeoutBlocks: 200, + skipDryRun: true, + }, + coverage: { + host: 'localhost', + network_id: '*', + port: 8554, // <-- If you change this, also set the port option in .solcover.js. + gas: 0xfffffffffff, // <-- Use this high gas value + gasPrice: 0x01, // <-- Use this low gas price + }, + }, + compilers: { + solc: { + version: '0.6.12', + settings: { + optimizer: { + enabled: true, + runs: 200, + }, + }, + }, + external: { + command: 'node ./compileHasher.js', + targets: [ + { + path: './build/contracts/Hasher2.json', + }, + { + path: './build/contracts/Hasher3.json', + }, + ], + }, + }, + plugins: ['truffle-plugin-verify', 'solidity-coverage'], +} diff --git a/yarn.lock b/yarn.lock new file mode 100644 index 0000000..4301fbe --- /dev/null +++ b/yarn.lock @@ -0,0 +1,6486 @@ +# THIS IS AN AUTOGENERATED FILE. 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