OVM

.gitignore

@@ -3,3 +3,6 @@ node_modules
 build
 cache
 artifacts
+artifacts-ovm
+cache-ovm
+

hardhat.config.js

@@ -1,4 +1,5 @@
 require('@nomiclabs/hardhat-waffle')
+require('@eth-optimism/hardhat-ovm')
 require('dotenv').config()
 
 const config = {
@@ -11,6 +12,9 @@ const config = {
       },
     },
   },
+  ovm: {
+    solcVersion: '0.7.6', // Your version goes here.
+  },
   networks: {
     // goerli: {
     //   url: process.env.ETH_RPC,
@@ -20,6 +24,19 @@ const config = {
     //         mnemonic: 'test test test test test test test test test test test junk',
     //       },
     // },
+    optimism: {
+      url: process.env.ETH_RPC,
+      accounts: process.env.PRIVATE_KEY
+        ? [process.env.PRIVATE_KEY]
+        : {
+            mnemonic: 'test test test test test test test test test test test junk',
+          },
+      // This sets the gas price to 0 for all transactions on L2. We do this
+      // because account balances are not automatically initiated with an ETH
+      // balance (yet, sorry!).
+      gasPrice: 15000000,
+      ovm: true, // This sets the network as using the ovm and ensure contract will be compiled against that.
+    },
   },
   mocha: {
     timeout: 600000000,

package.json

@@ -41,6 +41,7 @@
     "tmp-promise": "^3.0.2"
   },
   "devDependencies": {
+    "@eth-optimism/hardhat-ovm": "^0.2.2",
     "babel-eslint": "^10.1.0",
     "eslint": "^7.28.0",
     "eslint-config-prettier": "^8.3.0",

yarn.lock

@@ -158,6 +158,13 @@
     minimatch "^3.0.4"
     strip-json-comments "^3.1.1"
 
+"@eth-optimism/hardhat-ovm@^0.2.2":
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/@eth-optimism/hardhat-ovm/-/hardhat-ovm-0.2.2.tgz#55fafaa6b8277447abaf132602c1c6d14a2a18a2"
+  integrity sha512-QLzqawYCzC/m6K/Oaj/tCZQlu6kZTgnleg1cJad8kVYA5E+JWZQ6ZJrcStoJoJrco9RIroPUjAFEhFM8YiCc7Q==
+  dependencies:
+    node-fetch "^2.6.1"
+
 "@ethereum-waffle/chai@^3.3.0":
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/@ethereum-waffle/chai/-/chai-3.3.1.tgz#3f20b810d0fa516f19af93c50c3be1091333fa8e"
@@ -4230,10 +4237,10 @@ find-yarn-workspace-root@^2.0.0:
   dependencies:
     micromatch "^4.0.2"
 
-fixed-merkle-tree@^0.5.0:
+fixed-merkle-tree@^0.5.1:
-  version "0.5.0"
+  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/fixed-merkle-tree/-/fixed-merkle-tree-0.5.0.tgz#401cdcf3d670c1e18bc7d3a8e81322eb1b27c1d1"
+  resolved "https://registry.yarnpkg.com/fixed-merkle-tree/-/fixed-merkle-tree-0.5.1.tgz#770bbf64b174e88b1133841721b79ea99a63d0b5"
-  integrity sha512-egOy12EzVATX3Ru2/SLtnWprVpy/sbPCt/MbeG3ANB28jykWLEYj7EjinFnOxtsgR3gTHU6xYXX53yMn/bZqyw==
+  integrity sha512-9daba9QU5tWa1scXpWusMFVJgYbSIPJUXdgn0JaaXSK1m4xSjzfTjdT3bYuo/x1xeLWrYj5i21E8q+vxyP7TCw==
   dependencies:
     circomlib "git+https://github.com/tornadocash/circomlib.git#5beb6aee94923052faeecea40135d45b6ce6172c"
     snarkjs "git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5"
@@ -6432,7 +6439,7 @@ node-fetch@2.1.2:
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.1.2.tgz#ab884e8e7e57e38a944753cec706f788d1768bb5"
   integrity sha1-q4hOjn5X44qUR1POxwb3iNF2i7U=
 
-node-fetch@^2.6.0:
+node-fetch@^2.6.0, node-fetch@^2.6.1:
   version "2.6.1"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
   integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
@@ -7847,20 +7854,9 @@ snapdragon@^0.8.1:
     source-map-resolve "^0.5.0"
     use "^3.1.0"
 
-"snarkjs@git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5":
+"snarkjs@git+https://github.com/tornadocash/snarkjs.git#616c2d30699f28c8f3ab737b877402ccbb604cfe":
-  version "0.1.20"
-  resolved "git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5"
-  dependencies:
-    big-integer "^1.6.43"
-    chai "^4.2.0"
-    escape-string-regexp "^1.0.5"
-    eslint "^5.16.0"
-    keccak "^2.0.0"
-    yargs "^12.0.5"
-
-"snarkjs@git+https://github.com/tornadocash/snarkjs.git#c103e3bf10e95e2e9bbf0f7952ed13812f8e39d3":
   version "0.4.5"
-  resolved "git+https://github.com/tornadocash/snarkjs.git#c103e3bf10e95e2e9bbf0f7952ed13812f8e39d3"
+  resolved "git+https://github.com/tornadocash/snarkjs.git#616c2d30699f28c8f3ab737b877402ccbb604cfe"
   dependencies:
     "@iden3/binfileutils" "0.0.8"
     blake2b-wasm "https://github.com/jbaylina/blake2b-wasm.git"
@@ -7873,6 +7869,17 @@ snapdragon@^0.8.1:
     r1csfile "0.0.32"
     readline "^1.3.0"
 
+"snarkjs@git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5":
+  version "0.1.20"
+  resolved "git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5"
+  dependencies:
+    big-integer "^1.6.43"
+    chai "^4.2.0"
+    escape-string-regexp "^1.0.5"
+    eslint "^5.16.0"
+    keccak "^2.0.0"
+    yargs "^12.0.5"
+
 solc@0.7.3:
   version "0.7.3"
   resolved "https://registry.yarnpkg.com/solc/-/solc-0.7.3.tgz#04646961bd867a744f63d2b4e3c0701ffdc7d78a"