mirror of
https://github.com/tornadocash/fixed-merkle-tree.git
synced 2024-12-12 04:27:21 +01:00
.github/workflows | ||
lib | ||
src | ||
test | ||
.editorconfig | ||
.eslintrc | ||
.gitignore | ||
.nvmrc | ||
.prettierrc | ||
package-lock.json | ||
package.json | ||
README.md | ||
tsconfig.json |
Merkle Tree
This is a fixed depth merkle tree implementation with sequential inserts
Usage
import { MerkleTree, PartialMerkleTree } from 'fixed-merkle-tree'
const tree = new MerkleTree(10, [1, 2, 3, 4, 5])
tree.insert(6)
tree.update(3, 42)
const path = tree.proof(3)
console.log(path)
// output
{
pathElements: [
42,
'4027992409016347597424110157229339967488',
'2008015086710634950773855228781840564224',
'938972308169430750202858820582946897920',
'3743880566844110745576746962917825445888',
'2074434463882483178614385966084599578624',
'2808856778596740691845240322870189490176',
'4986731814143931240516913804278285467648',
'1918547053077726613961101558405545328640',
'5444383861051812288142814494928935059456'
],
pathIndices: [
0, 1, 0, 0, 0,
0, 0, 0, 0, 0
],
pathPositions: [
3, 0, 1, 0, 0,
0, 0, 0, 0, 0
],
pathRoot: '3917789723822252567979048877718291611648'
}
const treeEdge = tree.getTreeEdge(2)
const partialTree = new PartialMerkleTree(10, treeEdge, tree.elements.slice(treeEdge.edgeIndex))
console.log(partialTree.elements)
// [<2 empty items >, 3, 42, 5, 6]
const proofPath = partialTree.proof(3)
console.log(proofPath)
// output
{
pathElements: [
42,
'4027992409016347597424110157229339967488',
'2008015086710634950773855228781840564224',
'938972308169430750202858820582946897920',
'3743880566844110745576746962917825445888',
'2074434463882483178614385966084599578624',
'2808856778596740691845240322870189490176',
'4986731814143931240516913804278285467648',
'1918547053077726613961101558405545328640',
'5444383861051812288142814494928935059456'
],
pathIndices: [
0, 1, 0, 0, 0,
0, 0, 0, 0, 0
],
pathPositions: [
3, 0, 1, 0, 0,
0, 0, 0, 0, 0
],
pathRoot: '3917789723822252567979048877718291611648'
}