tornadocash/fixed-merkle-tree
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Minor fix

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This commit is contained in:
Rodrigo Q. Saramago 2022-07-11 14:17:38 +02:00
parent 1ae0bc1119
commit 4e69875311
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GPG Key ID: 9B36B2525704A359
1 changed files with 13 additions and 14 deletions
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27
src/BaseTree.ts
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@ -143,12 +143,7 @@ export class BaseTree {
static nextLayerMultiPathIndices(indices: number[]): number[] {
let nextIndices: Set<number> = new Set()
for (let i = 0; i < indices.length; i++) {
let elIdx = indices[i]
if (elIdx % 2 === 0) {
nextIndices.add(Math.ceil(elIdx / 2))
} else {
nextIndices.add(Math.ceil((elIdx ^ 1) / 2))
}
nextIndices.add(indices[i] >> 1)
}
return [...nextIndices]
}
@ -162,14 +157,18 @@ export class BaseTree {
let pathElements: Element[] = []
let layerIndices = indices
for (let level = 0; level < this.levels; level++) {
// find the neighbor idx that is not in layerIndices
let proofElements = layerIndices
.filter((idx) => !layerIndices.includes(idx ^ 1))
.map((idx) => this._layers[level][idx ^ 1])
if (proofElements.length == 0) {
break
}
// find whether there is a neighbor idx that is not in layerIndices
let proofElements = layerIndices.reduce((elements, idx) => {
const leafIndex = idx ^ 1
if (!layerIndices.includes(leafIndex)) {
if (leafIndex < this._layers[level].length) {
elements.push(this._layers[level][leafIndex])
} else {
elements.push(this._zeros[level])
}
}
return elements
}, [])
pathElements = pathElements.concat(proofElements)
layerIndices = BaseTree.nextLayerMultiPathIndices(layerIndices)
}