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fixed-merkle-tree
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downgrade syntax for node 12

This commit is contained in:
poma 2020-07-31 15:02:01 +03:00
parent 6663aec38c
commit 3aff8f4515
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GPG Key ID: BA20CB01FE165657
1 changed files with 11 additions and 5 deletions
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16
src/merkleTree.js
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@ -25,7 +25,7 @@ class MerkleTree {
this.levels = levels
this.capacity = 2 << levels
this.zeroElement = zeroElement
this._hash = hashFunction ?? defaultHash
this._hash = hashFunction || defaultHash
this._zeros = []
this._layers = []
@ -43,7 +43,9 @@ class MerkleTree {
for (let i = 0; i < Math.ceil(this._layers[level - 1].length / 2); i++) {
this._layers[level][i] = this._hash(
this._layers[level - 1][i * 2],
this._layers[level - 1]?.[i * 2 + 1] ?? this._zeros[level - 1],
i * 2 + 1 < this._layers[level - 1].length ?
this._layers[level - 1][i * 2 + 1] :
this._zeros[level - 1],
)
}
}
@ -54,7 +56,7 @@ class MerkleTree {
* @returns {*}
*/
root() {
return this._layers[this.levels]?.[0] ?? this._zeros[this.levels]
return this._layers[this.levels].length > 0 ? this._layers[this.levels][0] : this._zeros[this.levels]
}
/**
@ -94,7 +96,9 @@ class MerkleTree {
index >>= 1
this._layers[level][index] = this._hash(
this._layers[level - 1][index * 2],
this._layers[level - 1]?.[index * 2 + 1] ?? this._zeros[level - 1],
index * 2 + 1 < this._layers[level - 1].length ?
this._layers[level - 1][index * 2 + 1] :
this._zeros[level - 1],
)
}
}
@ -112,7 +116,9 @@ class MerkleTree {
const pathIndex = []
for (let level = 0; level < this.levels; level++) {
pathIndex[level] = index % 2
pathElements[level] = this._layers[level]?.[index ^ 1] ?? this._zeros[level]
pathElements[level] = (index ^ 1) < this._layers[level].length ?
this._layers[level][index ^ 1] :
this._zeros[level]
index >>= 1
}
return {