fixed-merkle-tree/src/index.ts

35 lines
856 B
TypeScript

import { simpleHash } from './simpleHash'
export { default as MerkleTree } from './FixedMerkleTree'
export { PartialMerkleTree } from './PartialMerkleTree'
export { simpleHash } from './simpleHash'
export type HashFunction<T> = {
(left: T, right: T): string
}
export type MerkleTreeOptions = {
hashFunction?: HashFunction<Element>
zeroElement?: Element
}
export type Element = string | number
export type SerializedTreeState = {
levels: number,
_zeros: Array<Element>,
_layers: Array<Element[]>
}
export type ProofPath = {
pathElements: Element[],
pathIndices: number[],
pathPositions: number[],
}
export type TreeEdge = {
edgeElement: Element;
edgePath: ProofPath;
edgeIndex: number
}
export const defaultHash = (left: Element, right: Element): string => (left !== null && right !== null) ? simpleHash([left, right]) : null