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feat!:add receipt mpt to private input for context (safe-eth)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| import { Trie } from '@ethereumjs/trie' | ||
| import { MapDB } from '@ethereumjs/util' | ||
| import { RLP } from '@ethereumjs/rlp' | ||
| import { utils } from 'ethers' | ||
| import { fromHexString, safeHex, uint8ArrayToHex } from '../../common/utils' | ||
|
|
||
| // TODO: move this to rek | ||
| export class MPTTrie { | ||
| trie: Trie | ||
| keys: string[] | ||
| values: string[] | ||
| proof = new Map<number, string[]>() // cache, only fill with prove() | ||
| constructor() { | ||
| this.keys = [] | ||
| this.values = [] | ||
| } | ||
|
|
||
| /** | ||
| * | ||
| * @param leafValues adapt to receipt trie, can pass in receiptRlp as leafValue | ||
| * @returns this | ||
| */ | ||
| async build(leafValues: string[]) { | ||
| const leafCount = leafValues.length | ||
| if (leafCount === 0) | ||
| throw new Error('empty leaf value list, can\'t create mpt trie') | ||
| this.trie = await Trie.create({ db: new MapDB() }) | ||
| this.keys = [] | ||
| this.values = [] | ||
| for (let leafIdx = 0; leafIdx < leafCount; leafIdx++) { | ||
| const key = uint8ArrayToHex(RLP.encode(leafIdx)) | ||
| const rlp = safeHex(leafValues[leafIdx]) | ||
| this.keys.push(key) | ||
| this.values.push(rlp) | ||
|
|
||
| // console.log('key: ', key) | ||
| // console.log('rlp: ', rlp) | ||
| await this.trie.put(fromHexString(key), fromHexString(rlp)) | ||
| } | ||
| return this | ||
| } | ||
|
|
||
| root(): Uint8Array { | ||
| return this.trie.root() | ||
| } | ||
|
|
||
| async prove(idx: number, cache = false): Promise<string[]> { | ||
| const prf = await this._prove(this.keys[idx]) | ||
| if (cache) | ||
| this.proof.set(idx, prf) | ||
| return prf | ||
| // return this._proof(this.keys[idx]); | ||
| } | ||
|
|
||
| async _prove(key: string): Promise<string[]> { | ||
| // _proof(key: string): string[] { | ||
| const { stack } = await this.trie.findPath(fromHexString(key)) | ||
| const proof_paths = [] | ||
| for (let i = 0; i < stack.length; i++) | ||
| proof_paths.push(uint8ArrayToHex(stack[i].serialize())) | ||
|
|
||
| // console.log('proof paths: ', proof_paths) | ||
| return proof_paths | ||
| } | ||
|
|
||
| lastNodeRlp(proof: string[]) { | ||
| const last = proof.pop() | ||
| if (!last) | ||
| throw new Error('can\'t find last node.') | ||
| return last | ||
| } | ||
|
|
||
| lastNodeRlpHash(proof: string[]) { | ||
| return utils.keccak256(fromHexString(this.lastNodeRlp(proof))) | ||
| } | ||
| } |