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import { randomBytes } from 'crypto'
import { readFileSync } from 'fs';
import { MerkleTree } from './MerkleTree';
import { keccak256 } from "@ethersproject/keccak256/lib/index.js";
import fs from 'fs'
// @ts-ignore
import { Fr } from '@aztec/bb.js';
const ZERO_VALUE = "0xf35fcb490b7ea67c3ac26ed530fa5d8dfe8be344e7177ebb63fe02723fb6f725";
const MAX_VALUE = Fr.MAX_VALUE;
export const treeConfig = {
utxoDepth: 4,
txDepth: 4,
stateDepth: 9
}
export const circuitConfig = {
main: "./src/main.nr"
}
const treeSum = [treeConfig.utxoDepth, treeConfig.txDepth, treeConfig.stateDepth].reduce((a, b) => a + b)
function evalWithScopePrefix(js) {
let public_inputs = {};
js.split('\n').forEach(line => {
const trimmedLine = line.trim();
if (trimmedLine.length > 0) {
eval(`public_inputs.` + trimmedLine);
}
});
return public_inputs;
}
export function randomBytesFr(numBytes) {
const bytes = randomBytes(numBytes)
const bytesFr = Fr.fromBufferReduce(bytes)
return bytesFr
}
export const format = (data) => {
if (typeof data === "string") return `"${data}"`;
if (data.length === 0) return "[]";
return `[\n "${data.join('",\n "')}"\n]`;
}
export const dumpToml = (data) => {
let toml: any = [];
Object.entries(data).forEach(([key, value]) => {
toml.push(`${key} = ${format(value)}`);
});
toml = toml.join('\n');
fs.writeFileSync('./circuits/main/Prover.toml', toml);
}
export const dumpTomlRecursive = (data) => {
let toml: any = [];
Object.entries(data).forEach(([key, value]) => {
toml.push(`${key} = ${format(value)}`);
});
toml = toml.join('\n');
fs.writeFileSync('./circuits/recursion/Prover.toml', toml);
}
export function path_to_uint8array(path) {
let buffer = readFileSync(path);
return new Uint8Array(buffer);
}
const toFixedHex = (number, pad0x, length = 32) => {
let hexString = number.toString(16).padStart(length * 2, '0');
return (pad0x ? `0x` + hexString : hexString);
}
export function getSolidityHash(asset) {
return keccak256(asset);
}
export function generateHashPathInput(hash_path) {
let hash_path_input: string[] = [];
for (var i = 0; i < hash_path.length; i++) {
hash_path_input.push(`0x` + hash_path[i]);
}
return hash_path_input;
}
export async function generateUTXO(batchSize, amounts, _secrets, BarretenbergApi) {
let utxos: any[] = []
for (let i = 0; i < batchSize; i++) {
let amountBN = amounts[i]
let utxo = {
secret: _secrets[i],
owner: await BarretenbergApi.pedersenPlookupCompress([_secrets[i]]),
amountBN: amountBN,
amount: Fr.fromString(toFixedHex(Number(amountBN.toString()), true)),
assetType: Fr.fromBufferReduce(Buffer.from(getSolidityHash(0), 'hex')),
}
utxos.push(utxo)
}
return utxos
}
export async function generateTreeProof(utxoIn, BarretenbergApi, contract) {
let trees = {
utxo_tree: new MerkleTree(treeConfig.utxoDepth, BarretenbergApi),
tx_tree: new MerkleTree(treeConfig.txDepth, BarretenbergApi),
historic_tree: new MerkleTree(treeConfig.stateDepth, BarretenbergApi),
}
await trees.utxo_tree.init()
await trees.tx_tree.init()
await trees.historic_tree.init()
let commitment = await BarretenbergApi.pedersenPlookupCompress(
[utxoIn.owner, utxoIn.amount, utxoIn.assetType]
)
commitment = commitment.toString()
let old_root = await contract.getRootFromUtxo(commitment)
let utxo_list = await contract.getUtxoFromRoot(old_root)
let historic_roots = await contract.getValidRoots()
let oracle = await BarretenbergApi.pedersenPlookupCompress([new Fr(0n)])
for (let i = 0; i < utxo_list.length; i++) {
await trees.utxo_tree.insert(utxo_list[i]);
}
let utxo_root = trees.utxo_tree.root()
await trees.tx_tree.insert(utxo_root);
let tx_root_Fr = Fr.fromString(trees.tx_tree.root())
let batch = await BarretenbergApi.pedersenPlookupCompress([tx_root_Fr, oracle])
let new_root = await BarretenbergApi.pedersenPlookupCompress([batch, Fr.fromString(old_root)])
new_root = new_root.toString()
for (let i = 0; i < historic_roots.length; i++) {
await trees.historic_tree.insert(historic_roots[i]);
}
let proofs = {
utxo: {
leaf: commitment,
index: trees.utxo_tree.getIndex(commitment),
root: utxo_root,
hash_path: trees.utxo_tree.proof(
trees.utxo_tree.getIndex(commitment)
).pathElements
},
tx: {
leaf: utxo_root,
index: trees.tx_tree.getIndex(utxo_root),
root: trees.tx_tree.root(),
hash_path: trees.tx_tree.proof(
trees.tx_tree.getIndex(utxo_root)
).pathElements
},
historic: {
leaf: new_root,
index: trees.historic_tree.getIndex(new_root),
root: trees.historic_tree.root(),
hash_path: trees.historic_tree.proof(
trees.historic_tree.getIndex(new_root)
).pathElements
}
}
return proofs
}
export async function generateDataToml(oldRoot, newRoot, trees, api) {
let zeroHex = toFixedHex(0, true)
let zeroHash = await api.pedersenPlookupCompress([Fr.fromString(zeroHex)])
const data = {
tx_in: new Array(16).fill(ZERO_VALUE),
secrets: new Array(16).fill(zeroHex),
utxo_in: new Array(48).fill(zeroHex),
utxo_out: new Array(48).fill(zeroHex),
oracle: zeroHash.toString(),
old_root_proof: new Array(16).fill(zeroHex),
old_root: ZERO_VALUE,
new_root: ZERO_VALUE,
current_root: trees.historic_tree.root(),
indexes: new Array(48).fill(zeroHex),
hash_path: new Array(16 * treeSum).fill(zeroHex),
commitment_out: new Array(16).fill(ZERO_VALUE),
deposit: zeroHex,
withdrawals: new Array(16).fill(zeroHex),
nullifier_hashes: new Array(16).fill(ZERO_VALUE),
recipients: new Array(16).fill(zeroHex)
}
if (oldRoot !== "0") data.old_root = oldRoot;
if (newRoot !== "0") data.new_root = newRoot;
return data
}
export async function generateTestTransaction(utxoIn, utxoOut, trees, treeProof, amountPublic, data, recipients, BarretenbergApi, contract) {
let utxoInLen = utxoIn.length
let utxoOutLen = utxoOut.length
for (let i = 0; i < utxoInLen; i++) {
let ownerHex = utxoIn[i].owner.toString();
let amountHex = utxoIn[i].amount.toString();
let assetTypeHex = utxoIn[i].assetType.toString();
let note_commitment = await BarretenbergApi.pedersenPlookupCompress([utxoIn[i].owner, utxoIn[i].amount, utxoIn[i].assetType]);
let utxoLeaf = note_commitment.toString()
data.secrets[i] = utxoIn[i].secret.toString()
data.nullifier_hashes[i] = (await BarretenbergApi.pedersenPlookupCompress([utxoIn[i].secret, utxoIn[i].secret])).toString()
data.old_root_proof[i] = await contract.utxoPrevRoots(utxoLeaf)
data.utxo_in[i * 3 + 0] = ownerHex
data.utxo_in[i * 3 + 1] = amountHex
data.utxo_in[i * 3 + 2] = assetTypeHex
data.indexes[i * 4 + 0] = treeProof[i].utxo.index
data.indexes[i * 4 + 1] = treeProof[i].tx.index
data.indexes[i * 4 + 2] = treeProof[i].historic.index
let utxoPath = treeProof[i].utxo.hash_path
let txPath = treeProof[i].tx.hash_path
let historicPath = treeProof[i].historic.hash_path
for (let j = 0; j < utxoPath.length; j++) {
data.hash_path[i * treeSum + 0 + j] = utxoPath[j]
data.hash_path[i * treeSum + treeConfig.utxoDepth + j] = txPath[j]
}
for (let k = 0; k < historicPath.length; k++) {
data.hash_path[i * treeSum + treeConfig.utxoDepth + treeConfig.txDepth + k] = historicPath[k]
}
}
for (let i = 0; i < utxoOutLen; i++) {
let ownerHex = utxoOut[i].owner.toString();
let amountHex = utxoOut[i].amount.toString();
let assetTypeHex = utxoOut[i].assetType.toString();
let note_commitment = await BarretenbergApi.pedersenPlookupCompress([utxoOut[i].owner, utxoOut[i].amount, utxoOut[i].assetType]);
let utxoLeaf = note_commitment.toString()
await trees.utxo_tree.insert(utxoLeaf)
data.utxo_out[i * 3 + 0] = ownerHex
data.utxo_out[i * 3 + 1] = amountHex
data.utxo_out[i * 3 + 2] = assetTypeHex
data.commitment_out[i] = utxoLeaf
}
data.tx_in[0] = trees.utxo_tree.root()
data.deposit = toFixedHex(Number(amountPublic.amountIn.toString()), true)
for (let w = 0; w < amountPublic.amountOut.length; w++) {
data.withdrawals[w] = toFixedHex(Number(amountPublic.amountOut[w].toString()), true)
}
for (let r = 0; r < recipients.length; r++) {
data.recipients[r] = recipients[r];
}
data.current_root = trees.historic_tree.root()
}
export async function generateTestPublish(trees, data, api) {
let utxoTree = trees.utxo_tree
let txTree = trees.tx_tree
let historicTree = trees.historic_tree
let utxoRoot = utxoTree.root()
await txTree.insert(utxoRoot)
let txRoot = txTree.root()
let txRootFr = Fr.fromBufferReduce(Buffer.from(txRoot.slice(2), 'hex'))
let oracleFr = Fr.fromBufferReduce(toFixedHex(0, true))
let oracleHash = await api.pedersenPlookupCompress([oracleFr])
let batch = await api.pedersenPlookupCompressFields(txRootFr, oracleHash)
let oldHistoricRoot = Fr.fromBufferReduce(Buffer.from(data.new_root.slice(2), 'hex'))
let newHistoricRoot = await api.pedersenPlookupCompress([batch, oldHistoricRoot])
let newHistoricRootHex = newHistoricRoot.toString()
await historicTree.insert(newHistoricRootHex)
data.old_root = oldHistoricRoot.toString()
data.new_root = newHistoricRootHex
trees.utxoTreeOld = trees.utxo_tree
trees.txTreeOld = trees.tx_tree
trees.newHistoricRoot = newHistoricRootHex
const input = [
data.current_root,
data.deposit,
data.withdrawals,
data.commitment_out,
data.recipients,
data.oracle,
data.old_root_proof,
data.nullifier_hashes,
data.secrets,
data.utxo_in,
data.utxo_out,
data.indexes,
data.hash_path
];
dumpToml(data)
}