@nori-zk/o1js-zk-utils/build/ContractDepositAttestor.js

o1js-zk-utils supporting Nori Bridge

import { Bytes, Field, Poseidon, Struct, UInt8 } from 'o1js';
import { Bytes20, Bytes32 } from './types.js';
import { merkleLeafAttestorGenerator } from './merkle-attestor/merkleLeafAttestor.js';
export class ContractDeposit extends Struct({
    address: Bytes20.provable,
    attestationHash: Bytes32.provable,
    value: Bytes32.provable,
}) {
}
export function provableStorageSlotLeafHash(contractDeposit) {
    const addressBytes = contractDeposit.address.bytes; // UInt8[]
    const attestationHashBytes = contractDeposit.attestationHash.bytes; // UInt8[]
    const valueBytes = contractDeposit.value.bytes; // UInt8[]
    // We want 20 bytes from addrBytes (+ 1 byte from attBytes and 1 byte from valueBytes), remaining 31 bytes from attBytes, remaining 31 bytes from valueBytes
    // firstFieldBytes: 20 bytes from addressBytes + 1 byte from attBytes and 1 byte from valueBytes
    const firstFieldBytes = [];
    for (let i = 0; i < 20; i++) {
        firstFieldBytes.push(addressBytes[i]);
    }
    firstFieldBytes.push(attestationHashBytes[0]);
    firstFieldBytes.push(valueBytes[0]);
    for (let i = 22; i < 32; i++) {
        firstFieldBytes.push(UInt8.zero); // static pad to 32
    }
    // secondFieldBytes: remaining 31 bytes from attBytes (1 to 31)
    const secondFieldBytes = [];
    for (let i = 1; i < 32; i++) {
        secondFieldBytes.push(attestationHashBytes[i]);
    }
    // already 31 elements; add 1 zero to reach 32
    secondFieldBytes.push(UInt8.zero);
    // secondFieldBytes: remaining 31 bytes from valueBytes (1 to 31)
    const thirdFieldBytes = [];
    for (let i = 1; i < 32; i++) {
        thirdFieldBytes.push(valueBytes[i]);
    }
    // already 31 elements; add 1 zero to reach 32
    thirdFieldBytes.push(UInt8.zero);
    // Convert UInt8[] to Bytes (provable bytes)
    const firstBytes = Bytes.from(firstFieldBytes);
    const secondBytes = Bytes.from(secondFieldBytes);
    const thirdBytes = Bytes.from(thirdFieldBytes);
    /*Provable.asProver(() => {
        Provable.log('firstBytes.toFields()', firstBytes.toFields());
        Provable.log('secondBytes.toFields()', secondBytes.toFields());
        Provable.log('thirdBytes.toFields()', thirdBytes.toFields());
    });*/
    // Little endian
    let firstField = new Field(0);
    let secondField = new Field(0);
    let thirdField = new Field(0);
    for (let i = 31; i >= 0; i--) {
        firstField = firstField.mul(256).add(firstBytes.bytes[i].value);
        secondField = secondField.mul(256).add(secondBytes.bytes[i].value);
        thirdField = thirdField.mul(256).add(thirdBytes.bytes[i].value);
    }
    /*Provable.asProver(() => {
        Provable.log('(provable)firstField', firstField.toBigInt());
        Provable.log('(provable)secondField', secondField.toBigInt());
        Provable.log('(provable)thirdField', thirdField.toBigInt());
    });*/
    return Poseidon.hash([firstField, secondField, thirdField]);
}
const { MerkleTreeLeafAttestorInput: ContractDepositAttestorInput, MerkleTreeLeafAttestor: ContractDepositAttestor, MerkleTreeLeafAttestorProof: ContractDepositAttestorProof, buildLeaves: buildContractDepositLeaves, getMerklePathFromLeaves: getContractDepositWitness, } = merkleLeafAttestorGenerator(16, 'ContractStorageSlotDepositAttestor', ContractDeposit, provableStorageSlotLeafHash);
export { ContractDepositAttestorInput, ContractDepositAttestor, ContractDepositAttestorProof, buildContractDepositLeaves, getContractDepositWitness, };
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