aa-schnorr-multisig-sdk/dist/transaction/MultiSigUserOpWithSigners.js

Account Abstraction Schnorr Multi-Signatures SDK

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MultiSigUserOpWithSigners = void 0;
const ethers_1 = require("ethers");
const schnorr_helpers_1 = require("../helpers/schnorr-helpers");
const signers_1 = require("../signers");
class MultiSigUserOpWithSigners {
    constructor(signers, opHash, userOpRequest) {
        this.publicNonces = {};
        this.publicKeys = {};
        this.signatures = {};
        if (signers.length < 2)
            throw new Error("At least 2 signers should be provided");
        this.signers = signers;
        this.opHash = opHash;
        this.userOpRequest = userOpRequest;
        const _publicKeys = signers.map((signer) => {
            const _address = signer.getAddress();
            // generate and get public nonces
            if (signer.hasNonces())
                throw new Error("Signer already has nonces");
            this.publicNonces[_address] = signer.generatePubNonces();
            // get public keys
            const _pk = signer.getPubKey();
            this.publicKeys[_address] = _pk;
            return _pk;
        });
        // get combined public key created from all signers' public keys
        const _combinedPubKey = signers_1.Schnorrkel.getCombinedPublicKey(_publicKeys);
        this.combinedPubKey = _combinedPubKey;
        // create unique tx id
        const _salt = Buffer.from(ethers_1.ethers.utils.randomBytes(32));
        const encodedParams = ethers_1.ethers.utils.defaultAbiCoder.encode(["bytes", "bytes", "bytes"], [_combinedPubKey.buffer, opHash, _salt]);
        this.id = ethers_1.ethers.utils.keccak256(encodedParams);
    }
    getOpHash() {
        return this.opHash;
    }
    signMultiSigHash(signer) {
        const op = this.opHash;
        const pk = this._getPublicKeys();
        const pn = this._getPublicNonces();
        const _signatureOutput = signer.signMultiSigHash(op, pk, pn);
        this.signatures[signer.getAddress()] = _signatureOutput;
        return _signatureOutput;
    }
    getSummedSigData() {
        if (!this.combinedPubKey || !this.signatures || this.signers.length < 2)
            throw new Error("Summed signature input data is missing");
        const _signatureOutputs = this._getSignatures();
        const _sigs = _signatureOutputs.map((sig) => sig.signature);
        const _challenges = _signatureOutputs.map((sig) => sig.challenge);
        // sum all signers signatures
        const _summed = (0, schnorr_helpers_1.sumSchnorrSigs)(_sigs);
        // challenge for every signature must be the same - check and if so, assign first one
        const isEveryChallengeEqual = _challenges.every((e) => {
            if (e.toHex() === _challenges[0].toHex())
                return true;
        });
        if (!isEveryChallengeEqual)
            throw new Error("Challenges for all signers should be the same");
        const e = _challenges[0];
        // the multisig px and parity
        const px = ethers_1.ethers.utils.hexlify(this.combinedPubKey.buffer.subarray(1, 33));
        const parity = this.combinedPubKey.buffer[0] - 2 + 27;
        // wrap the result
        const abiCoder = new ethers_1.ethers.utils.AbiCoder();
        const sigData = abiCoder.encode(["bytes32", "bytes32", "bytes32", "uint8"], [px, e.buffer, _summed.buffer, parity]);
        return sigData;
    }
    getAddressSignature(signerAddress) {
        return this._getSignatures()[signerAddress];
    }
    getAddressPublicNonces(signerAddress) {
        return this._getPublicNonces()[signerAddress];
    }
    getAddressPubKeys(signerAddress) {
        return this._getPublicKeys()[signerAddress];
    }
    _getSignatures() {
        return Object.entries(this.signatures).map(([, sig]) => {
            return sig;
        });
    }
    _getPublicNonces() {
        return Object.entries(this.publicNonces).map(([, nonce]) => {
            return nonce;
        });
    }
    _getPublicKeys() {
        return Object.entries(this.publicKeys).map(([, pk]) => {
            return pk;
        });
    }
}
exports.MultiSigUserOpWithSigners = MultiSigUserOpWithSigners;