@atomiqlabs/chain-starknet
Version:
Starknet specific base implementation
51 lines (50 loc) • 2.46 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.IBitcoinClaimHandler = void 0;
const starknet_1 = require("starknet");
const StarknetBtcRelay_1 = require("../../../../btcrelay/StarknetBtcRelay");
const Utils_1 = require("../../../../../utils/Utils");
const logger = (0, Utils_1.getLogger)("IBitcoinClaimHandler: ");
class IBitcoinClaimHandler {
constructor(address) {
this.address = address;
}
serializeCommitment(data) {
return [
data.confirmations,
data.btcRelay.contract.address
];
}
getCommitment(data) {
return starknet_1.hash.computePoseidonHashOnElements(this.serializeCommitment(data));
}
async _getWitness(signer, swapData, { tx, btcRelay, commitedHeader, synchronizer, requiredConfirmations }, commitment, feeRate) {
const serializedData = this.serializeCommitment({
...commitment,
btcRelay,
confirmations: requiredConfirmations
});
const commitmentHash = starknet_1.hash.computePoseidonHashOnElements(serializedData);
if (!swapData.isClaimData(commitmentHash))
throw new Error("Invalid commit data");
const merkleProof = await btcRelay._bitcoinRpc.getMerkleProof(tx.txid, tx.blockhash);
if (merkleProof == null)
throw new Error(`Failed to generate merkle proof for tx: ${tx.txid}!`);
logger.debug("getWitness(): merkle proof computed: ", merkleProof);
const txs = [];
if (commitedHeader == null) {
const headers = await StarknetBtcRelay_1.StarknetBtcRelay.getCommitedHeadersAndSynchronize(signer, btcRelay, [{ blockheight: tx.height, requiredConfirmations, blockhash: tx.blockhash }], txs, synchronizer, feeRate);
if (headers == null)
throw new Error("Cannot fetch committed header!");
commitedHeader = headers[tx.blockhash];
}
serializedData.push(...commitedHeader.serialize());
serializedData.push(merkleProof.merkle.length, ...merkleProof.merkle.map(Utils_1.bufferToU32Array).flat());
serializedData.push(merkleProof.pos);
return { initialTxns: txs, witness: serializedData };
}
parseWitnessResult(result) {
return (0, Utils_1.u32ArrayToBuffer)(result).toString("hex");
}
}
exports.IBitcoinClaimHandler = IBitcoinClaimHandler;