@atomiqlabs/chain-evm/src/evm/spv_swap/EVMSpvWithdrawalData.ts

EVM specific base implementation

import {SpvWithdrawalTransactionData} from "@atomiqlabs/base";
import {Buffer} from "buffer";
import { EVMSpvVaultContract } from "./EVMSpvVaultContract";
import {BitcoinVaultTransactionDataStruct} from "./SpvVaultContractTypechain";
import {AbiCoder, keccak256, ZeroHash} from "ethers";


export class EVMSpvWithdrawalData extends SpvWithdrawalTransactionData {

    private getExecutionHashWith0x() {
        return this.executionHash==null ? ZeroHash : (this.executionHash.startsWith("0x") ? this.executionHash : "0x"+this.executionHash)
    }

    protected fromOpReturnData(data: Buffer): { recipient: string; rawAmounts: bigint[]; executionHash: string } {
        return EVMSpvVaultContract.fromOpReturnData(data);
    }

    isRecipient(address: string): boolean {
        return this.getRecipient().toLowerCase()===address.toLowerCase();
    }

    getFrontingId(): string {
        const callerFee = this.getCallerFee();
        const frontingFee = this.getFrontingFee();
        const txDataHash = keccak256(AbiCoder.defaultAbiCoder().encode(
            ["address", "uint64", "uint64", "uint64", "uint64", "uint64", "uint64", "uint64", "bytes32", "uint256"],
            [this.recipient, this.rawAmounts[0], this.rawAmounts[1], callerFee[0], callerFee[1], frontingFee[0], frontingFee[1], this.getExecutionFee()[0], this.getExecutionHashWith0x(), this.executionExpiry]
        ));
        return keccak256(AbiCoder.defaultAbiCoder().encode(
            ["bytes32", "bytes32"],
            [txDataHash, this.getTxHash()]
        )).substring(2);
    }

    getTxHash(): string {
        return "0x"+Buffer.from(this.btcTx.txid, "hex").reverse().toString("hex");
    }

    getFrontingAmount(): bigint[] {
        return [this.rawAmounts[0] + this.getExecutionFee()[0], this.rawAmounts[1]];
    }

    serialize(): any {
        return {
            type: "EVM",
            ...super.serialize()
        };
    }

    serializeToStruct(): BitcoinVaultTransactionDataStruct {
        const callerFee = this.getCallerFee();
        const frontingFee = this.getFrontingFee();
        const executionFee = this.getExecutionFee();
        return {
            recipient: this.recipient,
            amount0: this.rawAmounts[0],
            amount1: this.rawAmounts[1] ?? 0n,
            callerFee0: callerFee[0],
            callerFee1: callerFee[1] ?? 0n,
            frontingFee0: frontingFee[0],
            frontingFee1: frontingFee[1] ?? 0n,
            executionHandlerFeeAmount0: executionFee[0],
            executionHash: this.getExecutionHashWith0x(),
            executionExpiry: BigInt(this.executionExpiry)
        }
    }

}

SpvWithdrawalTransactionData.deserializers["EVM"] = EVMSpvWithdrawalData;