import { hexConcat } from '@0x/contracts-test-utils';
import { eip712Utils } from '@0x/order-utils';
import { SignedZeroExTransaction } from '@0x/types';
import { signTypedDataUtils } from '@0x/utils';

export const hashUtils = {
    getApprovalHashBuffer(transaction: SignedZeroExTransaction, verifyingContract: string, txOrigin: string): Buffer {
        const typedData = eip712Utils.createCoordinatorApprovalTypedData(transaction, verifyingContract, txOrigin);
        const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
        return hashBuffer;
    },
    getApprovalHashHex(transaction: SignedZeroExTransaction, verifyingContract: string, txOrigin: string): string {
        const hashHex = hexConcat(hashUtils.getApprovalHashBuffer(transaction, verifyingContract, txOrigin));
        return hashHex;
    },
};