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import { EIP712Object, EIP712TypedData, EIP712Types, Order, ZeroExTransaction } from '@0xproject/types';
import * as _ from 'lodash';
import { constants } from './constants';
export const eip712Utils = {
/**
* Creates a EIP712TypedData object specific to the 0x protocol for use with signTypedData.
* @param primaryType The primary type found in message
* @param types The additional types for the data in message
* @param message The contents of the message
* @param exchangeAddress The address of the exchange contract
* @return A typed data object
*/
createTypedData: (
primaryType: string,
types: EIP712Types,
message: EIP712Object,
exchangeAddress: string,
): EIP712TypedData => {
const typedData = {
types: {
EIP712Domain: constants.EIP712_DOMAIN_SCHEMA.parameters,
...types,
},
domain: {
name: constants.EIP712_DOMAIN_NAME,
version: constants.EIP712_DOMAIN_VERSION,
verifyingContract: exchangeAddress,
},
message,
primaryType,
};
return typedData;
},
/**
* Creates an Order EIP712TypedData object for use with signTypedData.
* @param Order the order
* @return A typed data object
*/
createOrderTypedData: (order: Order): EIP712TypedData => {
const normalizedOrder = _.mapValues(order, value => {
return !_.isString(value) ? value.toString() : value;
});
const typedData = eip712Utils.createTypedData(
constants.EIP712_ORDER_SCHEMA.name,
{ Order: constants.EIP712_ORDER_SCHEMA.parameters },
normalizedOrder,
order.exchangeAddress,
);
return typedData;
},
/**
* Creates an ExecuteTransaction EIP712TypedData object for use with signTypedData and
* 0x Exchange executeTransaction.
* @param ZeroExTransaction the 0x transaction
* @param exchangeAddress The address of the exchange contract
* @return A typed data object
*/
createZeroExTransactionTypedData: (
zeroExTransaction: ZeroExTransaction,
exchangeAddress: string,
): EIP712TypedData => {
const normalizedTransaction = _.mapValues(zeroExTransaction, value => {
return !_.isString(value) ? value.toString() : value;
});
const typedData = eip712Utils.createTypedData(
constants.EIP712_ZEROEX_TRANSACTION_SCHEMA.name,
{ ZeroExTransaction: constants.EIP712_ZEROEX_TRANSACTION_SCHEMA.parameters },
normalizedTransaction,
exchangeAddress,
);
return typedData;
},
};
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