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import { assert } from '@0x/assert';
import { schemas } from '@0x/json-schemas';
import {
EIP712DomainWithDefaultSchema,
EIP712Object,
EIP712TypedData,
EIP712Types,
Order,
ZeroExTransaction,
} from '@0x/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 domain Domain containing a name (optional), version (optional), and verifying contract address
* @return A typed data object
*/
createTypedData: (
primaryType: string,
types: EIP712Types,
message: EIP712Object,
domain: EIP712DomainWithDefaultSchema,
): EIP712TypedData => {
assert.isETHAddressHex('verifyingContractAddress', domain.verifyingContractAddress);
assert.isString('primaryType', primaryType);
const typedData = {
types: {
EIP712Domain: constants.DEFAULT_DOMAIN_SCHEMA.parameters,
...types,
},
domain: {
name: _.isUndefined(domain.name) ? constants.EXCHANGE_DOMAIN_NAME : domain.name,
version: _.isUndefined(domain.version) ? constants.EXCHANGE_DOMAIN_VERSION : domain.version,
verifyingContract: domain.verifyingContractAddress,
},
message,
primaryType,
};
assert.doesConformToSchema('typedData', typedData, schemas.eip712TypedDataSchema);
return typedData;
},
/**
* Creates an Order EIP712TypedData object for use with signTypedData.
* @param Order the order
* @return A typed data object
*/
createOrderTypedData: (order: Order): EIP712TypedData => {
assert.doesConformToSchema('order', order, schemas.orderSchema, [schemas.hexSchema]);
const normalizedOrder = _.mapValues(order, value => {
return !_.isString(value) ? value.toString() : value;
});
const domain = {
verifyingContractAddress: order.exchangeAddress,
};
const typedData = eip712Utils.createTypedData(
constants.EXCHANGE_ORDER_SCHEMA.name,
{ Order: constants.EXCHANGE_ORDER_SCHEMA.parameters },
normalizedOrder,
domain,
);
return typedData;
},
/**
* Creates an ExecuteTransaction EIP712TypedData object for use with signTypedData and
* 0x Exchange executeTransaction.
* @param ZeroExTransaction the 0x transaction
* @return A typed data object
*/
createZeroExTransactionTypedData: (zeroExTransaction: ZeroExTransaction): EIP712TypedData => {
assert.isETHAddressHex('verifyingContractAddress', zeroExTransaction.verifyingContractAddress);
assert.doesConformToSchema('zeroExTransaction', zeroExTransaction, schemas.zeroExTransactionSchema);
const normalizedTransaction = _.mapValues(zeroExTransaction, value => {
return !_.isString(value) ? value.toString() : value;
});
const domain = {
verifyingContractAddress: zeroExTransaction.verifyingContractAddress,
};
const typedData = eip712Utils.createTypedData(
constants.EXCHANGE_ZEROEX_TRANSACTION_SCHEMA.name,
{ ZeroExTransaction: constants.EXCHANGE_ZEROEX_TRANSACTION_SCHEMA.parameters },
normalizedTransaction,
domain,
);
return typedData;
},
};
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