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import { Order, SignedOrder } from '@0x/types';
import { BigNumber } from '@0x/utils';
import { Provider } from 'ethereum-types';
import * as _ from 'lodash';
import { constants } from './constants';
import { orderHashUtils } from './order_hash';
import { generatePseudoRandomSalt } from './salt';
import { signatureUtils } from './signature_utils';
import { CreateOrderOpts } from './types';
export const orderFactory = {
createOrderFromPartial(partialOrder: Partial<Order>): Order {
const defaultOrder = generateEmptyOrder();
return {
...defaultOrder,
...partialOrder,
};
},
createSignedOrderFromPartial(partialSignedOrder: Partial<SignedOrder>): SignedOrder {
const defaultOrder = generateEmptySignedOrder();
return {
...defaultOrder,
...partialSignedOrder,
};
},
createOrder(
makerAddress: string,
makerAssetAmount: BigNumber,
makerAssetData: string,
takerAssetAmount: BigNumber,
takerAssetData: string,
exchangeAddress: string,
createOrderOpts: CreateOrderOpts = generateDefaultCreateOrderOpts(),
): Order {
const defaultCreateOrderOpts = generateDefaultCreateOrderOpts();
const order = {
makerAddress,
makerAssetAmount,
takerAssetAmount,
makerAssetData,
takerAssetData,
exchangeAddress,
takerAddress: createOrderOpts.takerAddress || defaultCreateOrderOpts.takerAddress,
senderAddress: createOrderOpts.senderAddress || defaultCreateOrderOpts.senderAddress,
makerFee: createOrderOpts.makerFee || defaultCreateOrderOpts.makerFee,
takerFee: createOrderOpts.takerFee || defaultCreateOrderOpts.takerFee,
feeRecipientAddress: createOrderOpts.feeRecipientAddress || defaultCreateOrderOpts.feeRecipientAddress,
salt: createOrderOpts.salt || defaultCreateOrderOpts.salt,
expirationTimeSeconds:
createOrderOpts.expirationTimeSeconds || defaultCreateOrderOpts.expirationTimeSeconds,
};
return order;
},
async createSignedOrderAsync(
provider: Provider,
makerAddress: string,
makerAssetAmount: BigNumber,
makerAssetData: string,
takerAssetAmount: BigNumber,
takerAssetData: string,
exchangeAddress: string,
createOrderOpts?: CreateOrderOpts,
): Promise<SignedOrder> {
const order = orderFactory.createOrder(
makerAddress,
makerAssetAmount,
makerAssetData,
takerAssetAmount,
takerAssetData,
exchangeAddress,
createOrderOpts,
);
const orderHash = orderHashUtils.getOrderHashHex(order);
const signature = await signatureUtils.ecSignHashAsync(provider, orderHash, makerAddress);
const signedOrder: SignedOrder = _.assign(order, { signature });
return signedOrder;
},
};
function generateEmptySignedOrder(): SignedOrder {
return {
...generateEmptyOrder(),
signature: constants.NULL_BYTES,
};
}
function generateEmptyOrder(): Order {
return {
senderAddress: constants.NULL_ADDRESS,
makerAddress: constants.NULL_ADDRESS,
takerAddress: constants.NULL_ADDRESS,
makerFee: constants.ZERO_AMOUNT,
takerFee: constants.ZERO_AMOUNT,
makerAssetAmount: constants.ZERO_AMOUNT,
takerAssetAmount: constants.ZERO_AMOUNT,
makerAssetData: constants.NULL_BYTES,
takerAssetData: constants.NULL_BYTES,
salt: generatePseudoRandomSalt(),
exchangeAddress: constants.NULL_ADDRESS,
feeRecipientAddress: constants.NULL_ADDRESS,
expirationTimeSeconds: constants.INFINITE_TIMESTAMP_SEC,
};
}
function generateDefaultCreateOrderOpts(): {
takerAddress: string;
senderAddress: string;
makerFee: BigNumber;
takerFee: BigNumber;
feeRecipientAddress: string;
salt: BigNumber;
expirationTimeSeconds: BigNumber;
} {
return {
takerAddress: constants.NULL_ADDRESS,
senderAddress: constants.NULL_ADDRESS,
makerFee: constants.ZERO_AMOUNT,
takerFee: constants.ZERO_AMOUNT,
feeRecipientAddress: constants.NULL_ADDRESS,
salt: generatePseudoRandomSalt(),
expirationTimeSeconds: constants.INFINITE_TIMESTAMP_SEC,
};
}
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