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import { Provider, SignedOrder } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as _ from 'lodash';
import { orderHashUtils } from './order_hash';
import { generatePseudoRandomSalt } from './salt';
import { ecSignOrderHashAsync, getVRSHexString } from './signature_utils';
const SHOULD_ADD_PERSONAL_MESSAGE_PREFIX = false;
export const orderFactory = {
async createSignedOrderAsync(
provider: Provider,
makerAddress: string,
takerAddress: string,
senderAddress: string,
makerFee: BigNumber,
takerFee: BigNumber,
makerAssetAmount: BigNumber,
makerAssetData: string,
takerAssetAmount: BigNumber,
takerAssetData: string,
exchangeAddress: string,
feeRecipientAddress: string,
expirationTimeSecondsIfExists?: BigNumber,
): Promise<SignedOrder> {
const defaultExpirationUnixTimestampSec = new BigNumber(2524604400); // Close to infinite
const expirationTimeSeconds = _.isUndefined(expirationTimeSecondsIfExists)
? defaultExpirationUnixTimestampSec
: expirationTimeSecondsIfExists;
const order = {
makerAddress,
takerAddress,
senderAddress,
makerFee,
takerFee,
makerAssetAmount,
takerAssetAmount,
makerAssetData,
takerAssetData,
salt: generatePseudoRandomSalt(),
exchangeAddress,
feeRecipientAddress,
expirationTimeSeconds,
};
const orderHash = orderHashUtils.getOrderHashHex(order);
const ecSignature = await ecSignOrderHashAsync(
provider,
orderHash,
makerAddress,
SHOULD_ADD_PERSONAL_MESSAGE_PREFIX,
);
const signature = getVRSHexString(ecSignature);
const signedOrder: SignedOrder = _.assign(order, { signature });
return signedOrder;
},
};
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