1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
import { generatePseudoRandomSalt, orderHashUtils } from '@0xproject/order-utils';
import { Order, SignatureType, SignedOrder } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import { getLatestBlockTimestampAsync } from './block_timestamp';
import { constants } from './constants';
import { signingUtils } from './signing_utils';
export class OrderFactory {
private readonly _defaultOrderParams: Partial<Order>;
private readonly _privateKey: Buffer;
constructor(privateKey: Buffer, defaultOrderParams: Partial<Order>) {
this._defaultOrderParams = defaultOrderParams;
this._privateKey = privateKey;
}
public async newSignedOrderAsync(
customOrderParams: Partial<Order> = {},
signatureType: SignatureType = SignatureType.EthSign,
): Promise<SignedOrder> {
const tenMinutesInSeconds = 10 * 60;
const currentBlockTimestamp = await getLatestBlockTimestampAsync();
const order = ({
senderAddress: constants.NULL_ADDRESS,
expirationTimeSeconds: new BigNumber(currentBlockTimestamp).add(tenMinutesInSeconds),
salt: generatePseudoRandomSalt(),
takerAddress: constants.NULL_ADDRESS,
...this._defaultOrderParams,
...customOrderParams,
} as any) as Order;
const orderHashBuff = orderHashUtils.getOrderHashBuffer(order);
const signature = signingUtils.signMessage(orderHashBuff, this._privateKey, signatureType);
const signedOrder = {
...order,
signature: `0x${signature.toString('hex')}`,
};
return signedOrder;
}
}
|
