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Diffstat (limited to 'packages/contracts/src/utils/order_factory.ts')
-rw-r--r-- | packages/contracts/src/utils/order_factory.ts | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/packages/contracts/src/utils/order_factory.ts b/packages/contracts/src/utils/order_factory.ts new file mode 100644 index 000000000..044e9b865 --- /dev/null +++ b/packages/contracts/src/utils/order_factory.ts @@ -0,0 +1,37 @@ +import { ZeroEx } from '0x.js'; +import { BigNumber } from '@0xproject/utils'; +import * as _ from 'lodash'; + +import { orderUtils } from './order_utils'; +import { signingUtils } from './signing_utils'; +import { SignatureType, SignedOrder, UnsignedOrder } from './types'; + +export class OrderFactory { + private _defaultOrderParams: Partial<UnsignedOrder>; + private _privateKey: Buffer; + constructor(privateKey: Buffer, defaultOrderParams: Partial<UnsignedOrder>) { + this._defaultOrderParams = defaultOrderParams; + this._privateKey = privateKey; + } + public newSignedOrder( + customOrderParams: Partial<UnsignedOrder> = {}, + signatureType: SignatureType = SignatureType.Ecrecover, + ): SignedOrder { + const randomExpiration = new BigNumber(Math.floor((Date.now() + Math.random() * 100000000000) / 1000)); + const order = ({ + senderAddress: ZeroEx.NULL_ADDRESS, + expirationTimeSeconds: randomExpiration, + salt: ZeroEx.generatePseudoRandomSalt(), + takerAddress: ZeroEx.NULL_ADDRESS, + ...this._defaultOrderParams, + ...customOrderParams, + } as any) as UnsignedOrder; + const orderHashBuff = orderUtils.getOrderHashBuff(order); + const signature = signingUtils.signMessage(orderHashBuff, this._privateKey, signatureType); + const signedOrder = { + ...order, + signature: `0x${signature.toString('hex')}`, + }; + return signedOrder; + } +} |