Move order utils to @0xproject/order-utils

1 files changed, 49 insertions, 0 deletions

diff --git a/packages/order-utils/src/order_factory.ts b/packages/order-utils/src/order_factory.ts
new file mode 100644
index 000000000..2759aac81
--- /dev/null
+++ b/packages/order-utils/src/order_factory.ts
@@ -0,0 +1,49 @@
+import { Provider, SignedOrder } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+import * as _ from 'lodash';
+
+import { getOrderHashHex } from './order_hash';
+import { generatePseudoRandomSalt } from './salt';
+import { signOrderHashAsync } from './signature_utils';
+
+const SHOULD_ADD_PERSONAL_MESSAGE_PREFIX = false;
+
+export const orderFactory = {
+    async createSignedOrderAsync(
+        provider: Provider,
+        maker: string,
+        taker: string,
+        makerFee: BigNumber,
+        takerFee: BigNumber,
+        makerTokenAmount: BigNumber,
+        makerTokenAddress: string,
+        takerTokenAmount: BigNumber,
+        takerTokenAddress: string,
+        exchangeContractAddress: string,
+        feeRecipient: string,
+        expirationUnixTimestampSecIfExists?: BigNumber,
+    ): Promise<SignedOrder> {
+        const defaultExpirationUnixTimestampSec = new BigNumber(2524604400); // Close to infinite
+        const expirationUnixTimestampSec = _.isUndefined(expirationUnixTimestampSecIfExists)
+            ? defaultExpirationUnixTimestampSec
+            : expirationUnixTimestampSecIfExists;
+        const order = {
+            maker,
+            taker,
+            makerFee,
+            takerFee,
+            makerTokenAmount,
+            takerTokenAmount,
+            makerTokenAddress,
+            takerTokenAddress,
+            salt: generatePseudoRandomSalt(),
+            exchangeContractAddress,
+            feeRecipient,
+            expirationUnixTimestampSec,
+        };
+        const orderHash = getOrderHashHex(order);
+        const ecSignature = await signOrderHashAsync(provider, orderHash, maker, SHOULD_ADD_PERSONAL_MESSAGE_PREFIX);
+        const signedOrder: SignedOrder = _.assign(order, { ecSignature });
+        return signedOrder;
+    },
+};