File structure improvements

src/crypt/signOrderPersonal.ts

@@ -0,0 +1,33 @@
+import { ethers } from 'ethers';
+import { Order } from '../types';
+
+const { arrayify, joinSignature, splitSignature } = ethers.utils;
+
+const signOrderPersonal = async (order: Order, signer: ethers.Signer) => {
+  const message = ethers.utils.solidityKeccak256(
+    [
+      'string', 'address', 'address', 'address', 'address',
+      'address', 'uint64', 'uint64', 'uint64', 'uint64', 'uint64', 'uint8',
+    ],
+    [
+      'order',
+      order.senderAddress,
+      order.matcherAddress,
+      order.baseAsset,
+      order.quoteAsset,
+      order.matcherFeeAsset,
+      order.amount,
+      order.price,
+      order.matcherFee,
+      order.nonce,
+      order.expiration,
+      order.buySide,
+    ],
+  );
+  const signature = await signer.signMessage(arrayify(message));
+
+  // NOTE: metamask broke sig.v value and we fix it in next line
+  return joinSignature(splitSignature(signature));
+};
+
+export default signOrderPersonal;