improve(SpokeUtils): Use viem for RelayData hash computation

src/utils/SpokeUtils.ts

@@ -1,8 +1,7 @@
-import { utils as ethersUtils } from "ethers";
+import { encodeAbiParameters, keccak256 } from "viem";
 import { MAX_SAFE_DEPOSIT_ID, ZERO_ADDRESS, ZERO_BYTES } from "../constants";
 import { Deposit, RelayData } from "../interfaces";
 import { toBytes32 } from "./AddressUtils";
-import { keccak256 } from "./common";
 import { BigNumber } from "./BigNumberUtils";
 import { isMessageEmpty } from "./DepositUtils";
 
@@ -35,6 +34,27 @@ export function getDepositRelayData(deposit: Omit<Deposit, "messageHash">): Rela
  * @returns The corresponding RelayData hash.
  */
 export function getRelayDataHash(relayData: RelayData, destinationChainId: number): string {
+  const abi = [
+    {
+      type: "tuple",
+      components: [
+        { type: "bytes32", name: "depositor" },
+        { type: "bytes32", name: "recipient" },
+        { type: "bytes32", name: "exclusiveRelayer" },
+        { type: "bytes32", name: "inputToken" },
+        { type: "bytes32", name: "outputToken" },
+        { type: "uint256", name: "inputAmount" },
+        { type: "uint256", name: "outputAmount" },
+        { type: "uint256", name: "originChainId" },
+        { type: "uint256", name: "depositId" },
+        { type: "uint32", name: "fillDeadline" },
+        { type: "uint32", name: "exclusivityDeadline" },
+        { type: "bytes", name: "message" },
+      ],
+    },
+    { type: "uint256", name: "destinationChainId" },
+  ];
+
   const _relayData = {
     ...relayData,
     depositor: toBytes32(relayData.depositor),
@@ -43,28 +63,8 @@ export function getRelayDataHash(relayData: RelayData, destinationChainId: numbe
     outputToken: toBytes32(relayData.outputToken),
     exclusiveRelayer: toBytes32(relayData.exclusiveRelayer),
   };
-  return keccak256(
-    ethersUtils.defaultAbiCoder.encode(
-      [
-        "tuple(" +
-          "bytes32 depositor," +
-          "bytes32 recipient," +
-          "bytes32 exclusiveRelayer," +
-          "bytes32 inputToken," +
-          "bytes32 outputToken," +
-          "uint256 inputAmount," +
-          "uint256 outputAmount," +
-          "uint256 originChainId," +
-          "uint256 depositId," +
-          "uint32 fillDeadline," +
-          "uint32 exclusivityDeadline," +
-          "bytes message" +
-          ")",
-        "uint256 destinationChainId",
-      ],
-      [_relayData, destinationChainId]
-    )
-  );
+
+  return keccak256(encodeAbiParameters(abi, [_relayData, destinationChainId]));
 }
 
 export function getRelayHashFromEvent(e: RelayData & { destinationChainId: number }): string {
@@ -87,5 +87,5 @@ export function isZeroAddress(address: string): boolean {
 }
 
 export function getMessageHash(message: string): string {
-  return isMessageEmpty(message) ? ZERO_BYTES : keccak256(message);
+  return isMessageEmpty(message) ? ZERO_BYTES : keccak256(message as "0x{string}");
 }