Update mocked submitRedemptionProof fn\

Add `redemptionTxHash` param it should be a Bitcoin testnet transaction
hash(byte order corresponds to the Bitcoin internal byte order) that was
made from a given wallet to a given redeemer output script. Thanks to
that we can find the tx on the Bitcoin chain and display data in the
dapp.

Author: r-czajkowski

solidity/contracts/bridge/Bridge.sol

@@ -632,11 +632,13 @@ contract Bridge is
 
     function mock__submitRedemptionProof(
         bytes20 walletPubKeyHash,
-        bytes calldata redeemerOutputScript
+        bytes calldata redeemerOutputScript,
+        bytes32 redemptionTxHash
     ) external {
         self.mock__submitRedemptionProof(
             walletPubKeyHash,
-            redeemerOutputScript
+            redeemerOutputScript,
+            redemptionTxHash
         );
     }
 

solidity/contracts/bridge/Redemption.sol

@@ -638,7 +638,8 @@ library Redemption {
     function mock__submitRedemptionProof(
         BridgeState.Storage storage self,
         bytes20 walletPubKeyHash,
-        bytes calldata redeemerOutputScript
+        bytes calldata redeemerOutputScript,
+        bytes32 redemptionTxHash
     ) external {
         uint256 redemptionKey = getRedemptionKey(
             walletPubKeyHash,
@@ -650,7 +651,7 @@ library Redemption {
 
         uint64 redeemableAmount = request.requestedAmount - request.treasuryFee;
         delete self.pendingRedemptions[redemptionKey];
-        emit RedemptionsCompleted(walletPubKeyHash, 0x0);
+        emit RedemptionsCompleted(walletPubKeyHash, redemptionTxHash);
 
         self.bank.decreaseBalance(redeemableAmount);
         self.bank.transferBalance(self.treasury, request.treasuryFee);

solidity/tasks/dapp.ts

@@ -81,9 +81,20 @@ task("dapp:submit-redemption-proof", "Submits a redemption proof")
     undefined,
     types.string
   )
+  .addParam(
+    "redemptionTxHash",
+    "Hash of the redemption transaction on the Bitcoin chain.",
+    undefined,
+    types.string
+  )
   .setAction(async (args, hre) => {
-    const { walletPubKeyHash, redeemerOutputScript } = args
-    await submitRedemptionProof(hre, walletPubKeyHash, redeemerOutputScript)
+    const { walletPubKeyHash, redeemerOutputScript, redemptionTxHash } = args
+    await submitRedemptionProof(
+      hre,
+      walletPubKeyHash,
+      redeemerOutputScript,
+      redemptionTxHash
+    )
   })
 
 task(
@@ -233,14 +244,16 @@ async function submitDepositSweepProof(
 async function submitRedemptionProof(
   hre: HardhatRuntimeEnvironment,
   walletPubKeyHash: string,
-  redeemerOutputScript: string
+  redeemerOutputScript: string,
+  redemptionTxHash: string
 ) {
   const { helpers } = hre
   const bridge = await helpers.contracts.getContract<Bridge>("Bridge")
 
   const tx = await bridge.mock__submitRedemptionProof(
     walletPubKeyHash,
-    redeemerOutputScript
+    redeemerOutputScript,
+    redemptionTxHash
   )
   await tx.wait()