Draft: test relayer reward redemption

tests/add_fee_amount.go

@@ -112,4 +112,27 @@ func AddFeeAmount(network network.Network) {
 	amount, err := subnetATeleporterMessenger.CheckRelayerRewardAmount(&bind.CallOpts{}, fundedAddress, mockTokenAddress)
 	Expect(err).Should(BeNil())
 	Expect(amount).Should(Equal(additionalFeeAmount.Add(additionalFeeAmount, initFeeAmount)))
+
+	// Redeem the relayer reward amount
+	balanceBeforeRedemption, err := mockToken.BalanceOf(
+		&bind.CallOpts{}, fundedAddress,
+	)
+	Expect(err).Should(BeNil())
+	// TODO: figure out why the following is reverting with message
+	// "execution reverted: TeleporterMessenger: no reward to redeem"
+	transaction, err := subnetATeleporterMessenger.RedeemRelayerRewards(
+		&bind.TransactOpts{}, fundedAddress,
+	)
+	Expect(err).Should(BeNil())
+	receipt := utils.SendTransactionAndWaitForAcceptance(
+		ctx, subnetAInfo, transaction, true,
+	)
+	Expect(receipt.Status).Should(Equal(1))
+	balanceAfterRedemption, err := mockToken.BalanceOf(
+		&bind.CallOpts{}, fundedAddress,
+	)
+	Expect(err).Should(BeNil())
+	Expect(balanceAfterRedemption).Should(
+		Equal(big.NewInt(0).Add(balanceBeforeRedemption, amount)),
+	)
 }