fix: attribute decoding in cometbft v0.38 (#96)

Co-authored-by: John Letey <[email protected]>

README.md

@@ -102,6 +102,6 @@ abigen --abi ethereum/abi/MessageTransmitter.json --pkg contracts- --type Messag
 ### Useful links
 [Relayer Flow Charts](./docs/flows.md)
 
-[USDC faucet](https://usdcfaucet.com/)
+[USDC faucet](https://faucet.circle.com)
 
 [Circle Docs/Contract Addresses](https://developers.circle.com/stablecoins/docs/evm-smart-contracts)

noble/message_state.go

@@ -27,19 +27,10 @@ func txToMessageState(tx *ctypes.ResultTx) ([]*types.MessageState, error) {
 			var parsed bool
 			var parseErrs error
 			for _, attr := range event.Attributes {
-				decodedKey, err := base64.StdEncoding.DecodeString(attr.Key)
-				if err != nil {
-					parseErrs = errors.Join(parseErrs, fmt.Errorf("failed to decode attribute key: %w", err))
-				}
-				if string(decodedKey) == "message" {
-					decodedValue, err := base64.StdEncoding.DecodeString(attr.Value)
-					if err != nil {
-						parseErrs = errors.Join(parseErrs, fmt.Errorf("error decoding attr.value: %w", err))
-						continue
-					}
-					encoded := decodedValue[1 : len(decodedValue)-1]
+				if attr.Key == "message" {
+					encoded := attr.Value[1 : len(attr.Value)-1]
 					// Because we are using cometBFT v0.38, we need to decode the value twice.
-					rawMessageSentBytes, err := base64.StdEncoding.DecodeString(string(encoded))
+					rawMessageSentBytes, err := base64.StdEncoding.DecodeString(encoded)
 					if err != nil {
 						parseErrs = errors.Join(parseErrs, fmt.Errorf("failed to decode message: %w", err))
 						continue