Problem: automatic signer getter don't support bytes field (cosmos#276)

Solution:
- support bytes fields to support MsgEthereumTx

Update CHANGELOG.md

Signed-off-by: yihuang <huang@crypto.com>

fix test

move changelog

x/tx/CHANGELOG.md

@@ -31,6 +31,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Improvements
+
+* [#276](https://github.com/crypto-org-chain/cosmos-sdk/pull/276) Support bytes in automatic signer getters.
+
 ## v0.13.1
 
 ### Features

x/tx/internal/testpb/signers.proto

@@ -92,7 +92,7 @@ message DeeplyNestedRepeatedSigner {
 
 message BadSigner {
   option (cosmos.msg.v1.signer) = "signer";
-  bytes signer                  = 1;
+  int32 signer                  = 1;
 }
 
 message NoSignerOption {
@@ -107,4 +107,4 @@ message ValidatorSigner {
 service TestSimpleSigner {
   option (cosmos.msg.v1.service) = true;
   rpc TestSimpleSigner(SimpleSigner) returns (SimpleSigner) {}
-}
+}

x/tx/signing/context.go

@@ -297,6 +297,12 @@ func (c *Context) makeGetSignersFunc(descriptor protoreflect.MessageDescriptor)
 				}
 				return arr, nil
 			}
+		case protoreflect.BytesKind:
+			fieldGetters[i] = func(msg proto.Message, arr [][]byte) ([][]byte, error) {
+				addrBz := msg.ProtoReflect().Get(field).Bytes()
+				return append(arr, addrBz), nil
+			}
+
 		default:
 			return nil, fmt.Errorf("unexpected field type %s for field %s in message %s", field.Kind(), fieldName, descriptor.FullName())
 		}