accounts/abi: add support for fixed bytes with size > 32

accounts/abi/argument.go

@@ -206,6 +206,9 @@ func (arguments Arguments) UnpackValues(data []byte) ([]interface{}, error) {
 			// If we have a static tuple, like (uint256, bool, uint256), these are
 			// coded as just like uint256,bool,uint256
 			virtualArgs += getTypeSize(arg.Type)/32 - 1
+		} else if arg.Type.T == FixedBytesTy {
+			// support for fixed bytes with size longer than 32
+			virtualArgs += getTypeSize(arg.Type)/32 - 1
 		}
 		retval = append(retval, marshalledValue)
 	}

accounts/abi/pack.go

@@ -64,7 +64,7 @@ func packElement(t Type, reflectValue reflect.Value) ([]byte, error) {
 		if reflectValue.Kind() == reflect.Array {
 			reflectValue = mustArrayToByteSlice(reflectValue)
 		}
-		return common.RightPadBytes(reflectValue.Bytes(), 32), nil
+		return common.RightPadBytes(reflectValue.Bytes(), (len(reflectValue.Bytes())+31)/32*32), nil
 	default:
 		return []byte{}, fmt.Errorf("Could not pack element, unknown type: %v", t.T)
 	}

accounts/abi/type.go

@@ -391,6 +391,8 @@ func getTypeSize(t Type) int {
 			total += getTypeSize(*elem)
 		}
 		return total
+	} else if t.T == FixedBytesTy {
+		return (t.Size + 31) / 32 * 32
 	}
 	return 32
 }