accounts/abi: handle tuple arrays in ParseSelector (#24587)

Closes #24571

Author: tclairet

accounts/abi/selector_parser.go

@@ -86,6 +86,9 @@ func parseCompositeType(unescapedSelector string) ([]interface{}, string, error)
 	if len(rest) == 0 || rest[0] != ')' {
 		return nil, "", fmt.Errorf("expected ')', got '%s'", rest)
 	}
+	if len(rest) >= 3 && rest[1] == '[' && rest[2] == ']' {
+		return append(result, "[]"), rest[3:], nil
+	}
 	return result, rest[1:], nil
 }
 
@@ -112,7 +115,12 @@ func assembleArgs(args []interface{}) ([]ArgumentMarshaling, error) {
 			if err != nil {
 				return nil, fmt.Errorf("failed to assemble components: %v", err)
 			}
-			arguments = append(arguments, ArgumentMarshaling{name, "tuple", "tuple", subArgs, false})
+			tupleType := "tuple"
+			if len(subArgs) != 0 && subArgs[len(subArgs)-1].Type == "[]" {
+				subArgs = subArgs[:len(subArgs)-1]
+				tupleType = "tuple[]"
+			}
+			arguments = append(arguments, ArgumentMarshaling{name, tupleType, tupleType, subArgs, false})
 		} else {
 			return nil, fmt.Errorf("failed to assemble args: unexpected type %T", arg)
 		}

accounts/abi/selector_parser_test.go

@@ -16,6 +16,8 @@ func TestParseSelector(t *testing.T) {
 				result = append(result, ArgumentMarshaling{name, typeName, typeName, nil, false})
 			} else if components, ok := typeOrComponents.([]ArgumentMarshaling); ok {
 				result = append(result, ArgumentMarshaling{name, "tuple", "tuple", components, false})
+			} else if components, ok := typeOrComponents.([][]ArgumentMarshaling); ok {
+				result = append(result, ArgumentMarshaling{name, "tuple[]", "tuple[]", components[0], false})
 			} else {
 				log.Fatalf("unexpected type %T", typeOrComponents)
 			}
@@ -34,6 +36,13 @@ func TestParseSelector(t *testing.T) {
 		{"singleNest(bytes32,uint8,(uint256,uint256),address)", "singleNest", mkType("bytes32", "uint8", mkType("uint256", "uint256"), "address")},
 		{"multiNest(address,(uint256[],uint256),((address,bytes32),uint256))", "multiNest",
 			mkType("address", mkType("uint256[]", "uint256"), mkType(mkType("address", "bytes32"), "uint256"))},
+		{"arrayNest((uint256,uint256)[],bytes32)", "arrayNest", mkType([][]ArgumentMarshaling{mkType("uint256", "uint256")}, "bytes32")},
+		{"multiArrayNest((uint256,uint256)[],(uint256,uint256)[])", "multiArrayNest",
+			mkType([][]ArgumentMarshaling{mkType("uint256", "uint256")}, [][]ArgumentMarshaling{mkType("uint256", "uint256")})},
+		{"singleArrayNestAndArray((uint256,uint256)[],bytes32[])", "singleArrayNestAndArray",
+			mkType([][]ArgumentMarshaling{mkType("uint256", "uint256")}, "bytes32[]")},
+		{"singleArrayNestWithArrayAndArray((uint256[],address[2],uint8[4][][5])[],bytes32[])", "singleArrayNestWithArrayAndArray",
+			mkType([][]ArgumentMarshaling{mkType("uint256[]", "address[2]", "uint8[4][][5]")}, "bytes32[]")},
 	}
 	for i, tt := range tests {
 		selector, err := ParseSelector(tt.input)