accounts/abi: return error on fixed bytes with size larger than 32 by…

…tes (ethereum#26075) * fixed bytes with size larger than 32 bytes is not allowed * add testcase
gzliudan · Jan 9, 2025 · ad18f10 · ad18f10
1 parent cfe5a86
commit ad18f10
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Showing 2 changed files with 10 additions and 0 deletions.
diff --git a/accounts/abi/type.go b/accounts/abi/type.go
@@ -153,6 +153,9 @@ func NewType(t string, internalType string, components []ArgumentMarshaling) (ty
 		if varSize == 0 {
 			typ.T = BytesTy
 		} else {
+			if varSize > 32 {
+				return Type{}, fmt.Errorf("unsupported arg type: %s", t)
+			}
 			typ.T = FixedBytesTy
 			typ.Size = varSize
 		}

diff --git a/accounts/abi/type_test.go b/accounts/abi/type_test.go
@@ -366,3 +366,10 @@ func TestGetTypeSize(t *testing.T) {
 		}
 	}
 }
+
+func TestNewFixedBytesOver32(t *testing.T) {
+	_, err := NewType("bytes4096", "", nil)
+	if err == nil {
+		t.Errorf("fixed bytes with size over 32 is not spec'd")
+	}
+}