signer/core: don't require capital lettered reference types (#26462)

signer/core/apitypes/types.go

@@ -27,8 +27,6 @@ import (
 	"sort"
 	"strconv"
 	"strings"
-	"unicode"
-	"unicode/utf8"
 
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
@@ -38,7 +36,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 )
 
-var typedDataReferenceTypeRegexp = regexp.MustCompile(`^[A-Z](\w*)(\[\])?$`)
+var typedDataReferenceTypeRegexp = regexp.MustCompile(`^[A-Za-z](\w*)(\[\])?$`)
 
 type ValidationInfo struct {
 	Typ     string `json:"type"`
@@ -224,15 +222,6 @@ func (t *Type) typeName() string {
 	return t.Type
 }
 
-func (t *Type) isReferenceType() bool {
-	if len(t.Type) == 0 {
-		return false
-	}
-	// Reference types must have a leading uppercase character
-	r, _ := utf8.DecodeRuneInString(t.Type)
-	return unicode.IsUpper(r)
-}
-
 type Types map[string][]Type
 
 type TypePriority struct {
@@ -731,16 +720,16 @@ func (t Types) validate() error {
 			if typeKey == typeObj.Type {
 				return fmt.Errorf("type %q cannot reference itself", typeObj.Type)
 			}
-			if typeObj.isReferenceType() {
+			if isPrimitiveTypeValid(typeObj.Type) {
+				continue
+			}
+			// Must be reference type
 			if _, exist := t[typeObj.typeName()]; !exist {
 				return fmt.Errorf("reference type %q is undefined", typeObj.Type)
 			}
 			if !typedDataReferenceTypeRegexp.MatchString(typeObj.Type) {
 				return fmt.Errorf("unknown reference type %q", typeObj.Type)
 			}
-			} else if !isPrimitiveTypeValid(typeObj.Type) {
-				return fmt.Errorf("unknown type %q", typeObj.Type)
-			}
 		}
 	}
 	return nil

signer/core/signed_data_test.go

@@ -848,3 +848,153 @@ func TestGnosisSafe(t *testing.T) {
 		t.Fatal("expected equality")
 	}
 }
+
+var complexTypedDataLCRefType = `
+{
+    "types": {
+        "EIP712Domain": [
+            {
+                "name": "chainId",
+                "type": "uint256"
+            },
+            {
+                "name": "name",
+                "type": "string"
+            },
+            {
+                "name": "verifyingContract",
+                "type": "address"
+            },
+            {
+                "name": "version",
+                "type": "string"
+            }
+        ],
+        "Action": [
+            {
+                "name": "action",
+                "type": "string"
+            },
+            {
+                "name": "params",
+                "type": "string"
+            }
+        ],
+        "cCell": [
+            {
+                "name": "capacity",
+                "type": "string"
+            },
+            {
+                "name": "lock",
+                "type": "string"
+            },
+            {
+                "name": "type",
+                "type": "string"
+            },
+            {
+                "name": "data",
+                "type": "string"
+            },
+            {
+                "name": "extraData",
+                "type": "string"
+            }
+        ],
+        "Transaction": [
+            {
+                "name": "DAS_MESSAGE",
+                "type": "string"
+            },
+            {
+                "name": "inputsCapacity",
+                "type": "string"
+            },
+            {
+                "name": "outputsCapacity",
+                "type": "string"
+            },
+            {
+                "name": "fee",
+                "type": "string"
+            },
+            {
+                "name": "action",
+                "type": "Action"
+            },
+            {
+                "name": "inputs",
+                "type": "cCell[]"
+            },
+            {
+                "name": "outputs",
+                "type": "cCell[]"
+            },
+            {
+                "name": "digest",
+                "type": "bytes32"
+            }
+        ]
+    },
+    "primaryType": "Transaction",
+    "domain": {
+        "chainId": "56",
+        "name": "da.systems",
+        "verifyingContract": "0x0000000000000000000000000000000020210722",
+        "version": "1"
+    },
+    "message": {
+        "DAS_MESSAGE": "SELL mobcion.bit FOR 100000 CKB",
+        "inputsCapacity": "1216.9999 CKB",
+        "outputsCapacity": "1216.9998 CKB",
+        "fee": "0.0001 CKB",
+        "digest": "0x53a6c0f19ec281604607f5d6817e442082ad1882bef0df64d84d3810dae561eb",
+        "action": {
+            "action": "start_account_sale",
+            "params": "0x00"
+        },
+        "inputs": [
+            {
+                "capacity": "218 CKB",
+                "lock": "das-lock,0x01,0x051c152f77f8efa9c7c6d181cc97ee67c165c506...",
+                "type": "account-cell-type,0x01,0x",
+                "data": "{ account: mobcion.bit, expired_at: 1670913958 }",
+                "extraData": "{ status: 0, records_hash: 0x55478d76900611eb079b22088081124ed6c8bae21a05dd1a0d197efcc7c114ce }"
+            }
+        ],
+        "outputs": [
+            {
+                "capacity": "218 CKB",
+                "lock": "das-lock,0x01,0x051c152f77f8efa9c7c6d181cc97ee67c165c506...",
+                "type": "account-cell-type,0x01,0x",
+                "data": "{ account: mobcion.bit, expired_at: 1670913958 }",
+                "extraData": "{ status: 1, records_hash: 0x55478d76900611eb079b22088081124ed6c8bae21a05dd1a0d197efcc7c114ce }"
+            },
+            {
+                "capacity": "201 CKB",
+                "lock": "das-lock,0x01,0x051c152f77f8efa9c7c6d181cc97ee67c165c506...",
+                "type": "account-sale-cell-type,0x01,0x",
+                "data": "0x1209460ef3cb5f1c68ed2c43a3e020eec2d9de6e...",
+                "extraData": ""
+            }
+        ]
+    }
+}
+`
+
+func TestComplexTypedDataWithLowercaseReftype(t *testing.T) {
+	var td apitypes.TypedData
+	err := json.Unmarshal([]byte(complexTypedDataLCRefType), &td)
+	if err != nil {
+		t.Fatalf("unmarshalling failed '%v'", err)
+	}
+	_, sighash, err := sign(td)
+	if err != nil {
+		t.Fatal(err)
+	}
+	expSigHash := common.FromHex("0x49191f910874f0148597204d9076af128d4694a7c4b714f1ccff330b87207bff")
+	if !bytes.Equal(expSigHash, sighash) {
+		t.Fatalf("Error, got %x, wanted %x", sighash, expSigHash)
+	}
+}