Update validation.ts

Author: Pymmdrza

src/utils/validation.ts

@@ -1,4 +1,4 @@
-// Bitcoin address validation
+// Bitcoin address validation (no changes)
 export const isBitcoinAddress = (address: string): boolean => {
   // Basic Bitcoin address format validation
   const legacyFormat = /^[1][a-km-zA-HJ-NP-Z1-9]{25,34}$/; // Legacy address format (starts with 1)
@@ -12,21 +12,41 @@ export const isBitcoinAddress = (address: string): boolean => {
   );
 };
 
-// Transaction ID validation
+// Transaction ID validation (modified with heuristic)
 export const isTransactionId = (txid: string): boolean => {
   // Transaction ID must be exactly 64 characters long and contain only hexadecimal characters
   const txidFormat = /^[a-fA-F0-9]{64}$/;
-  return txidFormat.test(txid);
+  if (!txidFormat.test(txid)) {
+    return false; // Not a valid hex format or length
+  }
+
+  // Heuristic: Transaction IDs are less likely to start with 6 consecutive zeros
+  const leadingZeros = txid.substring(0, 6);
+  if (leadingZeros === '000000') {
+    return false; // If it starts with 6 zeros, likely a Block Hash (heuristic)
+  }
+
+  return true; // Likely a Transaction ID based on heuristic
 };
 
-// Block hash validation
+// Block hash validation (modified with heuristic)
 export const isBlockHash = (hash: string): boolean => {
   // Block hash must be exactly 64 characters long and contain only hexadecimal characters
   const blockHashFormat = /^[a-fA-F0-9]{64}$/;
-  return blockHashFormat.test(hash);
+  if (!blockHashFormat.test(hash)) {
+    return false; // Not a valid hex format or length
+  }
+
+  // Heuristic: Block Hashes are more likely to start with 6 consecutive zeros
+  const leadingZeros = hash.substring(0, 6);
+  if (leadingZeros === '000000') {
+    return true; // Likely a Block Hash based on heuristic
+  }
+
+  return false; // Not likely a Block Hash based on heuristic
 };
 
-// Block height validation
+// Block height validation (no changes)
 export const isBlockHeight = (height: number): boolean => {
   // Current Bitcoin block height is around 800,000 as of 2025
   // This is a simple validation to ensure the height is reasonable