feat: validateAccountId fn in evm utils

modules/sdk-coin-evm/src/lib/utils.ts

@@ -223,3 +223,52 @@ async function getGasLimitFromRPC(query: Record<string, string>, rpcUrl: string)
 
   return response.body;
 }
+
+export function validateHederaAccountId(address: string): { valid: boolean; error: string | null } {
+  const parts = address.split('.');
+  if (parts.length !== 3) {
+    return {
+      valid: false,
+      error: 'Invalid Hedera Account ID format. Use format: 0.0.12345',
+    };
+  }
+  const [shardStr, realmStr, accountStr] = parts;
+  if (!shardStr || !realmStr || !accountStr) {
+    return {
+      valid: false,
+      error: 'Invalid Hedera Account ID. All parts are required.',
+    };
+  }
+
+  const shard = Number(shardStr);
+  const realm = Number(realmStr);
+  const account = Number(accountStr);
+
+  // Validate all parts are valid non-negative integers within safe range
+  if (
+    !Number.isInteger(shard) ||
+    !Number.isInteger(realm) ||
+    !Number.isInteger(account) ||
+    shard < 0 ||
+    realm < 0 ||
+    account < 0
+  ) {
+    return {
+      valid: false,
+      error: 'Invalid Hedera Account ID. All parts must be non-negative integers.',
+    };
+  }
+
+  // Check for JavaScript safe integer limits (prevents precision loss)
+  if (!Number.isSafeInteger(shard) || !Number.isSafeInteger(realm) || !Number.isSafeInteger(account)) {
+    return {
+      valid: false,
+      error: 'Invalid Hedera Account ID. Values are too large.',
+    };
+  }
+
+  return {
+    valid: true,
+    error: null,
+  };
+}