> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Validity Transaction RPC

> Submit a signed raw transaction with validity predicates.

Submits a signed legacy, EIP-2930, or EIP-1559 transaction with predicates that control when Base can include it. EIP-1559 is recommended.

<Warning>
  This experimental method is currently available on Vibenet. The production API contract is not yet confirmed.
</Warning>

## Parameters

Pass two parameters. The first is a signed, serialized transaction. The second contains a non-empty `validity` array.

<RequestExample>
  ```json Request lines wrap expandable theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "base_sendRawTransactionValidity",
    "params": [
      "0x<signed-raw-transaction>",
      {
        "validity": [
          {
            "type": "storage",
            "params": {
              "address": "0x8ba1f109551bD432803012645Ac136ddd64DBA72",
              "slot": "0x8",
              "mask": "0xff",
              "op": "=",
              "value": "0x2a"
            }
          }
        ]
      }
    ]
  }
  ```
</RequestExample>

## Predicates

| Type               | Parameters                                        |
| ------------------ | ------------------------------------------------- |
| `balance`          | `address`, `op`, `value`                          |
| `storage`          | `address`, `slot`, `op`, `value`, optional `mask` |
| `block_number`     | `op`, `value`                                     |
| `flashblock_index` | `op`, `value`                                     |

The supported operators are `<`, `<=`, `=`, `!=`, `>`, and `>=`. Predicate values use `0x`-prefixed hexadecimal strings. The `mask` defaults to all ones.

## Returns

<ResponseField name="result" type="string">
  The 32-byte hash of the submitted transaction.
</ResponseField>

Returning a hash confirms acceptance. It does not confirm inclusion.

## Errors

The method returns JSON-RPC errors. Handle an unavailable method, invalid parameters, and a missing transaction hash.

Error codes and messages are not yet stable.

Read [Predicates and Safety](/specifications/build-transaction/predicates-and-safety) for evaluation rules. Read [Troubleshooting](/specifications/build-transaction/troubleshooting) when a transaction is not included.