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

# Transaction Parameters

> The Transaction Parameters trigger fires when any transaction or block parameter matches one or more rules you define on the monitored contract.

The **Transaction Parameters** trigger gives you granular control over exactly which transactions produce alerts. You can match on any field of the transaction, receipt, or block — from the sender address and gas price to block-level metadata.

## Use cases

<AccordionGroup>
  <Accordion title="Gas price anomaly detection" icon="gauge">
    Alert when a transaction arrives with an unusually high gas price, which can indicate front-running or a misconfigured bot.
  </Accordion>

  <Accordion title="Large value transfers" icon="coins">
    Fire an alert whenever a transaction carries more than a threshold amount of native token (Value field).
  </Accordion>

  <Accordion title="Specific sender monitoring" icon="user">
    Watch for transactions from a particular address without adding it to a blacklist — useful for monitoring partner wallets or known bots.
  </Accordion>

  <Accordion title="Receipt and status checks" icon="receipt">
    Trigger on receipt fields such as gas used or cumulative gas to catch unexpectedly expensive transactions.
  </Accordion>
</AccordionGroup>

## Configuration

<Steps>
  <Step title="Trigger Name">
    Enter a descriptive label, e.g. `High Gas Price Detected`.
  </Step>

  <Step title="From contract (optional)">
    Toggle **From contract** on to restrict the trigger to transactions that originate from a smart contract (i.e., internal calls), rather than externally owned accounts.
  </Step>

  <Step title="Parameters">
    Configure one or more parameter rules. Each rule consists of:

    | Field         | Description                                                                                 |
    | ------------- | ------------------------------------------------------------------------------------------- |
    | **Parameter** | The transaction/block/receipt field to inspect (see full list below).                       |
    | **Operator**  | Comparison operator: `=`, `!=`, `>`, `>=`, `<`, `<=`, `contains`, `startsWith`, `endsWith`. |
    | **Value**     | The value to compare against.                                                               |

    Enable **Choose multiple parameters** to add additional rules. Multiple rules are combined with AND logic — all rules must match for the trigger to fire.
  </Step>

  <Step title="Severity">
    Choose the alert severity: `Critical`, `High`, `Medium`, `Low`, or `Info`.
  </Step>

  <Step title="Notification Channels">
    Select one or more channels to receive the alert.
  </Step>
</Steps>

## Available parameters

| Parameter                       | Description                                                       |
| ------------------------------- | ----------------------------------------------------------------- |
| **From**                        | Sender address of the transaction.                                |
| **To**                          | Recipient address of the transaction.                             |
| **Value**                       | Native token amount sent with the transaction (in wei).           |
| **Gas**                         | Gas limit set by the sender.                                      |
| **Gas Price**                   | Gas price set by the sender (in wei).                             |
| **Max Fee Per Gas**             | Maximum total fee per gas unit (EIP-1559).                        |
| **Max Priority Fee Per Gas**    | Maximum priority fee (tip) per gas unit (EIP-1559).               |
| **Nonce**                       | Sender's transaction nonce.                                       |
| **Input**                       | Raw calldata of the transaction.                                  |
| **Transaction Hash**            | Unique hash identifying the transaction.                          |
| **Transaction Index**           | Position of the transaction within its block.                     |
| **Transaction Type**            | Transaction type (0 = legacy, 1 = access list, 2 = EIP-1559).     |
| **Timestamp**                   | Unix timestamp of the block containing the transaction.           |
| **Block Number**                | Height of the block containing the transaction.                   |
| **Block Hash**                  | Hash of the block.                                                |
| **Block Gas Limit**             | Maximum gas allowed in the block.                                 |
| **Block Gas Used**              | Total gas used by all transactions in the block.                  |
| **Block Base Fee Per Gas**      | Base fee per gas in the block (EIP-1559).                         |
| **Block Miner**                 | Address of the block producer.                                    |
| **Block Difficulty**            | Proof-of-work difficulty of the block.                            |
| **Block Total Difficulty**      | Cumulative difficulty up to this block.                           |
| **Block Size**                  | Size of the block in bytes.                                       |
| **Block Transaction Count**     | Number of transactions in the block.                              |
| **Block Parent Hash**           | Hash of the parent block.                                         |
| **Block Nonce**                 | Block nonce used in proof-of-work.                                |
| **Block SHA-3 Uncles**          | SHA3 hash of the uncle blocks list.                               |
| **Block State Root**            | Root hash of the state trie after the block.                      |
| **Block Transactions Root**     | Root hash of the transactions trie.                               |
| **Block Receipts Root**         | Root hash of the receipts trie.                                   |
| **Block Logs Bloom**            | Bloom filter for log entries in the block.                        |
| **Block Extra Data**            | Extra data field set by the block producer.                       |
| **Receipt Status**              | Transaction receipt status (1 = success, 0 = failure).            |
| **Receipt Gas Used**            | Gas used by this transaction specifically.                        |
| **Receipt Cumulative Gas Used** | Total gas used in the block up to and including this transaction. |
| **Receipt Effective Gas Price** | Actual gas price paid (base fee + tip).                           |
| **Receipt Contract Address**    | Contract address created by this transaction, if any.             |
| **Receipt Root**                | Post-transaction state root (pre-Byzantium).                      |