# V1 (Deprecated)

During the initial development of Blink, searchers will need to be onboarded for access. Searchers should reach out to <contact@blinklabs.xyz> for access.

### Connecting to Blink's WebSocket

You can connect to Blink's WebSocket via wss\://ethauction.blinklabs.xyz/ws/v1/{$API\_KEY}.

Transactions received via Blink's RPC endpoint will be exposed on the websocket with the signatures removed. They will take the following form.

```json
{
    "type": "transaction_message",
    "payload": {
        "tx_hash": "0x71f6000fa5010015370c8fea1d5cc9842ebe6ca211a7dbeabe89e8a20fa236ca",
        "tx_from": "0x1f9090aae28b8a3dceadf281b0f12828e676c326",
        "tx_to": "0xa47167b4ef1eb584069fa9dbd3e7bba651eb4f19",
        "tx_nonce": 72,
        "tx_data":"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",
        "tx_gas_limit": 21000,
        "tx_gas_price": 64803106236,
        "tx_max_fee_per_gas": 64803106236,
        "tx_max_priority_fee_per_gas": 1500000000,
        "tx_value": 100000000000000,
        "chain_id": 1
    }
}
```

When the transaction is exposed on the websocket the Searcher should determine if there is any value in the transaction and if there is [submit a bid](broken://pages/3ZNieGNXQpeN7Q1G6NCt). You can continue to submit bids on the transaction until it is included on-chain.

Note there is an option for originators to obfuscate the "tx\_from" value.

The transaction will be sent as a private transaction to builders after being exposed on the WebSocket.

#### Golang Structs

```go
type TransactionEvent struct {
	Type    string             `json:"type"`
	Payload TransactionMessage `json:"payload"`
}

type TransactionMessage struct {
	TxHash                 string   `json:"tx_hash"`
	TxFrom                 string   `json:"tx_from"`
	TxTo                   string   `json:"tx_to"`
	TxNonce                int      `json:"tx_nonce"`
	TxData                 string   `json:"tx_data"`
	TxGasLimit             uint64   `json:"tx_gas_limit"`
	TxGasPrice             *big.Int `json:"tx_gas_price"`
	TxMaxFeePerGas         *big.Int `json:"tx_max_fee_per_gas"`
	TxMaxPriorityFeePerGas *big.Int `json:"tx_max_priority_fee_per_gas"`
	TxValue                *big.Int `json:"tx_value"`
	ChainId                *big.Int `json:"chain_id"`
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.blinklabs.xyz/blink/ethereum/searchers/integration/listen-to-transactions/v1-deprecated.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.