Searchers on Signet

Fetching transactions

Mon, 01 Jan 0001 00:00:00 +0000

Transactions can be fetched from Signet’s transaction cache. Fetching transactions is easy with Signet’s Transaction Cache Client. Consult the Parmigiana Quickstart for any other RPC endpoints or contract addresses you might need.

Signed orders

Mon, 01 Jan 0001 00:00:00 +0000

Signed Orders

Constructing Token Transfers

Assemble Data

Create the outputs array specifying the tokens, amounts, recipients, and destination chain IDs. Construct the permit object listing permitted tokens and amounts, along with the nonce and deadline.

Generate Witness Hash

Hash the outputs array to create a witness hash, ensuring the integrity of the transaction details.

Filler

Mon, 01 Jan 0001 00:00:00 +0000

Filler

The Filler struct from signet-orders orchestrates the full order-filling pipeline: fetching pending orders from a source, signing Permit2 fills, and submitting them as bundles. It is the main building block for writing a Signet filler bot.

Example implementation

The signet-filler repository is an example filler built on top of Filler and FeePolicySubmitter. It demonstrates order filtering, metrics, provider setup, and the overall structure of a filler service.

Setup

 bash
 
 
cargo add signet-orders signet-types signet-constants signet-tx-cache
cargo add alloy --features provider-http,signers
cargo add futures-util

Architecture

Filler is generic over three type parameters: