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Features

Entrypoint contract​

Supports Entrypoint contract releases/v0.8.

Legacy Entrypoint support​

⚠️ If you are using an older version of the EntryPoint contract, please refer to the links below. We only provide support for the most recent release of our software. We strongly recommend updating your smart contract to use Entrypoint releases/v0.8. For more information, see our Security Policy.

Legacy Transeptor bundler releases:

Geth ERC-7562 Tracer​

Supports native tracer to enforce ERC-7562: Account Abstraction Validation Scope Rules.

EIP-7702 authorizations​

On networks with EIP-7702 enabled, the eth_sendUserOperation method accepts an extra eip7702Auth parameter. Transeptor bundler include all UserOperations that require eip7702Auth in a bundle to the authorizationList and executes the bundle using a transaction type 4.

UserOp lifecycle audit trail​

The bundler provides comprehensive audit trail logging to track UserOperations as they progress through the bundle lifecycle. The audit trail captures detailed logging for each stage: userOpReceived, userOpRejected, userOpIncludedInMempool and userOpSubmittedOnChain. Each stage includes timestamps, status changes, error conditions, enabling operators to monitor, debug, and analyze bundler behavior with full traceability. Sensitive data such as signature, callData, factoryData, and eip7702Auth are redacted as 0x_REDACTED in logs to prevent revealing user operation on-chain intent and protect user privacy.

The bundler is configured to disable audit trail by default and can be enabled via the --auditTrail true CLI flag.

Metrics​

Transeptor bundler can be configured to store metrics using a push(InfluxDB) metrics system. Grafana is used to visualize all the metrics. Use --metrics flag to enable. Checkout metric for more information on configuration.

Entity Reputation System​

The bundler can be pre-configured to blacklist(computing) and whitelist(computing) entities on startup.

MEV Protection​

Transeptor bundler supports MEV (Maximal Extractable Value) protection through searcher mode, which sends bundles to Flashbots using eth_sendPrivateTransaction. This prevents front-running and sandwich attacks.

Transaction Modes​

  • Searcher Mode (--txMode searcher): Bundles are sent to Flashbots for MEV protection
  • Base Mode (--txMode base): Bundles are broadcast to the public mempool
MEV Exposure in Base Mode

Running the bundler in base mode will expose transactions to MEV as they are broadcast to the public mempool and can be front-run. For production deployments, it's recommended to use searcher mode for MEV protection.

See more on the support modes on Running Transeptor bundler.

P2P Mempool​

Coming Soon

P2P mempool support is planned for future releases. This feature will enable decentralized UserOperation sharing between bundlers creating a Unified ERC-4337 mempool.