Module broadcaster 

Transaction broadcaster for dYdX v4 protocol.

This module handles gRPC transmission of transactions with automatic retry on sequence mismatch errors. It works in conjunction with TransactionManager to provide reliable transaction delivery.

Retry Logic

Uses the battle-tested [RetryManager] from nautilus-network with exponential backoff. When a transaction fails with “account sequence mismatch” (Cosmos SDK error code 32), the broadcaster:

1. Resyncs the sequence counter from chain
2. Rebuilds the transaction with the new sequence
3. Applies exponential backoff (500ms → 1s → 2s → 4s)
4. Retries up to 5 times

This handles the case where multiple transactions are submitted in parallel and one succeeds before the other, invalidating the sequence.

Structs

TxBroadcaster

Transaction broadcaster responsible for gRPC transmission with retry logic.

Constants

MAX_SEQUENCE_RETRIES

Maximum retries for sequence mismatch errors.

Functions

create_tx_retry_manager

Creates a retry manager configured for blockchain transaction broadcasting.