Module transport 

Relay transport for fee payer / sponsor support. Relay transport for routing sponsored transactions through a fee payer service.

RelayTransport wraps two transports:

• a default Tempo RPC transport for ordinary requests and sign-only broadcasts.
• a sponsor transport for signing or sign-and-relay raw transaction submissions.

When a single eth_sendRawTransaction or eth_sendRawTransactionSync request is submitted, the raw unsigned Tempo AA transaction is locally preflighted. In SponsorshipMode::SignAndRelay it is re-encoded for the fee-payer service and forwarded to the sponsor, which signs, broadcasts, and returns the transaction hash or sync response. In SponsorshipMode::SignOnly the sponsor signs via eth_signRawTransaction, then the signed raw transaction is broadcast through the default transport using the original submission method. Non-transaction requests are forwarded unchanged to the default transport. JSON-RPC batches containing raw transaction submissions are rejected; use Tempo AA native call batching instead.

Sign-and-relay can forward original request headers to the sponsor; sign-only never forwards them to sponsor signing and preserves them only for the final default-transport broadcast.

Structs

AuthHeaderTransport 🔒

Transport wrapper that applies a configured authorization header to every request.

RelayConnector

Transport connector that combines default and sponsor relay connectors into a RelayTransport.

RelayTransport

A Tempo transport that routes sponsored eth_sendRawTransaction requests.

Enums

SponsorshipMode

How sponsored raw transactions are handled by RelayTransport.

Constants

SEND_METHODS 🔒

SIGN_METHOD 🔒

SPONSOR_SIGNED_TX_HEX_LEN_SLACK 🔒

Traits

RpcService 🔒

Functions

decode_tempo_aa 🔒

decode_tempo_envelope 🔒

decode_unsigned_tempo_aa 🔒

encode_for_fee_payer_service 🔒

extract_raw_transaction 🔒

recover_tempo_aa_signer 🔒

tx_request 🔒

validate_send_raw_request 🔒

validate_signed_tempo_aa 🔒

validate_sponsor_signed_same_payload 🔒

Validate that the sponsor only replaced the fee-payer signature.

validate_sponsor_signed_tx_len 🔒