POST /sponsor/send
Receives a base64-encoded, user-signedVersionedTransaction, adds the server’s signature as fee payer, and broadcasts it. The transaction must already carry all required non-server signatures (e.g. the user’s member signature on vaultTransactionCreate + proposalCreate + proposalApprove).
Request
Response
Related: POST /sponsor/close
Reclaims rent from a completed proposal’s vault transaction and proposal accounts back to the multisig’srentCollector (the server). Permissionless on-chain — no user signature required. Called automatically by /execute after a successful execution.

