Submit Transaction

Endpoint

Method	Path	Input
POST	`/cosmos/tx/v1beta1/txs`	Signed protobuf `TxRaw` bytes in the LCD broadcast envelope

Native signing authority is required. Webapp session/bearer authentication does not sign a chain transaction. CometBFT RPC is an alternative transport; use one transport for the one attempted broadcast.

Parameters

Field	Encoding	Meaning
`tx_bytes`	base64 string	Complete signed `TxRaw` bytes
`mode`	enum string	`BROADCAST_MODE_SYNC` asks for CheckTx admission

A JSON message body is input to transaction construction, not a signed broadcast request. Use current generated protobuf types and exact account/sequence/amounts.

Example

Request

{
  "tx_bytes": "BASE64_OF_SIGNED_TXRAW",
  "mode": "BROADCAST_MODE_SYNC"
}

Response

Inspect tx_response including hash, code, codespace and log. A code of zero in a SYNC response establishes admission only. Observe matching bytes/results at a committed height and check DeliverTx success before treating the action as complete.

Persist the exact bytes/hash and request identity before transport. On timeout or lost acknowledgement observe that identity; never automatically create or resend another transaction. Indexer/read-model confirmation is separate from native inclusion.

Verified scope: native submission contract used by webapp 43bc1086 and TSA 3258529, with official structsd release 96cea3a messages and SDK transport.