realtime_sendRawTransaction

realtime_sendRawTransaction — submit a transaction and receive the receipt in a single call without polling.

Summary

Submits a signed transaction and returns the receipt directly once the transaction is executed — no polling required. This is a drop-in replacement for eth_sendRawTransaction that eliminates the need to poll eth_getTransactionReceipt. When no timeout is supplied, the node uses its 5-second default wait. The public gateway accepts an optional timeout but caps it at 3,000 milliseconds. The gateway routes this method and eth_sendRawTransactionSync through the same synchronous submission handler, so their parameters and receipt behavior are equivalent.

The public MegaETH endpoint supports this method. The standard, node, and gateway layers below identify behavior that differs from a generic Ethereum endpoint.

Parameters

Position	Type	Required	Notes
0	Data	Yes	Hex-encoded signed transaction
1	number	No	Wait timeout in milliseconds; capped at 3000 by the gateway

Result

A transaction receipt object on success:

Field	Type	Notes
transactionHash	Data (32 bytes)	Hash of the submitted transaction
blockHash	Data (32 bytes)	Block containing the transaction
blockNumber	Quantity	Block containing the transaction
from	Data (20 bytes)	Sender address
to	Data (20 bytes)	Recipient address (null for contract creation)
gasUsed	Quantity	Gas consumed by the transaction
status	Quantity	Nonzero for success; zero for revert
logs	Log[]	Event logs emitted during execution
contractAddress	Data (20 bytes)	Deployed contract address, or null

For receipts produced from a streaming mini-block, blockHash can temporarily be the all-ff placeholder until the enclosing EVM block is committed. Refetch the receipt with eth_getTransactionReceipt after block sealing when a canonical block hash is required.

Comparison with Ethereum Standard JSON-RPC

Ethereum Standard

realtime_sendRawTransaction is not part of the core Ethereum execution JSON-RPC API. It is a MegaETH extension.

MegaETH Node Behavior

MegaETH adds this synchronous submission method. It returns a real-time receipt and uses the same node implementation as eth_sendRawTransactionSync.

MegaETH Public Gateway

The gateway routes this name and eth_sendRawTransactionSync through the same synchronous handler. After gateway-side validation, both names are rewritten to the node's realtime_sendRawTransactionWithSender method. The gateway caps explicit waits at 3,000 milliseconds and accepts request bodies up to 2.5 MiB.

Errors

The | Scope | column distinguishes method failures from gateway policy errors.

Code	Scope	Message	When it happens
-32000	Method	Server error	realtime transaction expired — receipt not available before the wait expired
-32099	Transport/policy	Payload too large	The request body exceeds the 2.5 MiB public endpoint limit.

See also Error Codes.

Examples

Endpoint: https://mainnet.megaeth.com/rpc

Capture date: July 24, 2026

Outcome: success

The gateway routes this method and eth_sendRawTransactionSync through the same handler, so their successful receipt responses have the same structure:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "type": "0x0",
    "status": "0x1",
    "transactionHash": "0x8d3b1e22e7a9026c8658b5d922293d59e4de7c3382bb832d6890e6ab23ad7ec7",
    "transactionIndex": "0x5",
    "blockHash": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
    "blockNumber": "0xe7133c",
    "from": "0xcc4b43ab7230cc5913801a746c1834aa06c4e7e7",
    "to": "0xcc4b43ab7230cc5913801a746c1834aa06c4e7e7",
    "gasUsed": "0xea60",
    "effectiveGasPrice": "0xf4240",
    "cumulativeGasUsed": "0x143043",
    "contractAddress": null,
    "logs": [],
    "l1GasPrice": "0x3216",
    "l1GasUsed": "0x640",
    "l1Fee": "0x6da0",
    "l1BaseFeeScalar": "0x558",
    "l1BlobBaseFee": "0x1",
    "l1BlobBaseFeeScalar": "0x0"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32000,
    "message": "realtime transaction expired"
  }
}

Sources

• Spec: EIP-1474 for JSON-RPC framing and error conventions; this method is an extension or legacy compatibility method.
• Code: [email protected]:megaeth-labs/mega-reth.git @ ab60376631228edab3a6df180f295280bad26e93: crates/megaeth/rpc/src/realtime.rs
• Code: [email protected]:megaeth-labs/mega-rpc.git @ 06aa35aa95d569c227cc25d2aa12834eb0458aa0: workers/src/sequencer-guard/single-tx.ts
• Probe: MegaETH Mainnet public endpoint, July 24, 2026