eth_sendRawTransactionSync

eth_sendRawTransactionSync JSON-RPC reference for MegaETH.

Summary

Submits a signed transaction and returns a receipt once the transaction is included in a block. The public gateway routes this method and realtime_sendRawTransaction through the same synchronous submission handler, with the same parameters and receipt result.

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

Parameters

data Data REQUIRED

Signed raw transaction bytes.

---

timeoutMs number

Client wait budget in milliseconds. When omitted, the node uses its 5-second default; the public gateway caps explicit values at 3000 (3 s).

Result

• transactionHash Hash32

  Transaction hash.
• status Quantity

  A nonzero status indicates success; zero means the transaction reverted but was included on-chain.
• blockHash Hash32

  Containing block hash. A receipt produced from a streaming mini-block can temporarily contain the all-ff placeholder hash until the enclosing EVM block is committed. Refetch the receipt with eth_getTransactionReceipt after block sealing when a canonical block hash is required.
• blockNumber Quantity

  Containing block number.
• from Address

  Sender.
• to Address | null

  Recipient; null for contract creation.
• gasUsed Quantity

  Gas consumed by this transaction.
• effectiveGasPrice Quantity

  Effective gas price.
• contractAddress Address | null

  Created contract address when applicable.
• logs Log[]

  Emitted log entries.

Additional fields include cumulativeGasUsed, logsBloom, type, and L1 fee fields (l1Fee, l1GasPrice, l1GasUsed, etc.).

Comparison with Ethereum Standard JSON-RPC

Ethereum Standard

eth_sendRawTransactionSync is not part of the core Ethereum execution JSON-RPC API. It is a compatibility extension exposed by the MegaETH public gateway.

MegaETH Node Behavior

The current MegaETH node does not register this eth_* alias. Its native synchronous submission method is realtime_sendRawTransaction; the node waits up to 5 seconds by default for a real-time receipt.

MegaETH Public Gateway

The gateway exposes this compatibility name and routes it and realtime_sendRawTransaction through the same handler. Both are rewritten to the node's realtime_sendRawTransactionWithSender method after gateway-side validation. The gateway caps explicit waits at 3,000 milliseconds and accepts request bodies up to 2.5 MiB. An expiry is inconclusive: the transaction may still land.

Errors

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

Code	Scope	Message	When it happens
-32602	Request	Invalid params	Raw transaction is malformed, undecodable, or timeoutMs is invalid
-32000	Method	Server error	Receipt not available before the wait window expired, or the node rejected the transaction
-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

{
  "jsonrpc": "2.0",
  "id": 91,
  "method": "eth_sendRawTransactionSync",
  "params": [
    "0xf86480830f424082ea6094cc4b43ab7230cc5913801a746c1834aa06c4e7e780808231b2a0b8126d2c41a6c7dbd0a9e219233497057bb391e7ee1d628370f9c1456f82b054a06663fde9daa2fae784c3dac1c9a5a973d538e3a12ec9c0e4d3cee9c70ba2b239",
    3000
  ]
}

{
  "jsonrpc": "2.0",
  "id": 91,
  "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"
  }
}

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