Last modified: 2024-09-04

submitblock Method

Broadcasts a new block in the NEO network.

You must install the plugin RpcServer before you can invoke the method.

{
  "jsonrpc": "2.0",
  "method": "submitblock",
  "params": [base64],
  "id": 1
}

Parameter Description

base64: A Base64-encoded string of a serialized block.

Example

Request body:

{
  "jsonrpc": "2.0",
  "method": "submitblock",
  "params": ["AAAAACMSKFbGpGl6t7uroMpi2ilhQd84eU/pUrRfQyswXYl76woLOY0oW1z4InfxoKyxFAAB+8FS6cRu2Pm0iaOiD8OMCnLadQEAAMgcAAD6lrDvowCyjK9dBALCmE1fvMuahQFCDEAd8EoEFBcxOLCZfh8w0tUEHHmyn++KzW4I8oeJ1WyMmjHVcolpNzOnAOzXTn/xujwy93gJ9ijvVo6wAF5qC3wCKxEMIQL4L//X3jDpIyMLze0sPNW+yFcufrrL3bnzOipdJpNLixELQRON768CAGUTt7+NSxXGAA7aoUS2kokAAAAAACYcEwAAAAAARzMAAAHNWK7P0zW+HrPTEeHcgAlj39ctnwEAXQMA5AtUAgAAAAwUzViuz9M1vh6z0xHh3IAJY9/XLZ8MFM1Yrs/TNb4es9MR4dyACWPf1y2fE8AMCHRyYW5zZmVyDBS8r0HWhMfUrW7g2Z2pcHudHwyOZkFifVtSOAFCDEADRhUarLK+/BBjhqaWY5ieento21zgkcsUMWNCBWGd+v8a35zatNRgFbUkni4dDNI/BGc3zOgPT6EwroUsgvR+KQwhAv3yei642bBp1hrlpk26E7iWN8VC2MdMXWurST/mONaPC0GVRA14"],
  "id": 1
}

Response body in successful cases:

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
        "hash": "0xbe153a2ef9e9160906f7054ed8f676aa223a826c4ae662ce0fb3f09d38b093c1"
    }
}

Response body in unsuccessful cases:

{
    "jsonrpc": "2.0",
    "id": 1,
    "error": {
        "code": -500,
        "message": "AlreadyExists"
    }
}

Response Description:

When result is false, the block has failed to broadcast and an exception occurs. The following error codes can be expected

Error codes	Message	Description
500	AlreadyExists	Block or transaction already exists and cannot be sent repeatedly.
	OutOfMemory	The memory pool is full and no more transactions can be sent.
	UnableToVerify	The block cannot be validated.
	Invalid	The format or parameter is incorrect
	Expired	The block information is expired
	InsufficientFunds	Insufficient funds
	PolicyFail	The behavior is not allowed (such as blacklist address trading)