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getRecentBlockhash RPC Method

Returns a recent block hash from the ledger, and a fee schedule that can be used to compute the cost of submitting a transaction using it.

Deprecated Method

This method is expected to be removed in solana-core v2.0. Please use getLatestBlockhash instead.

Parameters #

string required

Pubkey of account to query, as base-58 encoded string

object optional

Configuration object containing the following fields:

commitment string optional

Result #

An RpcResponse containing a JSON object consisting of a string blockhash and FeeCalculator JSON object.

RpcResponse<object> - RpcResponse JSON object with value field set to a JSON object including:
blockhash: <string> - a Hash as base-58 encoded string
feeCalculator: <object> - FeeCalculator object, the fee schedule for this block hash

Code sample #

curl https://api.devnet.solana.com -X POST -H "Content-Type: application/json" -d '
  {"jsonrpc":"2.0","id":1, "method":"getRecentBlockhash"}
'

Response #

{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "slot": 1
    },
    "value": {
      "blockhash": "CSymwgTNX1j3E4qhKfJAUE41nBWEwXufoYryPbkde5RR",
      "feeCalculator": {
        "lamportsPerSignature": 5000
      }
    }
  },
  "id": 1
}