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getLatestBlockhash RPC Method

Returns the latest blockhash.

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Version Restriction

This method is only available in solana-core v1.9 or newer. Please use getRecentBlockhash for solana-core v1.8 and below.

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Parameters

object optional
Configuration object containing the following fields:commitment string optional
The level of commitment desired when querying stateminContextSlot number optional
The minimum slot that the request can be evaluated at

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Code Sample

curl https://rpc.testnet.soo.network/rpc \
-X POST \
-H "Content-Type: application/json" \
-d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getLatestBlockhash",
  "params": [{
    "commitment": "finalized",
    "minContextSlot": 0
  }]
}'

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Response

{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "slot": 369624
    },
    "value": {
      "blockhash": "5ThJTCxpdn54bk3gBAWKZS4K9ogHEX56WooYbXQDnm3Q",
      "lastValidBlockHeight": 369624
    }
  },
  "id": 1
}

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Result Details

The result is a JSON object with context and value fields:
  • value contains:
    • blockhash: <string>
      • Latest blockhash as a base-58 encoded string
      • Used to identify and verify the current state of the blockchain
    • lastValidBlockHeight: <u64>
      • The last block height at which the blockhash will be valid
      • Defines the expiration point for transactions using this blockhash