getLatestBlockhash

Returns the latest blockhash.

This method will use 30 Compute Units.

---

Parameters

• object optional. Configuration object containing the following fields:

  • commitment string. The level of commitment required for the query. The options include:

    • finalized string.

      • The node will query the most recent block confirmed by the supermajority of the cluster as having reached maximum lockout, meaning the cluster has recognized this block as finalized.

      • confirmed string.

        • The node will query the most recent block that has been voted on by the supermajority of the cluster.

      • processed string.

        • The node will query its most recent block. Note that the block may not be complete.

  • minContextSlot integer. The minimum slot at which the request can be evaluated.

Returns

result The RpcResponse JSON object with the following fields:

• context The information about the current state of the program.

  • apiVersion The version of the Solana RPC API to use.

  • slot An integer representing the slot for which to retrieve the fee calculator.

• value A JSON object with the following fields:

  • blockhash The block hash encoded as base-58 string.

  • lastValidBlockHeight The last block height at which the blockhash will be valid.

// Result
{
	"jsonrpc": "2.0",
	"result": {
		"context": {
			"apiVersion": "2.1.11",
			"slot": 320148671
		},
		"value": {
			"blockhash": "HBVZtYyJnpeWNo3uDL5RfqAjdu5TWrRTcmaVk7sUDc2C",
			"lastValidBlockHeight": 298423682
		}
	},
	"id": 1
}

mainnet

curl https://mainnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","id":1, "method":"getLatestBlockhash", "params": [{"commitment":"processed"}]}'
    

devnet

curl https://devnet.solana.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","id":1, "method":"getLatestBlockhash", "params": [{"commitment":"processed"}]}'