github.com/gagliardetto/solana-go@v1.11.0/rpc/getLatestBlockhash.go (about)

     1  // Copyright 2021 github.com/gagliardetto
     2  // This file has been modified by github.com/gagliardetto
     3  //
     4  // Copyright 2020 dfuse Platform Inc.
     5  //
     6  // Licensed under the Apache License, Version 2.0 (the "License");
     7  // you may not use this file except in compliance with the License.
     8  // You may obtain a copy of the License at
     9  //
    10  //      http://www.apache.org/licenses/LICENSE-2.0
    11  //
    12  // Unless required by applicable law or agreed to in writing, software
    13  // distributed under the License is distributed on an "AS IS" BASIS,
    14  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15  // See the License for the specific language governing permissions and
    16  // limitations under the License.
    17  package rpc
    18  
    19  import (
    20  	"context"
    21  
    22  	"github.com/gagliardetto/solana-go"
    23  )
    24  
    25  // Returns the latest blockhash.
    26  //
    27  // **NEW: This method is only available in solana-core v1.9 or newer. Please use
    28  // `getRecentBlockhash` for solana-core v1.8**
    29  func (cl *Client) GetLatestBlockhash(
    30  	ctx context.Context,
    31  	commitment CommitmentType, // optional
    32  ) (out *GetLatestBlockhashResult, err error) {
    33  	params := []interface{}{}
    34  	if commitment != "" {
    35  		params = append(params, M{"commitment": commitment})
    36  	}
    37  
    38  	err = cl.rpcClient.CallForInto(ctx, &out, "getLatestBlockhash", params)
    39  	return
    40  }
    41  
    42  type GetLatestBlockhashResult struct {
    43  	RPCContext
    44  	Value *LatestBlockhashResult `json:"value"`
    45  }
    46  
    47  type LatestBlockhashResult struct {
    48  	Blockhash            solana.Hash `json:"blockhash"`
    49  	LastValidBlockHeight uint64      `json:"lastValidBlockHeight"` // Slot.
    50  }