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20 java如何调用solana合约

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java如何调用solana合约，有例子吗

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分类：Solana

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2 个回答

King 3天前

可以用sol4k或solanaj实现，仓库里有具体的例子:

https://github.com/sol4k/sol4k
https://github.com/skynetcap/solanaj

# 例如 sol4k使用方法

## Maven:

```xml
<dependency>
    <groupId>org.sol4k</groupId>
    <artifactId>sol4k</artifactId>
    <version>0.5.3</version>
</dependency>
```
        
## How to use

Create a connection, request the latest blockhash, and submit a SOL transfer transaction from one account to another

```java
val connection = Connection(RpcUrl.DEVNET)
val blockhash = connection.getLatestBlockhash()
val sender = Keypair.fromSecretKey(secretKeyBytes)
val receiver = PublicKey("DxPv2QMA5cWR5Xfg7tXr5YtJ1EEStg5Kiag9HhkY1mSx")
val instruction = TransferInstruction(sender.publicKey, receiver, lamports = 1000)
val message = TransactionMessage.newMessage(sender.publicKey, blockhash, instruction)
val transaction = VersionedTransaction(message)
transaction.sign(sender)
val signature = connection.sendTransaction(transaction)
Check the sol4k-examples repository to find ready-to-use Java examples of sol4k APIs.
```

没那么简单 3天前