链码可以与其他链码交互吗？

Question

我正在尝试使用超级账本编写一个应用程序，并且我正在寻找一种与另一个链码的链码进行通信的方法。这在超级账本中可能吗？

我知道在以太坊中可以与其他智能合约进行通信，但在超级账本中也是可以的。我找不到与此相关的任何相关链接。关于如何解决这个问题的任何建议都会非常有帮助。

我查看了编写您的第一个应用程序，但找不到合适的解释。

Answer 1

Chaincode 可以通过利用现有的 API 与其他 chaincode 进行交互，例如ChaincodeStubInterface：

// InvokeChaincode locally calls the specified chaincode `Invoke` using the
// same transaction context; that is, chaincode calling chaincode doesn't
// create a new transaction message.
// If the called chaincode is on the same channel, it simply adds the called
// chaincode read set and write set to the calling transaction.
// If the called chaincode is on a different channel,
// only the Response is returned to the calling chaincode; any PutState calls
// from the called chaincode will not have any effect on the ledger; that is,
// the called chaincode on a different channel will not have its read set
// and write set applied to the transaction. Only the calling chaincode's
// read set and write set will be applied to the transaction. Effectively
// the called chaincode on a different channel is a `Query`, which does not
// participate in state validation checks in subsequent commit phase.
// If `channel` is empty, the caller's channel is assumed.
InvokeChaincode(chaincodeName string, args [][]byte, channel string) pb.Response

以下是如何使用它的示例：

response := stub.InvokeChaincode(chaincodeName, chainCodeArgs, channelName)

当然，peer 应该有权限并安装链代码。