Corda:java.lang.IllegalArgumentException:此AttachmentWithContext未正确初始化

Question

我们的项目中有一个不可替代代币状态和不可替代代币合约的自定义实现。我们正在使用下面的代码来发行我们的自定义不可替代代币。

        Party notary = NotaryUtilitiesKt.getPreferredNotary(getServiceHub(),NotaryUtilitiesKt.firstNotary());
        TransactionBuilder transactionBuilder = new TransactionBuilder(notary);
        IssueTokensUtilitiesKt.addIssueTokens(transactionBuilder, tokensToIssue);
        FlowUtilitiesKt.addTokenTypeJar(tokensToIssue, transactionBuilder);

当试图将上面获得的事务构建器转换为有线事务时(< code > builder . towiretransaction(service hub)；)我们在下面的堆栈跟踪中得到一个错误。

java.lang.IllegalArgumentException: This AttachmentWithContext was not initialised properly. Please ensure all Corda contracts extending existing Corda contracts also implement the Contract base class.
    at net.corda.core.internal.AttachmentWithContext.<init>(AttachmentWithContext.kt:18)
    at net.corda.core.transactions.TransactionBuilder.handleContract(TransactionBuilder.kt:487)
    at net.corda.core.transactions.TransactionBuilder.selectContractAttachmentsAndOutputStateConstraints(TransactionBuilder.kt:359)
    at net.corda.core.transactions.TransactionBuilder.toWireTransactionWithContext(TransactionBuilder.kt:159)
    at net.corda.core.transactions.TransactionBuilder.toWireTransactionWithContext$core(TransactionBuilder.kt:146)
    at net.corda.core.transactions.TransactionBuilder.toWireTransaction(TransactionBuilder.kt:140)

Answer 1

就像Alesandro说的，这个错误似乎指向一个契约类问题。

请确保所有扩展现有Corda合同的Corda合同也实施合同基类。

我会仔细检查您的合约类是否正确实现了合约。如下所示：

class IOUContract : Contract {
companion object {
    @JvmStatic
    val IOU_CONTRACT_ID = "net.corda.training.contracts.IOUContract"
}

来源：https://github.com/corda/samples-kotlin/blob/master/Advanced/obligation-cordapp/contracts-kotlin/src/main/kotlin/net/corda/training/contracts/IOUContract.kt

祝你好运！