从 corda 中的交易中检索帐户名

Question

我在 Corda 中创建了一个流程，它与另外两个分别托管在不同节点上的帐户共享一个状态。在使用 VaultQuery 查询任一参与者的保险库时，它会显示一些 ID 来代替参与者的姓名。流的调用函数的代码是这样的

public SignedTransaction call() throws FlowException {
    AccountService accountService = getServiceHub().cordaService(KeyManagementBackedAccountService.class);

    //Owner Account
    AccountInfo policyOwnerAccountInfo = accountService.accountInfo(policyOwner).get(0).getState().getData();
    PublicKey policyOwnerKey = subFlow(new NewKeyForAccount(policyOwnerAccountInfo.getIdentifier().getId())).getOwningKey();

    //Insurance Company Account
    AccountInfo insurerAccountInfo = accountService.accountInfo(insuranceCompany).get(0).getState().getData();
    AnonymousParty insuranceCompanyAccount = subFlow(new RequestKeyForAccount(insurerAccountInfo));

    //LSP account
    AccountInfo lspAccountInfo = accountService.accountInfo(lsp).get(0).getState().getData();
    AnonymousParty lspAccount = subFlow(new RequestKeyForAccount(lspAccountInfo));

    List<AccountInfo> parties = new ArrayList<>();
    parties.add(insurerAccountInfo);
    parties.add(lspAccountInfo);


    // Step 1. Get a reference to the notary service on our network and our key pair.
    // Note: ongoing work to support multiple notary identities is still in progress.
    final Party notary = getServiceHub().getNetworkMapCache().getNotaryIdentities().get(0);

//        UniqueIdentifier policyLinearId = new UniqueIdentifier(policyID);
    final PolicyState output = new PolicyState(new UniqueIdentifier(), policyID, sellerID, insurerID, policyNo, faceValue, deathBenefits, annualPremium, cashSurrenderValue, policyStartDate,new AnonymousParty(policyOwnerKey), false, Arrays.asList(insuranceCompanyAccount,lspAccount), true);

    progressTracker.setCurrentStep(GENERATING_TRANSACTION);
    final TransactionBuilder builder = new TransactionBuilder(notary);
    //Adding outputState to the transaction
    progressTracker.setCurrentStep(ADDING_POLICY);
    builder.addOutputState(output, PolicyContract.ID);
    builder.addCommand(new PolicyContract.Commands.Create(), Arrays.asList(policyOwnerKey,insuranceCompanyAccount.getOwningKey(),lspAccount.getOwningKey()));

//  self sign Transaction
    progressTracker.setCurrentStep(SIGNING_TRANSACTION);
    builder.verify(getServiceHub());
    SignedTransaction locallySignedTx = getServiceHub().signInitialTransaction(builder, Arrays.asList(getOurIdentity().getOwningKey(),policyOwnerKey));


    progressTracker.setCurrentStep(GATHERING_SIGS);
    FlowSession session = initiateFlow(insurerAccountInfo.getHost());
    List<TransactionSignature> accountToMoveToSignature = (List<TransactionSignature>) subFlow(new CollectSignatureFlow(locallySignedTx,
                    session,insuranceCompanyAccount.getOwningKey()));
    SignedTransaction signedByCounterParty = locallySignedTx.withAdditionalSignatures(accountToMoveToSignature);

    FlowSession session1 = initiateFlow(lspAccountInfo.getHost());
    List<TransactionSignature> accountToMoveToSignature1 = (List<TransactionSignature>) subFlow(new CollectSignatureFlow(signedByCounterParty,
                    session1,lspAccount.getOwningKey()));
    signedByCounterParty = signedByCounterParty.withAdditionalSignatures(accountToMoveToSignature1);

    progressTracker.setCurrentStep(FINALISING_TRANSACTION);
    return subFlow(new FinalityFlow(signedByCounterParty, session,session1));
    getOurIdentity()).collect(Collectors.toList())));
}

有什么方法可以在查询保险库时显示参与者帐户的名称而不是 ID。

Answer 1

这是预期的行为。当我们在状态下使用帐户时，我们使用 AnonymousParty class，它只有一个 public 密钥，而不是合法名称。这符合账户不是 Corda 身份并且没有合法名称的事实。

您需要构建自定义流程来获取帐户名称。您可以借助提供 api 的帐户服务来这样做。这是您可以参考的示例： https://github.com/corda/bootcamp-cordapp/blob/accounts-demo/src/main/java/bootcamp/QuerybyAccount.java

从 corda 中的交易中检索帐户名

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