Examples with LocalContractEventContext com.jd.blockchain.contract.jvm.LocalContractEventContext used on opensource projects

Example 1 with LocalContractEventContext

use of com.jd.blockchain.contract.jvm.LocalContractEventContext in project jdchain-core by blockchain-jd-com.

the class ContractEventSendOperationHandle method process.

@Override
public BytesValue process(Operation op, LedgerTransactionContext transactionContext, TransactionRequestExtension request, LedgerQuery ledger, OperationHandleContext opHandleContext, EventManager manager) {
    // 权限校验；
    SecurityPolicy securityPolicy = SecurityContext.getContextUsersPolicy();
    securityPolicy.checkEndpointPermission(TransactionPermission.CONTRACT_OPERATION, MultiIDsPolicy.AT_LEAST_ONE);
    ContractEventSendOperation contractOP = (ContractEventSendOperation) op;
    // 先从账本校验合约的有效性；
    // 注意：必须在前一个区块的数据集中进行校验，因为那是经过共识的数据；从当前新区块链数据集校验则会带来攻击风险：未经共识的合约得到执行；
    ContractAccount contract = ledger.getContractAccountset().getAccount(contractOP.getContractAddress());
    if (null == contract) {
        throw new ContractDoesNotExistException(String.format("Contract doesn't exist! --[Address=%s]", contractOP.getContractAddress()));
    }
    // 校验合约状态
    if (contract.getState() != AccountState.NORMAL) {
        throw new IllegalAccountStateException("Can not call contract[" + contract.getAddress() + "] in " + contract.getState() + " state.");
    }
    ContractLedgerQueryService ledgerQueryService = new ContractLedgerQueryService(ledger);
    LedgerMetadata_V2 metadata = (LedgerMetadata_V2) ledgerQueryService.getLedgerMetadata();
    // 创建合约的账本上下文实例；
    ContractLedgerContext ledgerContext = new ContractLedgerContext(opHandleContext, ledgerQueryService, new MultiLedgerQueryService(ledger));
    UncommittedLedgerQueryService uncommittedLedgerQueryService = new UncommittedLedgerQueryService(transactionContext);
    // 执行权限校验
    securityPolicy.checkDataPermission(contract.getPermission(), DataPermissionType.EXECUTE);
    // 创建合约上下文;
    LocalContractEventContext localContractEventContext = new LocalContractEventContext(request.getTransactionContent().getLedgerHash(), metadata.getContractRuntimeConfig(), contract.getAddress(), contractOP.getEvent());
    localContractEventContext.setArgs(contractOP.getArgs()).setTransactionRequest(request).setLedgerContext(ledgerContext).setVersion(contract.getChainCodeVersion()).setUncommittedLedgerContext(uncommittedLedgerQueryService);
    localContractEventContext.setTxSigners(request.getEndpoints().stream().map(s -> s.getIdentity()).collect(Collectors.toSet()));
    RuntimeContext.disableSecurityManager();
    // 装载合约；
    ContractCode contractCode = ENGINE.setupContract(contract);
    // 处理合约事件；
    BytesValue result = contractCode.processEvent(localContractEventContext);
    // 交易上下文添加衍生操作
    transactionContext.addDerivedOperations(ledgerContext.getDerivedOperations());
    return result;
}