Question

我正在使用web3j和Geth测试以太坊智能合约。 Geth正在运行这样的脚本：

PASSFILE=/var/folders/_l/kl9pdj2x50v7416j8htb6w740000gn/T/pwd6597172766860806720.tmp
DATADIR=/var/folders/_l/kl9pdj2x50v7416j8htb6w740000gn/T/geth808290308908087582
IPCPATH=/var/folders/_l/kl9pdj2x50v7416j8htb6w740000gn/T/geth808290308908087582/geth.ipc

geth --datadir $DATADIR account new --password $PASSFILE
geth --datadir $DATADIR \
    --ipcpath $IPCPATH \
    --dev \
    --rpc \
    --mine \
    --networkid 1999

（在测试中生成路径）。

使用web3j-maven-plugin生成智能合约包装器。

问题是每个send()调用都需要几秒钟时间：

private TransactionReceipt deployFeature_() throws Exception {
    logger.info("Deploying feature ...");
    return contract.deployFeature(featureKey).send();
}

log（你可以看到1个事务需要16秒）：

166955 [main] INFO FeatureTest - Deploying feature ...
182006 [main] INFO FeatureTest - Checking feature is listed ...

Web3j通过IPC连接：

web3 = Web3j.build(new UnixIpcService(ipcPath));

如何加快调用？如果使用TestRPC进行测试，每次调用都需要不到一秒的时间！由于Geth以--dev开头，因此它会自动生成创世纪文件，因此我无法改变难度。我也可以看到块开采速度非常快：

INFO [11-09|00:34:39] Commit new mining work                   number=9 txs=0 uncles=0 elapsed=2.000s
INFO [11-09|00:34:39] Successfully sealed new block            number=9 hash=b869ca…870644
INFO [11-09|00:34:39]  block reached canonical chain          number=4 hash=c758a0…a529af
INFO [11-09|00:34:39]  mined potential block                  number=9 hash=b869ca…870644
INFO [11-09|00:34:39] Commit new mining work                   number=10 txs=0 uncles=0 elapsed=84.12µs
INFO [11-09|00:34:40] Successfully sealed new block            number=10 hash=5e81a9…fc1364
INFO [11-09|00:34:40]  block reached canonical chain          number=5  hash=465c2b…78461a
INFO [11-09|00:34:40]  mined potential block                  number=10 hash=5e81a9…fc1364

出于某种原因，调用并不快。我该怎么办？

Answer 1

这是web3j功能/问题，您可以更改此行为： https://github.com/web3j/web3j/issues/231

Answer 2

以下是如何在合同中更改TransactionManager的示例：

// Using RawTransactionManager
TransactionManager transactionManager = new org.web3j.tx.RawTransactionManager(web3j, <credentials>, 40, 500);

// Or using ClientTransactionManager
TransactionManager transactionManager = new org.web3j.tx.ClientTransactionManager(web3j, "0x<fromAddress>", 40, 500);

// Now we'll poll every 500 ms for a transaction response
YourContract contract = YourContract.deploy("0x<contracAddress>", web3j,
        transactionManager, ManagedTransaction.GAS_PRICE, Contract.GAS_LIMIT,
        <initialValue>, <constructorParam1>,...);

我从here得到了这个例子。

如何加快私有区块链中的Geth交易？

2 个答案: