如何加速私有区块链中的 Geth 交易？

Question

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

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

（路径在测试中生成）。

智能合约包装器由 web3j-maven-plugin.

生成

问题是每次 send() 调用需要几秒钟：

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

日志（可以看到1笔交易用了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));

我怎样才能加快调用速度？如果使用 TestRPC 进行测试，则每次调用都需要不到一秒钟的时间！由于 Geth 是从 --dev 开始的，它会自己生成创世文件，所以我无法更改难度。我还可以看到块的开采速度非常快：

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

由于某些原因调用速度不快。我能做什么？

Answer 1

它是 web3j feature/issue，您可以更改此行为： https://github.com/web3j/web3j/issues/231

Answer 2

下面是一个如何在合约中更改 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 那里得到了这个例子。

如何加速私有区块链中的 Geth 交易？

How to speed-up Geth transactions in private blockchain?

blockchain

ethereum

mining

geth