web3j-evm – web3j执行副总裁区块链毕设代写

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web3j-evm web3j-evm - web3j执行副总裁

Web3j-evm is an embedded freestanding Ethereum EVM and ledger running within a Java process, which can be used for unit and integration testing your Web3j projects.

As everything is local and in-process, there is no need to start up external Ethereum nodes, which helps with easy of use and performance.

Everything runs within the JVM process, including EVM bytecode, which allows for easy debugging of Solidity smart contracts.

Getting started

Often you’d use this together with the web3j-unit project, allowing you to run unit and integration tests without the need to start an Ethereum node.

If you want to use this within our own project directly, you would need the EVM dependency + a few external libraries. Have a look at the example project on how to do this.

repositories {     mavenCentral()     jcenter() }  dependencies {     implementation "org.web3j:core:4.6.3"     implementation "org.web3j:web3j-evm:4.6.3" }

Below is a simple demonstration of ETH transactions, contract deployment and simple contract interactions. Using the ConsoleDebugTracer, we’re able to step through the EVM bytecode, inspect the stack and also see where in the related solidity code we’re currently at.

The demo also show to how get started with the EmbeddedWeb3jService which is what you’d use when building your web3j instance.

This demo is available on the example project.

web3j-evm - web3j执行副总裁

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web3j-evm web3j-evm - web3j执行副总裁

web3jevm是一个运行在Java进程中的嵌入式独立Ethereum evm和ledger,可用于对Web3j项目进行单元和集成测试。

由于所有内容都是本地的和正在处理的,因此无需启动外部以太坊eth节点,这有助于提高易用性和性能。

所有的东西都在JVM进程中运行,包括EVM字节码,这使得Solidity智能合约的调试更加容易。

Getting started

通常您会将它与web3j单元项目一起使用,这样就可以运行单元测试和集成测试,而无需启动以太坊eth节点。

如果您想在我们自己的项目中直接使用它,您需要EVM依赖项+一些外部库。看一看如何做到这一点的示例项目。

repositories {     mavenCentral()     jcenter() }  dependencies {     implementation "org.web3j:core:4.6.3"     implementation "org.web3j:web3j-evm:4.6.3" }

下面是以太币交易、合约部署和简单合约交互的简单演示。使用ConsoleDebugTracer,我们可以单步执行EVM字节码,检查堆栈,还可以查看我们当前在相关的solidity代码中的位置。

演示还展示了如何开始使用嵌入式web3j服务,这是您在构建web3j实例时使用的。

示例项目中提供了此演示。

web3j-evm - web3j执行副总裁

web3j-evm - web3j执行副总裁

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