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1. Introduction

SOLL is a new compiler for generating Ewasm (Ethereum flavored WebAssembly) files from Solidity and Yul.

To support developers as many as possible, we design projects to not only support more smart contract programming languages, such as Rust and C++ but also support various VMs, such as Ewasm VM and evm. To achieve this goal, in the very first step, we develop SOLL, a compiler for Solidity-based smart contracts running on Ewasm VM.

For application users, please refer to this document. You will know how to use SOLL to generate Ewasm bytecode from your Solidity smart contract or Yul language, and then deploy the Ewasm bytecode to Ethereum Ewasm TestNet.

For developers, we provide another document for explaining the design of SOLL and how to develop and test the functionality of SOLL, please refer to the Developer Guide for more details.

2. Current Status and Limitations

SOLL is still in an early stage, and we’ve not fully supported Solidity and Yul. Please check the features we’ve done and limitations in the following documents.

  • Feature Guide for Solidity
  • Feature Guide for Yul
  • Known Issues

And SOLL integrates Solidity and Yul test contracts from ethereum/solidity.

Here is the pass rate of both language:

The solidity test suite (Total 80 tests from compilation tests):

Expected Passes    : 27 # Solidity has 80 testing contract, and SOLL can pass 27. Unsupported Tests  : 53 # Unimplemented by SOLL Pass Rate: 34%

Yul test suite (Total 499 tests from libyul):

Expected Passes    : 393 # libyul has 499 testing contracts, and SOLL can pass 393. Unsupported Tests  : 106 # Unimplemented by SOLL Pass Rate: 79%

3. Getting Started

To get started with our demonstration, you will need to prepare two components at first.

  • Pre-install Docker and pull our docker image

We provide an image include build and execute environment (recommend). If you don’t want to use docker directly you will need below tools (cmake, llvm, binaryen, xxd, wabt, node.js).

  • SOLL https://github.com/second-state/soll

  • If you want to set up the working environment by yourself, please install the following dependencies:

    • Our docker image is based on Ubuntu 20.04
    • llvm-10-dev
    • llvm-10-tools
    • liblld-10-dev
    • cmake
    • make
    • wget
    • python-psutil
    • binaryen
    • wabt
    • clang-10 or g++-9
  • After SOLL 0.1.1, we use llvm-10 instead of llvm-8, if you want to build the older version of SOLL, please use this docker image: secondstate/soll:0.1.0.

3.1 Preparation

  • Pull official docker image to get an already established build/execute environment.
> docker pull secondstate/soll
  • Get Source Code from Github and checkout to the latest version, 0.1.1.
> git clone --recursive https://github.com/second-state/soll.git > cd soll > git checkout 0.1.1

3.2 Launch Environment

Attach shell to container and bind volume with repositories’ path.

> docker run -it --rm        -v $(pwd)/soll:/root/soll        secondstate/soll

3.3 Build SOLL

Build SOLL(we use cmake with llvm library)

(docker) $ cd ~/soll && mkdir -p build && cd build (docker) $ cmake .. && make

3.4 Tutorial: Compile ERC20 contracts and deploy them on Ewasm testnet

Our original tutorial will deploy Ewasm bytecode on the official TestNet. Unfortunately, the Ewasm TestNet is unavailable now. We’ve moved the original tutorial into Deploy an ERC20 smart contract to Ewasm official TestNet.

For demonstration propose, we provide another Ewasm TestNet which is launched by our DevChain.

DevChain The Second State DevChain features a powerful and easy-to-use virtual machine that can quickly get you started with smart contracts and DApp development. Our devchain supports Ewasm by hera through EVMC interface.

3.4.1 Compile an ERC20 smart contract

SOLL supports two frontend languages including Solidity and Yul. You can use SOLL to generate Ewasm bytecode(.wasm) directly.

3.4.1-1 For Solidity contracts

Create your smart contract files by copying from our demonstration contract “0-0-3.sol”. And execute SOLL to generate Ewasm bytecode(.wasm) and contract ABI.

(docker) $ cd ~ (docker) $ cp ~/soll/doc/examples/0-0-3.sol ~/0-0-3.sol (docker) $ ~/soll/build/tools/soll/soll 0-0-3.sol # The output bytecode is loacted at ~/0-0-3.wasm  # You will need ABI information for interacting with smart contract (docker) $ ~/soll/build/tools/soll/soll --action=EmitABI 0-0-3.sol [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]

We will use “0-0-3.wasm” in the next section to deploy it to Ewasm TestNet.

3.4.1-2 For Yul contracts

Create your smart contract files by copying from our demonstration contract “0-0-6.yul”. And execute SOLL to generate Ewasm bytecode(.wasm) and contract ABI.

(docker) $ cd ~ (docker) $ cp ~/soll/doc/examples/0-0-6.yul ~/0-0-6.yul (docker) $ ~/soll/build/tools/soll/soll -lang=Yul 0-0-6.yul # The output bytecode is loacted at ~/0-0-6.wasm  # 0-0-6.yul is compiled from 0.0.3.sol via Solc. You can retrieve ABI of 0-0-6.yul by the following command: (docker) $ ~/soll/build/tools/soll/soll --action=EmitABI 0-0-3.sol [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]

We will use “0-0-6.wasm” in the next section to deploy it to Ewasm TestNet.

3.4.2 Convert Ewasm bytecodes into text format.

3.4.2-1 Solidity Part: 0-0-3.sol

(soll docker) $ xxd -p ~/soll/doc/examples/0-0-3.wasm | tr -d $'n'

The result should be the same as the following content. (This will be used later)

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

3.4.2-2 Yul Part: 0-0-6.yul

(soll docker) $ xxd -p ~/soll/doc/examples/0-0-6.wasm | tr -d $'n'

The result should be the same as the following content. (This will be used later)

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

Then exit SOLL container goto next step.

3.4.3 Attach to our Ewasm DevChain

  • Pull our devchain docker image.
> docker pull secondstate/devchain:devchain
  • Attach to testnet
> docker run -it secondstate/devchain:devchain attach http://devchain-ewasm.secondstate.io:8545  Welcome to the Travis JavaScript console!  instance: vm/v1.9.2/linux-amd64/go1.10.3 coinbase: 0x7eff122b94897ea5b0e2a9abf47b86337fafebdc at block: 1115129 (Tue, 07 Apr 2020 06:51:46 UTC)  modules: cmt:1.0 eth:1.0 net:1.0 personal:1.0 rpc:1.0 web3:1.0
  • Unlock the demo account with a long expiration time.
> personal.unlockAccount(cmt.accounts[0], '1234', 9999999)

3.4.4 Deploy and execute Ewasm

3.4.4-1 Solidity: 0-0-3.wasm

  • Deploy Ewasm bytecode generated from 0-0-3.sol that has been seen before.
// Paste your bytecode from previous section. > var bytecode = "0x...";  // Set first account as the transaction sender > var fromAccount = personal.listAccounts[0];  // Set contract ABI. Copy from the previous section. > var abi = [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]  // Initialize contract template > var contract = cmt.contract(abi);  // Initialize contractAddress for storing address of deployed contract. > var contractAddress = "0x";  // Initialize txhash for storing transaction hash of deployed contract. > var txhash = "0x";  // Create deployment parameters > var params = {     from: fromAccount,     data: bytecode,     gas: 5000000 };  // Deploy smart contract > contract.new(params,     function(error, result){         if(error) {             console.log("Deploy failed");         } else {             if (result.address) {                 contractAddress = result.address;                 console.log("Contract Address: " + contractAddress);             } else {                 txhash = result.transactionHash;                 console.log("txhash: " + txhash);             }         } });  // The result should be a random hash similar to the following content. txhash: 0x37da6061b71f8cfae71ed8e5f020b54ad805d457be4f4530b36298d6b6ad0c56 {   abi: [{       inputs: [],       payable: false,       stateMutability: "nonpayable",       type: "constructor"   }, {       payable: true,       stateMutability: "payable",       type: "fallback"   }, {       constant: true,       inputs: [{...}],       name: "balanceOf",       outputs: [{...}],       payable: false,       stateMutability: "view",       type: "function"   }, {       constant: false,       inputs: [{...}, {...}],       name: "transfer",       outputs: [{...}],       payable: false,       stateMutability: "nonpayable",       type: "function"   }, {       anonymous: false,       inputs: [{...}, {...}, {...}],       name: "Transfer",       type: "event"   }],   address: undefined,   transactionHash: "0x37da6061b71f8cfae71ed8e5f020b54ad805d457be4f4530b36298d6b6ad0c56" } Contract Address: 0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7
  • Check the transaction receipt of contract deployment.
> cmt.getTransactionReceipt(txhash)  // The result should similar to the following content. {   blockHash: "0xcfea68349c8d30261256130769eb46fdd927391a1f989c86900fc4085319018a",   blockNumber: 1115248,   contractAddress: "0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7",   cumulativeGasUsed: 1519352,   from: "0x7eff122b94897ea5b0e2a9abf47b86337fafebdc",   gasUsed: 1519352,   logs: [],   logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",   status: "0x1",   to: null,   transactionHash: "0x37da6061b71f8cfae71ed8e5f020b54ad805d457be4f4530b36298d6b6ad0c56",   transactionIndex: 0 }
  • You can check the contract deployed was success by getCode(contract address)
> cmt.getCode(contractAddress)  // The result should similar to the following content. "0x0061736d01000000..." (omitted, runtime Ewasm bytecode)
  • Send the transaction to execute a contract function transfer. In this example, we want to transfer 123 tokens from account A to account B

  • Setup transaction parameters:

// Get contract instance via contract address > var contractInstance = contract.at(contractAddress);  // Setup transaction parameters > var txnObject = {     from: fromAccount,     gas: 5000000 };  // Set second account as token receiver > var toAccount = personal.listAccounts[1];  // Set send 123 tokens > var sendValue = 123
  • Before we send the transaction, checking their balances first.
// Get original balance of fromAccount and toAccount > contractInstance.balanceOf.call(fromAccount); 100000000  > contractInstance.balanceOf.call(toAccount); 0
  • Call ERC20.transfer(receiver, value)
> contractInstance.transfer.sendTransaction(toAccount, sendValue, txnObject,     function(error, result){         if(error){             console.log("Error: " + error);         } else {             txhash = result;             console.log("txhash: " + txhash);         } }); // The result should similar to the following content. txhash: 0x566211fa5850ad759c001941eec060f48e0108eac06bbbeb17ad08684cf6c9d9
  • Check their balances again.
// Get after balance of fromAccount and toAccount > contractInstance.balanceOf.call(fromAccount); 99999877 > contractInstance.balanceOf.call(toAccount); 123
  • Verfiy transfer by getTransactionReceipt.
> cmt.getTransactionReceipt(txhash) // The result should similar to the following content. // The logs section will show that we emit an event in the `transfer` function. {   blockHash: "0x8e4e1f7bd15ec484f4e161b97be4b2de08072a4cdca0f617ec7023de9c878e6c",   blockNumber: 1116022,   contractAddress: null,   cumulativeGasUsed: 38225,   from: "0x7eff122b94897ea5b0e2a9abf47b86337fafebdc",   gasUsed: 38225,   logs: [{       address: "0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7",       blockHash: "0x8e4e1f7bd15ec484f4e161b97be4b2de08072a4cdca0f617ec7023de9c878e6c",       blockNumber: 1116022,       data: "0x000000000000000000000000000000000000000000000000000000000000007b",       logIndex: 0,       removed: false,       topics: ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x0000000000000000000000007eff122b94897ea5b0e2a9abf47b86337fafebdc", "0x00000000000000000000000077beb894fc9b0ed41231e51f128a347043960a9d"],       transactionHash: "0x566211fa5850ad759c001941eec060f48e0108eac06bbbeb17ad08684cf6c9d9",       transactionIndex: 0   }],   logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000010000000000000000000000100000000010000000000000000000000800000000000000001000000000000080000000000000000000000000000000000000000000001000000000000000000000000000000000000000000002400000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000",   status: "0x1",   to: "0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7",   transactionHash: "0x566211fa5850ad759c001941eec060f48e0108eac06bbbeb17ad08684cf6c9d9",   transactionIndex: 0 }

3.4.4-2 Yul: 0-0-6.wasm

All steps are the same with 3.4.4-1. You only need to replace the Ewasm bytecode with 0-0-6.wasm.

(Omitted)

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1。简介

SOLL是一个新的编译器,用于从Solidity和Yul生成Ewasm(以太坊eth风格的WebAssembly)文件。为了尽可能多地支持开发人员,我们设计了项目不仅支持更多的智能契约编程语言,如RIST和C++,还支持各种VM,如EWASM VM和EVM。为了实现这个目标,在第一步中,我们开发了SOLL,一个运行在Ewasm虚拟机上的基于Solidity的智能合约的编译器。

对于应用程序用户,请参阅本文档。您将了解如何使用SOLL从Solidity智能合约或Yul语言生成Ewasm字节码,然后将Ewasm字节码部署到以太坊ethEwasm TestNet。

对于开发人员,我们提供了另一个文档来解释SOLL的设计以及如何开发和测试SOLL的功能,请参阅开发人员指南以了解更多详细信息。

SOLL仍处于早期阶段,我们尚未完全支持Solidity和Yul。请检查我们已经完成的功能和以下文档中的限制。

2。当前状态和限制

和SOLL集成了Solidity和来自ethereum/Solidity的Yul测试合同。

  • 关于Dockr的已知功能和安装指南https://github.com/second-state/soll
  • 如果你想自己设置工作环境,请安装以下依赖项:我们的docker映像基于Ubuntu 20.04 llvm-10-dev llvm-10-tools liblld-10-dev cmake make wget python psutil binaryen wabt clang-10或g++-9
  • 我们的docker映像基于Ubuntu 20.04

这是两种语言的通过率:

solidity测试套件(来自编译测试的总共80个测试):

Yul测试套件(libyul总共499个测试):

Expected Passes    : 27 # Solidity has 80 testing contract, and SOLL can pass 27. Unsupported Tests  : 53 # Unimplemented by SOLL Pass Rate: 34%

要开始我们的演示,您首先需要准备两个组件。

Expected Passes    : 393 # libyul has 499 testing contracts, and SOLL can pass 393. Unsupported Tests  : 106 # Unimplemented by SOLL Pass Rate: 79%

3。入门

3.1准备将电子wasm字节码转换为文本格式。

3.4.2-1巩固部分:0-0-3.sol

3.4.2-2 Yul部分:0-0-6.Yul

3.4.3依附我们的电子以云开发链

3.4.4部署和执行电子以军sm

3.4.4部署和执行电子以军sm

3.4.4.4-1固度:0-0-3.wasm

h4>3.4.4-2 Yul:0-0-6.wasm:0-0-6.wasm

基本Cookie
始终处于活动状态
分析cookies
  • 关于Dockr的已知功能和安装指南https://github.com/second-state/soll
  • 如果你想自己设置工作环境,请安装以下依赖项:我们的docker映像基于Ubuntu 20.04 llvm-10-dev llvm-10-tools liblld-10-dev cmake make wget python psutil binaryen wabt clang-10或g++-9
  • 我们的docker映像基于Ubuntu 20.04
  • llvm-10-dev
  • llvm-10-dev
  • cmake
  • wget
  • python psutil
  • binaryen
  • wabt
  • clang-10或g++-9
  • 在soll0.1.1之后,我们使用llvm-10而不是llvm-8,如果您想构建SOLL的旧版本,请使用这个docker映像:secondstate/soll:0.1.0。
  • 获取官方docker映像以获得已建立的构建/执行环境。
  • 从Github获取源代码并签出到最新版本0.1.1。
  • 获取devchain docker图像。
  • 连接到testnet
  • 解锁到期时间较长的演示帐户。
  • 部署以前见过的从0-0-3.sol生成的Ewasm字节码。
  • 查看合同调配的交易回单。
  • 您可以通过getCode(contract address)检查部署的契约是否成功。
  • 发送事务以执行契约功能转移。在本例中,我们希望在发送事务之前将123个令牌从帐户A转移到帐户B
  • 设置事务参数:
  • ,首先检查它们的余额。
  • 致电ERC20。转移(接收方,值)
  • 再次检查其余额。
  • 通过getTransactionReceipt进行转账。在
  • 我们提供一个包含构建和执行环境的映像(推荐)。如果你不想直接使用docker,你需要以下工具(cmake,llvm,binaryen,xxd,wabt,节点.js).

    • llvm-10-dev

    溶液https://github.com/second-state/soll

    • llvm-10-dev
    • cmake
    • 解锁到期时间较长的演示帐户。

    3.1准备将电子wasm字节码转换为文本格式。

    3.4.2-1巩固部分:0-0-3.sol

    3.4.2-2 Yul部分:0-0-6.Yul

    3.4.3依附我们的电子以云开发链

    3.4.4部署和执行电子以军sm

    3.4.4部署和执行电子以军sm

    3.4.4.4-1固度:0-0-3.wasm

    h4>3.4.4-2 Yul:0-0-6.wasm:0-0-6.wasm

    基本Cookie
    始终处于活动状态
    分析cookies
  • 关于Dockr的已知功能和安装指南https://github.com/second-state/soll
  • 如果你想自己设置工作环境,请安装以下依赖项:我们的docker映像基于Ubuntu 20.04 llvm-10-dev llvm-10-tools liblld-10-dev cmake make wget python psutil binaryen wabt clang-10或g++-9
  • 我们的docker映像基于Ubuntu 20.04
  • llvm-10-dev
  • llvm-10-dev
  • cmake
  • wget
  • python psutil
  • binaryen
  • wabt
  • clang-10或g++-9
  • 在soll0.1.1之后,我们使用llvm-10而不是llvm-8,如果您想构建SOLL的旧版本,请使用这个docker映像:secondstate/soll:0.1.0。
  • 获取官方docker映像以获得已建立的构建/执行环境。
  • 从Github获取源代码并签出到最新版本0.1.1。
  • 获取devchain docker图像。
  • 连接到testnet
  • 解锁到期时间较长的演示帐户。
  • 部署以前见过的从0-0-3.sol生成的Ewasm字节码。
  • 查看合同调配的交易回单。
  • 您可以通过getCode(contract address)检查部署的契约是否成功。
  • 发送事务以执行契约功能转移。在本例中,我们希望在发送事务之前将123个令牌从帐户A转移到帐户B
  • 设置事务参数:
  • ,首先检查它们的余额。
  • 致电ERC20。转移(接收方,值)
  • 再次检查其余额。
  • 通过getTransactionReceipt进行转账。在
    • 部署以前见过的从0-0-3.sol生成的Ewasm字节码。
    > docker pull secondstate/soll
    • 查看合同调配的交易回单。
    > git clone --recursive https://github.com/second-state/soll.git > cd soll > git checkout 0.1.1

    3.1准备将电子wasm字节码转换为文本格式。

    3.4.2-1巩固部分:0-0-3.sol

    3.4.2-2 Yul部分:0-0-6.Yul

    3.4.3依附我们的电子以云开发链

    3.4.4部署和执行电子以军sm

    3.4.4部署和执行电子以军sm

    3.4.4.4-1固度:0-0-3.wasm

    h4>3.4.4-2 Yul:0-0-6.wasm:0-0-6.wasm

    基本Cookie
    始终处于活动状态
    分析cookies
  • 关于Dockr的已知功能和安装指南https://github.com/second-state/soll
  • 如果你想自己设置工作环境,请安装以下依赖项:我们的docker映像基于Ubuntu 20.04 llvm-10-dev llvm-10-tools liblld-10-dev cmake make wget python psutil binaryen wabt clang-10或g++-9
  • 我们的docker映像基于Ubuntu 20.04
  • llvm-10-dev
  • llvm-10-dev
  • cmake
  • wget
  • python psutil
  • binaryen
  • wabt
  • clang-10或g++-9
  • 在soll0.1.1之后,我们使用llvm-10而不是llvm-8,如果您想构建SOLL的旧版本,请使用这个docker映像:secondstate/soll:0.1.0。
  • 获取官方docker映像以获得已建立的构建/执行环境。
  • 从Github获取源代码并签出到最新版本0.1.1。
  • 获取devchain docker图像。
  • 连接到testnet
  • 解锁到期时间较长的演示帐户。
  • 部署以前见过的从0-0-3.sol生成的Ewasm字节码。
  • 查看合同调配的交易回单。
  • 您可以通过getCode(contract address)检查部署的契约是否成功。
  • 发送事务以执行契约功能转移。在本例中,我们希望在发送事务之前将123个令牌从帐户A转移到帐户B
  • 设置事务参数:
  • ,首先检查它们的余额。
  • 致电ERC20。转移(接收方,值)
  • 再次检查其余额。
  • 通过getTransactionReceipt进行转账。在
  • 构建SOLL(我们将cmake与llvm库一起使用)

    > docker run -it --rm        -v $(pwd)/soll:/root/soll        secondstate/soll

    3.4.2-1巩固部分:0-0-3.sol

    我们最初的教程将在官方测试网上部署Ewasm字节码。不幸的是,目前Ewasm TestNet不可用。我们已经将最初的教程移到了部署ERC20智能合约到Ewasm官方测试网。

    (docker) $ cd ~/soll && mkdir -p build && cd build (docker) $ cmake .. && make

    3.4.2-2 Yul部分:0-0-6.Yul

    对于演示建议,我们提供了另一个由我们的DevChain启动的Ewasm测试网。

    DevChain第二种状态的DevChain具有功能强大且易于使用的虚拟机,可以快速启动智能合约和DApp开发。我们的devchain通过EVMC接口支持hera的Ewasm。

    SOLL支持两种前端语言,包括Solidity和Yul。您可以使用SOLL直接生成Ewasm字节码(.wasm)。

    3.4.3依附我们的电子以云开发链

    通过复制我们的演示合同“0-0-3.sol”创建智能合约文件。并执行SOLL来生成Ewasm字节码(.wasm)和契约ABI。

    3.4.4部署和执行电子以军sm

    我们将在下一节中使用“0-0-3.wasm”将其部署到Ewasm TestNet。

    (docker) $ cd ~ (docker) $ cp ~/soll/doc/examples/0-0-3.sol ~/0-0-3.sol (docker) $ ~/soll/build/tools/soll/soll 0-0-3.sol # The output bytecode is loacted at ~/0-0-3.wasm  # You will need ABI information for interacting with smart contract (docker) $ ~/soll/build/tools/soll/soll --action=EmitABI 0-0-3.sol [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]

    通过复制我们的示范合同“0-0-6.yul”创建智能合约文件。并执行SOLL来生成Ewasm字节码(.wasm)和契约ABI。

    3.4.4部署和执行电子以军sm

    我们将在下一节中使用“0-0-6.wasm”将其部署到Ewasm TestNet。

    (docker) $ cd ~ (docker) $ cp ~/soll/doc/examples/0-0-6.yul ~/0-0-6.yul (docker) $ ~/soll/build/tools/soll/soll -lang=Yul 0-0-6.yul # The output bytecode is loacted at ~/0-0-6.wasm  # 0-0-6.yul is compiled from 0.0.3.sol via Solc. You can retrieve ABI of 0-0-6.yul by the following command: (docker) $ ~/soll/build/tools/soll/soll --action=EmitABI 0-0-3.sol [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]

    结果应与以下内容相同。(稍后使用)

    3.4.4.4-1固度:0-0-3.wasm

    h4>3.4.4-2 Yul:0-0-6.wasm:0-0-6.wasm

    基本Cookie
    始终处于活动状态
    分析cookies
  • 关于Dockr的已知功能和安装指南https://github.com/second-state/soll
  • 如果你想自己设置工作环境,请安装以下依赖项:我们的docker映像基于Ubuntu 20.04 llvm-10-dev llvm-10-tools liblld-10-dev cmake make wget python psutil binaryen wabt clang-10或g++-9
  • 我们的docker映像基于Ubuntu 20.04
  • llvm-10-dev
  • llvm-10-dev
  • cmake
  • wget
  • python psutil
  • binaryen
  • wabt
  • clang-10或g++-9
  • 在soll0.1.1之后,我们使用llvm-10而不是llvm-8,如果您想构建SOLL的旧版本,请使用这个docker映像:secondstate/soll:0.1.0。
  • 获取官方docker映像以获得已建立的构建/执行环境。
  • 从Github获取源代码并签出到最新版本0.1.1。
  • 获取devchain docker图像。
  • 连接到testnet
  • 解锁到期时间较长的演示帐户。
  • 部署以前见过的从0-0-3.sol生成的Ewasm字节码。
  • 查看合同调配的交易回单。
  • 您可以通过getCode(contract address)检查部署的契约是否成功。
  • 发送事务以执行契约功能转移。在本例中,我们希望在发送事务之前将123个令牌从帐户A转移到帐户B
  • 设置事务参数:
  • ,首先检查它们的余额。
  • 致电ERC20。转移(接收方,值)
  • 再次检查其余额。
  • 通过getTransactionReceipt进行转账。在
  • (soll docker) $ xxd -p ~/soll/doc/examples/0-0-3.wasm | tr -d $'n'

    结果应与以下内容相同。(稍后将使用)

    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

    基本Cookie

    (soll docker) $ xxd -p ~/soll/doc/examples/0-0-6.wasm | tr -d $'n'

    然后退出SOLL container转到下一步。

    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

    发送事务以执行合同功能转移。在本例中,我们希望将123个令牌从帐户A转移到帐户B

    始终处于活动状态

    • 您可以通过getCode(contract address)检查部署的契约是否成功。
    > docker pull secondstate/devchain:devchain
    • 发送事务以执行契约功能转移。在本例中,我们希望在发送事务之前将123个令牌从帐户A转移到帐户B
    > docker run -it secondstate/devchain:devchain attach http://devchain-ewasm.secondstate.io:8545  Welcome to the Travis JavaScript console!  instance: vm/v1.9.2/linux-amd64/go1.10.3 coinbase: 0x7eff122b94897ea5b0e2a9abf47b86337fafebdc at block: 1115129 (Tue, 07 Apr 2020 06:51:46 UTC)  modules: cmt:1.0 eth:1.0 net:1.0 personal:1.0 rpc:1.0 web3:1.0
    • 设置事务参数:
    > personal.unlockAccount(cmt.accounts[0], '1234', 9999999)

    分析cookies

    3.4.4-1 Solidity: 0-0-3.wasm

    • ,首先检查它们的余额。
    // Paste your bytecode from previous section. > var bytecode = "0x...";  // Set first account as the transaction sender > var fromAccount = personal.listAccounts[0];  // Set contract ABI. Copy from the previous section. > var abi = [{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]  // Initialize contract template > var contract = cmt.contract(abi);  // Initialize contractAddress for storing address of deployed contract. > var contractAddress = "0x";  // Initialize txhash for storing transaction hash of deployed contract. > var txhash = "0x";  // Create deployment parameters > var params = {     from: fromAccount,     data: bytecode,     gas: 5000000 };  // Deploy smart contract > contract.new(params,     function(error, result){         if(error) {             console.log("Deploy failed");         } else {             if (result.address) {                 contractAddress = result.address;                 console.log("Contract Address: " + contractAddress);             } else {                 txhash = result.transactionHash;                 console.log("txhash: " + txhash);             }         } });  // The result should be a random hash similar to the following content. txhash: 0x37da6061b71f8cfae71ed8e5f020b54ad805d457be4f4530b36298d6b6ad0c56 {   abi: [{       inputs: [],       payable: false,       stateMutability: "nonpayable",       type: "constructor"   }, {       payable: true,       stateMutability: "payable",       type: "fallback"   }, {       constant: true,       inputs: [{...}],       name: "balanceOf",       outputs: [{...}],       payable: false,       stateMutability: "view",       type: "function"   }, {       constant: false,       inputs: [{...}, {...}],       name: "transfer",       outputs: [{...}],       payable: false,       stateMutability: "nonpayable",       type: "function"   }, {       anonymous: false,       inputs: [{...}, {...}, {...}],       name: "Transfer",       type: "event"   }],   address: undefined,   transactionHash: "0x37da6061b71f8cfae71ed8e5f020b54ad805d457be4f4530b36298d6b6ad0c56" } Contract Address: 0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7
    • 致电ERC20。转移(接收方,值)
    > cmt.getTransactionReceipt(txhash)  // The result should similar to the following content. {   blockHash: "0xcfea68349c8d30261256130769eb46fdd927391a1f989c86900fc4085319018a",   blockNumber: 1115248,   contractAddress: "0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7",   cumulativeGasUsed: 1519352,   from: "0x7eff122b94897ea5b0e2a9abf47b86337fafebdc",   gasUsed: 1519352,   logs: [],   logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",   status: "0x1",   to: null,   transactionHash: "0x37da6061b71f8cfae71ed8e5f020b54ad805d457be4f4530b36298d6b6ad0c56",   transactionIndex: 0 }
    • 再次检查其余额。
    > cmt.getCode(contractAddress)  // The result should similar to the following content. "0x0061736d01000000..." (omitted, runtime Ewasm bytecode)
    • 通过getTransactionReceipt进行转账。在
    • 所有步骤与3.4.4-1相同。您只需要将Ewasm字节码替换为0-0-6.wasm。

    // Get contract instance via contract address > var contractInstance = contract.at(contractAddress);  // Setup transaction parameters > var txnObject = {     from: fromAccount,     gas: 5000000 };  // Set second account as token receiver > var toAccount = personal.listAccounts[1];  // Set send 123 tokens > var sendValue = 123
    • Before we send the transaction, checking their balances first.
    // Get original balance of fromAccount and toAccount > contractInstance.balanceOf.call(fromAccount); 100000000  > contractInstance.balanceOf.call(toAccount); 0
    • Call ERC20.transfer(receiver, value)
    > contractInstance.transfer.sendTransaction(toAccount, sendValue, txnObject,     function(error, result){         if(error){             console.log("Error: " + error);         } else {             txhash = result;             console.log("txhash: " + txhash);         } }); // The result should similar to the following content. txhash: 0x566211fa5850ad759c001941eec060f48e0108eac06bbbeb17ad08684cf6c9d9
    • Check their balances again.
    // Get after balance of fromAccount and toAccount > contractInstance.balanceOf.call(fromAccount); 99999877 > contractInstance.balanceOf.call(toAccount); 123
    • Verfiy transfer by getTransactionReceipt.
    > cmt.getTransactionReceipt(txhash) // The result should similar to the following content. // The logs section will show that we emit an event in the `transfer` function. {   blockHash: "0x8e4e1f7bd15ec484f4e161b97be4b2de08072a4cdca0f617ec7023de9c878e6c",   blockNumber: 1116022,   contractAddress: null,   cumulativeGasUsed: 38225,   from: "0x7eff122b94897ea5b0e2a9abf47b86337fafebdc",   gasUsed: 38225,   logs: [{       address: "0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7",       blockHash: "0x8e4e1f7bd15ec484f4e161b97be4b2de08072a4cdca0f617ec7023de9c878e6c",       blockNumber: 1116022,       data: "0x000000000000000000000000000000000000000000000000000000000000007b",       logIndex: 0,       removed: false,       topics: ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x0000000000000000000000007eff122b94897ea5b0e2a9abf47b86337fafebdc", "0x00000000000000000000000077beb894fc9b0ed41231e51f128a347043960a9d"],       transactionHash: "0x566211fa5850ad759c001941eec060f48e0108eac06bbbeb17ad08684cf6c9d9",       transactionIndex: 0   }],   logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000010000000000000000000000100000000010000000000000000000000800000000000000001000000000000080000000000000000000000000000000000000000000001000000000000000000000000000000000000000000002400000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000",   status: "0x1",   to: "0xb606a9622b2dd1fbca5b0eece5c454260e3adaf7",   transactionHash: "0x566211fa5850ad759c001941eec060f48e0108eac06bbbeb17ad08684cf6c9d9",   transactionIndex: 0 }

    3.4.4-2 Yul: 0-0-6.wasm

    (略)

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