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EtherEaseWithFMZのチュートリアル

FMZ を使って簡単な入門 エーサインベースのweb3開発

イーサリアム (Ethereum) は,ブロックチェーン技術に基づくスマートコントラクトプラットフォームで,スマートコントラクトを書き,配備するための分散された方法を提供している.スマートコントラクトは,ブロックチェーン上で自動的に実行できる特殊なコンピュータプログラムであり,第三者に信頼する必要がない限り,あらゆるビジネスロジックを実現できる.

発明者定量化取引プラットフォームFMZ.COM開発者がイーサリアム・ブロックチェーンとそのエコシステムとより簡単にやり取りできるように,使いやすいAPIを提供している.DEXにアクセスし,チェーン上のデータを取得し,取引を送信するなどの機能を実現している.

このレッスンの例はJavaScript言語作成,テスト環境の使用イーサリアム・ネット、ゲーリ・テスト・ネット■ FMZプラットフォームのAPIドキュメントでは,教科書で使用されたAPIインターフェースとその関連説明やコード例を見ることができます.

FMZへのアクセス

FMZの量化取引プラットフォームを使用する方法を学ぶ前に,いくつかの基本的な概念を熟知する必要があります.

1 FMZ量化取引プラットフォームのアーキテクチャー

FMZの定量化取引プラットフォームの公式WEBhttps://www.fmz.comFMZのウェブサイトはシステム全体の管理端であり,ユーザが作成したプログラムは実際にホストで実行されます.ホストのソフトウェアプログラムは,サーバー,コンピュータなど,さまざまなデバイスに展開できます. ユーザーがFMZのウェブサイトで実行例を作成するために適切なプログラムを記述すると,FMZプラットフォームはホストと通信し,ホストでプログラムインスタンスを起動します.

2 管理者

プログラムインスタンスを実行するには,ホストをデプロイする必要があります.ホストのデプロイも非常に簡単で,プラットフォーム上でデプロイチュアルがあります.また,FMZで提供されている"ワンキーデプロイ管理者"を使用して,FMZの代わりにレンタルサーバーを使用して自動的にデプロイできます.

• パーソナルデバイスにホストを展開する

  サーバー,PCなどのデバイスに管理者プログラムを展開することができる.ネットワークが正常であることを保証する限り, (取引所のインターフェース,ノードアドレスなど,対応するターゲットにアクセスする必要がある) 展開の主なステップは:

  1 管理者プログラムを展開するデバイスにログインまたは起動します.サーバーにログインする可能性はコンピュータを起動してOSにアクセスします│ │ 2、対応バージョンのホストプログラムをダウンロード (デバイスのオペレーティングシステムによって異なります).https://www.fmz.com/m/add-node 3、ダウンロードは圧縮パックで,解圧が必要です. 4 この管理プログラムを実行する際に,管理者はrobot管理者の通信アドレスを設定します. この通信アドレスは,各FMZアカウントにユニークです.https://www.fmz.com/m/add-nodeこのページでは,自分の住所を見ることができます../robot -s node.fmz.com/xxxxxこのアドレス列は,ここです.xxxxx位置の内容は,各FMZアカウントが異なる) ;最後に,FMZアカウントのパスワードを入力し,それらを設定し,管理者プログラムを実行することができます.

• FMZプラットフォームの"ワンキーデプロイ管理者"機能を使用

  FMZプラットフォームにホストページを追加しました.https://www.fmz.com/m/add-node

  

3 デュッキングツール

FMZの量化取引プラットフォームは,無料のデュッキングツールを提供し,JavaScript，TypeScriptこのページは:https://www.fmz.com/m/debugインストーメントの作成は料金がかかるため,初学期にこのデミットメントツールを使用してテスト,学習を行うことができます. デミットメントツールは,最大3分までの実行時間を制限する以外は,インスタンスの作成と異なるものではありません.

使用するTypeScript言語では,コードの最初の行に書き込む必要があります.// @ts-checkコンピュータを切り替えるTypeScript選択してください.JavaScript言語は.

4 取引所

FMZでは"取引所"は汎用的な概念であり,CEX取引所では特定の取引所のアカウント設定を指します.web3では,この取引所はノードアドレス,プライベートキー設定を含む設定情報を指します.

オンラインで放送されているFMZの動画は,https://www.fmz.com/m/add-platformこのページでは,取引所の情報を配置できます.

選択するWeb3RPCノードアドレスを設定し,プライベートキーを設定する場合は,右下に"敏感な情報を独立したプライベートキーを用いて暗号化する"をクリックしてセキュリティメカニズムを見る.

ノードは自作ノードまたはノードサーバーによって提供されるノードを使用できます.インフュラ・登録後,自分のアカウントのノードアドレスを確認できます. ・ホームネット,テストネットは,比較して便利です. このノードアドレスを上図で設定します.Rpc Address設定された取引所のオブジェクトを区別するために,タグが自分の名前を付けることができます.

図でhttps://mainnet.infura.io/v3/xxxxxxxxxxxxxプライベートなInfuraのETHメインネットワークのRPCノードの住所です.

FMZとイーサリアンを使ってやり取りする

在部署好托管者程序、配置好交易所对象的前提下，就可以使用FMZ.COM的「调试工具」进行测试了。调用以太坊RPC方法和以太坊交互，除了本章节列举介绍的几个RPC方法，其它RPC方法可以查询资料了解，例如https://www.quicknode.com/docs。

Web3へのアクセスには,様々な言語やツールが利用できます.

FMZでは,RPC方法の呼び出しもパッケージ化されており,これらの機能はFMZのAPI関数にパッケージ化されています.exchange.IO呼び出し方式はexchange.IO("api", "eth", ...)◎第1パラメータは固定伝達"api"固定伝達です."eth"他のパラメータは,特定の呼び出すRPC方法によって決まります.

FMZのプラットフォームを使って,情報を出力します.Logこの関数は,Log機能は複数のパラメータを入力して,FMZプラットフォームの"デュウミュウツール"または"実体ディスク"のログ領域に出力します. "デュウミュウツール"ページは,私たちがテストする主要なツールになります.

eth_get バランス

エーサインeth_getBalanceこの方法では,2つのパラメータを入力し,EthereumのアドレスのETH残高を問い合わせます.

• メールの送信先はこちら.
• 標籤は,一般的に"latest"を使用します.

エーサインの創始者について調べてみましょうV神このサイトでは,ETHウォルテージのアドレスが,0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045。

function main() {
    let ethBalance = exchange.IO("api", "eth", "eth_getBalance", "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "latest")
    Log("ethBalance:", ethBalance)
}

管理者 (図:linux/amd64...) を展開し,取引所オブジェクト (図:Web3 test) を配置し,デュバッグツールでコードをテストしました:

実行ボタンをクリックして,このコードを実行します.

ethバランス: 0x117296558f185bbc4c6

Logこの関数は,ethBalance変数の値は:0x117296558f185bbc4c6, は文字列タイプである.16桁のETH残高ありがとうございました.weiユニット1e18 wei1 に等しいETHそして,この10分の1のETHの残高は,10分の1のETHの10分の1のETHの10分の1のETHに変換されます.

そして,ethBalance読み取れるデータに変換する:

function main() {
    let ethBalance = exchange.IO("api", "eth", "eth_getBalance", "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "latest")
    Log("ethBalance:", ethBalance)
    
    // 将ethBalance转换为可读的数据
    let vitalikEthBalance = parseInt(ethBalance.substring(2), 16) / 1e18
    Log("vitalikEthBalance:", vitalikEthBalance)
}

上からhttps://etherscan.io/問い合わせ:

言語の正確性に関する問題には偏差があるため,FMZプラットフォームは2つの機能を組み込み,データ処理を行います.

• Big:Int は 16 桁の文字列を BigInt オブジェクトに変換します.
• BigDecimal: 数値型オブジェクトを処理可能なBigDecimalオブジェクトに変換する.

再びコードを調整する:

function main() {
    let ethBalance = exchange.IO("api", "eth", "eth_getBalance", "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "latest")

    // ETH的精度单位为1e18
    let ethDecimal = 18
    Log("vitalikEthBalance:", Number((BigDecimal(BigInt(ethBalance)) / BigDecimal(Math.pow(10, ethDecimal))).toString()))
}

ビタリックEth バランス: 5149.6244846875215

eth_chainId

eth_chainIdそしてnet_versionこの2つの関数は,現在のRPCノードがアクセスしたブロックチェーンのIdを返します.net_version代数式Idを返します.eth_chainId16桁の Id を返します.

チェーンIdに対応するネットワーク名

1 - ethereum mainnet
2 - morden testnet (deprecated)
3 - ropsten testnet
4 - rinkeby testnet
5 - goerli testnet
11155111 - sepolia testnet
10 - optimism mainnet
69 - optimism kovan testnet
42 - kovan testnet
137 - matic/polygon mainnet
80001 - matic/polygon mumbai testnet
250 - fantom mainnet
100 - xdai mainnet
56 - bsc mainnet

設定されたイーサリアムテストネットを使用します.goerliポイントテスト:

function main() {
    let netVersionId = exchange.IO("api", "eth", "net_version")
    let ethChainId = exchange.IO("api", "eth", "eth_chainId")

    Log("netVersionId:", netVersionId)
    Log("ethChainId:", ethChainId, " ，转换：", parseInt(ethChainId.substring(2), 16))
}

eth_gas 価格

呼び出しeth_gasPrice方法,現在のチェーンで検索するgas price。

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function main() {
    let gasPrice = exchange.IO("api", "eth", "eth_gasPrice")
    Log("gasPrice:", gasPrice, " ，转换：", toAmount(gasPrice, 0))
}

読み取れる数値に変換する操作を,関数として書きます.toAmountまた,ガス価格の単位は,wei形状を変えたのですdecimals対応する実参数伝達値は0である.

eth_blockNumbe について

eth_blockNumbeブロックの高さを調べるために使用されます.

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function main() {
    let blockNumber = exchange.IO("api", "eth", "eth_blockNumber")
    Log(toAmount(blockNumber, 0))
}

試行錯誤ツールで実行する:

https://etherscan.io/検索結果:

eth_getBlockByNumber ブロック番号

ブロックの情報を検索します.

function main() {
    let blockNumber = exchange.IO("api", "eth", "eth_blockNumber")    
    Log(blockNumber)
    let blockMsg = exchange.IO("api", "eth", "eth_getBlockByNumber", blockNumber, true)
    Log(typeof(blockMsg), blockMsg)
    
    // 由于Log输出的内容过多，会自动截断，所以遍历返回的区块信息各个字段，逐个打印
    for (let key in blockMsg) {
        Log("key:", key, ", val:", blockMsg[key])
    }
}

試行錯誤ツールで実行すると,次の情報を得ることができます:

契約情報を読む

エイサリアムには,多くのスマートコントラクトアプリケーションが動いています.ENSメディアの報道によると,ENSエサリアム・ドメイン・ネーム・サービス (Ethereum Name Service) は,イーサリアム・ブロックチェーンに基づく分散ドメイン・ネーム解析サービスである. ビデオでは,Ethereumの創始者V・ゴッドの財布のバランスの例について調べたのを覚えていますか?0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045じゃあ,どうやってこの住所を知るのか?ENSスマートコントラクト,直感的な名前でvitalik.ethヴィタリック (Vの名前) を問い合わせる.

この章は,Ethereumの環境を使用し,ENS文書は,検索されたイーサリアム・ドメイン名に対して実行する必要があると知られています.Hashing Namesこのコードを使って,vitalik.eth名前は処理されている.

function nameHash(name) {
    if (name == "") {
        return "0000000000000000000000000000000000000000000000000000000000000000"
    } else {
        let arr = name.split(".")
        let label = arr[0]
        
        arr.shift()
        let remainder = arr.join(".")
        return Encode("sha3.keccak256", "hex", "hex", nameHash(remainder) + Encode("sha3.keccak256", "raw", "hex", label))
    }
}

この例では,この関数は,Encodeこの機能は,FMZプラットフォームのAPI機能であり,FMZプラットフォーム上で暗号操作を行うために使用されている.この機能は,複数の暗号化方法をサポートし,複数のハッシュアルゴリズムをサポートする.

Encode(algo, inputFormat, outputFormat, data, keyFormat, key string)

ENSドキュメントに記載されているように使用します.sha3.keccak256アルゴリズムがデータを処理します.

呼び出しnameHash機能は,例えば:Log(nameHash("vitalik.eth"))メディアは,ee6c4522aab0003e8d14cd40a6af439055fd2577951148c14b6cea9a53475835前に "0x" を加える必要があります.0xee6c4522aab0003e8d14cd40a6af439055fd2577951148c14b6cea9a53475835電子機器は,インターネット上でresolver方法のパラメータ.

let ensNode = "0x" + nameHash("vitalik.eth")    // 准备好调用resolver方法的参数ensNode

ENSのドキュメントを検索すると,ENSのスマートコントラクトアプリケーションの契約住所は:0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e◎スマートコントラクトを呼んでいるresolver方法としては,契約を準備する必要があります.ABI。

ABI登録

学生たちがここに来て,何がスマートコントラクトなのかと尋ねる.ABIほら

ABI，即应用程序二进制接口（Application Binary Interface），是智能合约与外部世界进行通信的接口标准。
智能合约的 ABI 定义了合约的函数接口、参数类型、返回值等信息，以及调用合约的方式和参数传递方式等规范。

智能合约的 ABI 通常以 JSON 格式存储，包含以下信息：

合约的函数接口：函数名、参数列表、返回值等信息。
函数参数类型：如 uint256、bool、string 等。
函数的输入参数和输出参数的编码方式：智能合约使用一种称为 Solidity ABI 的编码方式来编码函数的输入参数和输出参数，
以便与以太坊网络进行交互。
在以太坊网络中，使用智能合约的 ABI 来调用合约的函数。当需要调用合约函数时，需要提供函数名和函数参数，以及将函数参数按照 ABI 编码方式编码后的字节码。
以太坊节点会将这些信息打包成一笔交易，并将交易发送到以太坊网络中执行。

智能合约的 ABI 在 Solidity 语言中可以通过 interface 关键字来定义。以太坊开发工具如 Remix IDE、Truffle 等也提供了 ABI 编辑和生成工具，
使得开发者可以方便地创建和使用智能合约的 ABI。

この画像は,resolver方法の一部は,完全なABIを使用することもできます.https://etherscan.io/契約のABIを検索したり,他の方法によってABIを取得したり (例えば:関連プロジェクト文書)

let abiENS_resolver = `[{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"resolver","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}]`

再びFMZのプラットフォームで新しい呼び出し方法を学びましょう.exchange.IO("abi", address, abiContent)この方法を使ってABIを登録します.address参数とは,スマートコントラクトのアドレスです.abiContent参数は対応するスマートコントラクト ABI (文字列) である.

let abiENS_resolver = `[{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"resolver","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}]`
exchange.IO("abi", "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e", abiENS_resolver)  // 0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e 是在以太坊主网上部署的ENS智能合约的地址

スマートコントラクトを呼び出す方法

電子機器のスマートコントラクトは,resolver方法が戻ってきたENS: Public Resolver契約の住所.

let resolverAddress = exchange.IO("api", "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e", "resolver", ensNode)

使用するENS: Public Resolver契約addrVの財布の住所を取得する方法.ENS: Public Resolver契約はABI登録が必要である.このスマートコントラクトのABI情報はhttps://etherscan.io/取得しました.

let abiENSPublicResolver = `[{"inputs":[{"internalType":"contract ENS","name":"_ens","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"uint256","name":"contentType","type":"uint256"}],"name":"ABIChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"address","name":"a","type":"address"}],"name":"AddrChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"coinType","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"newAddress","type":"bytes"}],"name":"AddressChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"bool","name":"isAuthorised","type":"bool"}],"name":"AuthorisationChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"hash","type":"bytes"}],"name":"ContenthashChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"name","type":"bytes"},{"indexed":false,"internalType":"uint16","name":"resource","type":"uint16"},{"indexed":false,"internalType":"bytes","name":"record","type":"bytes"}],"name":"DNSRecordChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"name","type":"bytes"},{"indexed":false,"internalType":"uint16","name":"resource","type":"uint16"}],"name":"DNSRecordDeleted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"DNSZoneCleared","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"bytes4","name":"interfaceID","type":"bytes4"},{"indexed":false,"internalType":"address","name":"implementer","type":"address"}],"name":"InterfaceChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"string","name":"name","type":"string"}],"name":"NameChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes32","name":"x","type":"bytes32"},{"indexed":false,"internalType":"bytes32","name":"y","type":"bytes32"}],"name":"PubkeyChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"string","name":"indexedKey","type":"string"},{"indexed":false,"internalType":"string","name":"key","type":"string"}],"name":"TextChanged","type":"event"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"contentTypes","type":"uint256"}],"name":"ABI","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"addr","outputs":[{"internalType":"address payable","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"coinType","type":"uint256"}],"name":"addr","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"},{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"authorisations","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"clearDNSZone","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"contenthash","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"name","type":"bytes32"},{"internalType":"uint16","name":"resource","type":"uint16"}],"name":"dnsRecord","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"name","type":"bytes32"}],"name":"hasDNSRecords","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes4","name":"interfaceID","type":"bytes4"}],"name":"interfaceImplementer","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"pubkey","outputs":[{"internalType":"bytes32","name":"x","type":"bytes32"},{"internalType":"bytes32","name":"y","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"contentType","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"setABI","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"coinType","type":"uint256"},{"internalType":"bytes","name":"a","type":"bytes"}],"name":"setAddr","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"a","type":"address"}],"name":"setAddr","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"target","type":"address"},{"internalType":"bool","name":"isAuthorised","type":"bool"}],"name":"setAuthorisation","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes","name":"hash","type":"bytes"}],"name":"setContenthash","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"setDNSRecords","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes4","name":"interfaceID","type":"bytes4"},{"internalType":"address","name":"implementer","type":"address"}],"name":"setInterface","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"string","name":"name","type":"string"}],"name":"setName","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"x","type":"bytes32"},{"internalType":"bytes32","name":"y","type":"bytes32"}],"name":"setPubkey","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"string","name":"key","type":"string"},{"internalType":"string","name":"value","type":"string"}],"name":"setText","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes4","name":"interfaceID","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"string","name":"key","type":"string"}],"name":"text","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"}]`
exchange.IO("abi", resolverAddress, abiENSPublicResolver)

最後の呼び出しENS: Public Resolver契約addr方法やパラメータはensNode。

let vitalikAddress = exchange.IO("api", resolverAddress, "addr", ensNode)
Log("vitalikAddress:", vitalikAddress)

ログ関数の出力:

vitalikAddress: 0xd8da6bf26964af9d7eed9e03e53415d37aa96045

ENSを呼び出すための完全なコード

function nameHash(name) {
    if (name == "") {
        return "0000000000000000000000000000000000000000000000000000000000000000"
    } else {
        let arr = name.split(".")
        let label = arr[0]
        
        arr.shift()
        let remainder = arr.join(".")
        return Encode("sha3.keccak256", "hex", "hex", nameHash(remainder) + Encode("sha3.keccak256", "raw", "hex", label))
    }
}

function main() {
    // 计算名称
    let ensNode = "0x" + nameHash("vitalik.eth")

    // 注册ENS合约
    let abiENS_resolver = `[{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"resolver","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}]`
    exchange.IO("abi", "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e", abiENS_resolver)
    let resolverAddress = exchange.IO("api", "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e", "resolver", ensNode)
    
    // 注册ENS Public Resolver合约
    let abiENSPublicResolver = `[{"inputs":[{"internalType":"contract ENS","name":"_ens","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"uint256","name":"contentType","type":"uint256"}],"name":"ABIChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"address","name":"a","type":"address"}],"name":"AddrChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"coinType","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"newAddress","type":"bytes"}],"name":"AddressChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"bool","name":"isAuthorised","type":"bool"}],"name":"AuthorisationChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"hash","type":"bytes"}],"name":"ContenthashChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"name","type":"bytes"},{"indexed":false,"internalType":"uint16","name":"resource","type":"uint16"},{"indexed":false,"internalType":"bytes","name":"record","type":"bytes"}],"name":"DNSRecordChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"name","type":"bytes"},{"indexed":false,"internalType":"uint16","name":"resource","type":"uint16"}],"name":"DNSRecordDeleted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"DNSZoneCleared","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"bytes4","name":"interfaceID","type":"bytes4"},{"indexed":false,"internalType":"address","name":"implementer","type":"address"}],"name":"InterfaceChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"string","name":"name","type":"string"}],"name":"NameChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"bytes32","name":"x","type":"bytes32"},{"indexed":false,"internalType":"bytes32","name":"y","type":"bytes32"}],"name":"PubkeyChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"string","name":"indexedKey","type":"string"},{"indexed":false,"internalType":"string","name":"key","type":"string"}],"name":"TextChanged","type":"event"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"contentTypes","type":"uint256"}],"name":"ABI","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"addr","outputs":[{"internalType":"address payable","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"coinType","type":"uint256"}],"name":"addr","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"},{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"authorisations","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"clearDNSZone","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"contenthash","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"name","type":"bytes32"},{"internalType":"uint16","name":"resource","type":"uint16"}],"name":"dnsRecord","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"name","type":"bytes32"}],"name":"hasDNSRecords","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes4","name":"interfaceID","type":"bytes4"}],"name":"interfaceImplementer","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"pubkey","outputs":[{"internalType":"bytes32","name":"x","type":"bytes32"},{"internalType":"bytes32","name":"y","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"contentType","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"setABI","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint256","name":"coinType","type":"uint256"},{"internalType":"bytes","name":"a","type":"bytes"}],"name":"setAddr","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"a","type":"address"}],"name":"setAddr","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"target","type":"address"},{"internalType":"bool","name":"isAuthorised","type":"bool"}],"name":"setAuthorisation","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes","name":"hash","type":"bytes"}],"name":"setContenthash","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"setDNSRecords","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes4","name":"interfaceID","type":"bytes4"},{"internalType":"address","name":"implementer","type":"address"}],"name":"setInterface","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"string","name":"name","type":"string"}],"name":"setName","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"x","type":"bytes32"},{"internalType":"bytes32","name":"y","type":"bytes32"}],"name":"setPubkey","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"string","name":"key","type":"string"},{"internalType":"string","name":"value","type":"string"}],"name":"setText","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes4","name":"interfaceID","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"string","name":"key","type":"string"}],"name":"text","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"}]`
    exchange.IO("abi", resolverAddress, abiENSPublicResolver)
    let vitalikAddress = exchange.IO("api", resolverAddress, "addr", ensNode)
    Log("vitalikAddress:", vitalikAddress)
}

ETHを送信する

前回のレッスンでは,プライベートキーの配置について学びました. 設定が完了した取引所のオブジェクトに対して,このプライベートキーの対応するウォレットアドレスをどのように知ることができますか?exchange.IO("address")機能は,設定されたプライベートキーに対応するウォレットアドレスを取得します.

この章の下記の内容が使用されているためGoerliウェブ環境をテストするため,私が使っているノードは:https://goerli.infura.io/v3/*******Infuraは,登録ユーザーごとに異なるノードアドレスを割り当てています.*******隠された内容.

function main() {
    let walletAddress = exchange.IO("address")
    Log("测试网 goerli 钱包地址：", walletAddress)
}

ウォレットアドレスを知れば,EthereumのRPC方法を使うことができます.eth_getTransactionCount財布の住所に関する取引のカウント.イーサリアムでは,このカウントがよく使用され,実際に送金操作の際に入力する必要があります.nonce参数,イーサリアムでは,nonceは,各取引がユニークであることを確認するために使用されます. これは,新しい取引を送信するたびに自動的に増加する増加数字です. したがって,スマートコントラクトに取引を送信するときに,取引がユニークで順序が正しいことを確認するために,nonceを提供する必要があります. いくつかの情報や文書で,私たちは次のように問い合わせることができます:

https://goethereumbook.org/en/

ゲー言語のEthereumデータベースですPendingNonceAt呼び出しの仕方です.eth_getTransactionCount方法. 前回のレッスンでは,RPCの方法について学びました.exchange.IO("api", "eth", ...)この関数は,

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function main() {
    let walletAddress = exchange.IO("address")
    Log("测试网 goerli 钱包地址：", walletAddress)

    /**
    * eth_getTransactionCount
    * @param address - string - The address from which the transaction count to be checked.
    * @param blockNumber - string - The block number as a string in hexadecimal format or tags.
    * @returns The integer of the number of transactions sent from an address encoded as hexadecimal.
    */
    let nonce = exchange.IO("api", "eth", "eth_getTransactionCount", walletAddress, "pending")
    Log("钱包地址：", walletAddress, "当前的 nonce：", nonce, "，转换为10进制：", toAmount(nonce, 0))
}

送金操作について説明する前に,Ethereumの送金時に特定のETHトークンが消費される概念について簡単に説明します. このガス料金は2つのパラメータによって決定されます.

• ガス価格

  しかし,イーサリアムネットワーク上のガスの料金は常に市場の需要とユーザーが支払うために用意した料金によって変動するので,コードに固定されたガスの料金を書くことは,時には理想的な選択肢ではありません.eth_gasPrice平均的なガス価格を得る方法.

• ガス制限

  標準的なイーサリングのガス制限は21,000ユニットである.

わかったnonce，gasPrice，gasLimitFMZに包装された非常にシンプルで使いやすい転送機能.

exchange.IO("api", "eth", "send", toAddress, toAmount)

銀行口座は,銀行口座として利用されます.exchange.IO送信の3番目のパラメータは"send"で固定されています.toAddressこのパラメータは,転送時にETHを受信するアドレスを表示します.toAmount移転されたETHの数.

nonce，gasPrice，gasLimitこれらのパラメータは,FMZでシステムデフォルトで自動的に取得する値を使用することもできます.

exchange.IO("api", "eth", "send", toAddress, toAmount, {gasPrice: 5000000000, gasLimit: 21000, nonce: 100})

テストネットのgoerliで,特定のETHを,次のアドレスに転送します.

function toInnerAmount(s, decimals) {
    return (BigDecimal(s)*BigDecimal(Math.pow(10, decimals))).toFixed(0)
}

function main() {
    let walletAddress = exchange.IO("address")
    Log("测试网 goerli 钱包地址：", walletAddress)

    let ret = exchange.IO("api", "eth", "send", "0x4D75a08E870674E68cAE611f329A27f446A66813", toInnerAmount(0.01, 18))
    return ret    // 返回Transaction Hash : 0xa6f9f51b00d8ae850b0f204380b59da98f4bbce34b813577d3d948f61de4734e
}

取引の単位はwei定義関数を使う必要があります.toInnerAmount処理するwei単位の数値である.

ニュースhttps://etherscan.io/トランザクションハッシュの検索:0xa6f9f51b00d8ae850b0f204380b59da98f4bbce34b813577d3d948f61de4734e。

暗号で検索したり,ハッシュ転送したりできます.0xa6f9f51b00d8ae850b0f204380b59da98f4bbce34b813577d3d948f61de4734e活用するeth_getTransactionReceipt問い合わせの方法

function main() {
    let transHash = "0xa6f9f51b00d8ae850b0f204380b59da98f4bbce34b813577d3d948f61de4734e"
    let info = exchange.IO("api", "eth", "eth_getTransactionReceipt", transHash)
    return info
}

検索結果:

{
	"cumulativeGasUsed": "0x200850",
	"effectiveGasPrice": "0x1748774421",
	"transactionHash": "0xa6f9f51b00d8ae850b0f204380b59da98f4bbce34b813577d3d948f61de4734e",
	"type": "0x0",
	"blockHash": "0x6bdde8b0f0453ecd24eecf7c634d65306f05511e0e8f09f9ed3f59eee2d06ac7",
	"contractAddress": null,
	"blockNumber": "0x868a50",
	"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
	"gasUsed": "0x5208",
	"to": "0x4d75a08e870674e68cae611f329a27f446a66813",
	"status": "0x1",
	"transactionIndex": "0x23",
	"from": "0x6b3f11d807809b0b1e5e3243df04a280d9f94bf4",
	"logs": []
}

各項目の説明は以下のとおりです.

blockHash - 该交易所在区块的哈希值
blockNumber - 以十六进制编码的该交易所在区块的块号
contractAddress - 如果是合约创建，该合约的地址；否则为null
cumulativeGasUsed - 该交易在区块中执行时使用的总燃气量
effectiveGasPrice - 每单位燃气的总基础费用加小费
from - 发送者的地址
gasUsed - 该特定交易使用的燃气量
logs - 生成该交易的日志对象数组
  address - 生成该日志的地址
  topics - 0到4个32字节索引日志参数的数据数组。在Solidity中，第一个主题是事件签名的哈希值（例如Deposit（address，bytes32，uint256）），除非你使用匿名说明符声明该事件
  data - 日志的32字节非索引参数
  blockNumber - 该日志所在区块的块号
  transactionHash - 该日志创建时的交易哈希值。如果该日志处于待定状态，则为null
  transactionIndex - 该日志创建时的交易索引位置。如果该日志处于待定状态，则为null
  blockHash - 该日志所在区块的哈希值
  logIndex - 该日志在区块中的索引位置，以十六进制编码的整数。如果该日志处于待定状态，则为null
  removed - 如果该日志已被删除，则为true，由于链重组而被删除；如果是有效的日志，则为false
logsBloom - 用于检索相关日志的布隆过滤器
status - 以十六进制编码的值，它要么是1（成功），要么是0（失败）
to - 接收者的地址。如果是合约创建交易，则为null
transactionHash - 该交易的哈希值
transactionIndex - 以十六进制编码的该交易在区块中的索引位置
type - 值的类型

エーサイン・スマート・コントラクト

私たちは契約情報を読むこの章では,Ethereumに展開されているENS契約を呼び出す方法がVの財布アドレスを取得する完全な例を提示します.これらの方法は,Read呼び出す必要がないのです.gasこの章では,Ethereumのスマートコントラクトについて説明します.Write方法と支払いgasこの操作は,ネットワーク全体の各ノードとマイナーによって検証され,ブロックチェーンの状態が変化します.

ERC20

ERC20契約 (ERC20トークン契約) の場合,FMZプラットフォームは,ERC20契約のABIを通常使用されるABIとしてシステムに直接組み込み,登録ABIのステップを省略します.

ABI をよりよく理解するには,ERC20 契約の ABI を使用する前に確認してください.

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"deposit","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"guy","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Withdrawal","type":"event"}]

本章は,以下の内容を使用します.Goerliウェブ環境のテスト.

バランス

契約を呼び出す方法を練習します.ReadERC20の契約を呼び出す方法balanceOf暗号通貨のバランスを調べる方法balanceOfメソッドにはパラメータが1つだけあるが,命名されていないので,型によって見られるのはアドレスである. 返されたデータは1つのトークンで単位化されていないため,トークンの精度データも必要であり,トークンの精度がERC20契約で計算できる.decimals取得方法.私たちはイーサリアムテストネットを使用しています.goerliテストを行うと,異なるチェーンでトークン契約の住所も異なる可能性があることに注意してください.

function toAmount(s, decimals) {
    return Number((BigDecimal(BigInt(s)) / BigDecimal(Math.pow(10, decimals))).toString())
}

function main() {
    let walletAddress = exchange.IO("address")
    
    // goerli WETH address 
    let wethAddress = "0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6"
    // goerli LINK address 
    let linkAddress = "0x326C977E6efc84E512bB9C30f76E30c160eD06FB"

    // 由于是ERC20合约，FMZ已经内置ABI注册，所以这里不用注册ERC20 ABI
    let wethDecimals = exchange.IO("api", wethAddress, "decimals")
    let linkDecimals = exchange.IO("api", linkAddress, "decimals")

    let wethBalance = exchange.IO("api", wethAddress, "balanceOf", walletAddress)
    let linkBalance = exchange.IO("api", linkAddres