Les ressources ont été chargées... Je charge...

Introduction facile au développement web3 basé sur Ethereum avec FMZ

Auteur:L'inventeur de la quantification - un petit rêve, Créé: 2023-03-28 13:32:48, Mis à jour: 2024-11-11 22:28:24

"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:drawal},{anonymous:false,inputs:[indexed:true,name:src,type:adress:evaluated,indexed,type:drawal,drawal,drawal,type:drawal,drawal,type:Withinputs:

// WETH合约地址
var wethAddress = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"

// 注册WETH合约的ABI
exchange.IO("abi", wethAddress, abiWETH)

// 当前配置的交易所对象的钱包地址
var walletAddress = exchange.IO("address")

// 编码WETH合约的deposit方法调用
var calldataForDeposit = exchange.IO("encode", wethAddress, "deposit")
Log("calldataForDeposit:", "0x" + calldataForDeposit)

// 获取nonce
var nonce = exchange.IO("api", "eth", "eth_getTransactionCount", walletAddress, "pending")

// 获取gasPrice
var gasPrice = exchange.IO("api", "eth", "eth_gasPrice")

// 调用deposit方法把ETH换为WETH，需要转账ETH，这里把0.01ETH转换为以wei为单位的十六进制数值
var innerAmount = BigInt(Number(toInnerAmount(0.005, 18))).toString(16)

// The transaction call object:
var obj = {
    "from" : walletAddress,
    "to"  : wethAddress,
    "gasPrice" : gasPrice,
    "value" : "0x" + innerAmount,
    "data" : "0x" + calldataForDeposit,
}

// 计算gasLimit
var gasLimit = exchange.IO("api", "eth", "eth_estimateGas", obj)

// 构造交易
var transaction = {
    "to": wethAddress,
    "value": toAmount("0x" + innerAmount, 0),   // 转换为10进制
    "data": "0x" + calldataForDeposit,
    "gasLimit": toAmount(gasLimit, 0),   // 转换为10进制
    "gasPrice": toAmount(gasPrice, 0),   // 转换为10进制
    "nonce": toAmount(nonce, 0),         // 转换为10进制
    "chainId": 1,                        // 以太坊主网Id
}
Log("transaction:", transaction)

// 签名，your key 替换为你的私钥
var signedTx = Encode("signTx", "string", "hex", JSON.stringify(transaction), "hex", "0x" + "your key")
Log("signedTx:", "0x" + signedTx)

// 调用eth_sendRawTransaction发送交易
var ret = exchange.IO("api", "eth", "eth_sendRawTransaction", "0x" + signedTx)
return ret

}


调试工具中运行：

```run
2023-06-15 09:58:50		信息	signedTx: 0xf86f4f8504202067888...
2023-06-15 09:58:50		信息	transaction: {"to":"0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2","value":5000000000000000,"data":"0xd0e30db0","gasLimit":27938,"gasPrice":17718863752,"nonce":79,"chainId":1}
2023-06-15 09:58:50		信息	calldataForDeposit: 0xd0e30db0

exécutévar ret = exchange.IO("api", "eth", "eth_sendRawTransaction", "0x" + signedTx)La fonction qui renvoie le Hash de transaction est:0x2ff585504b0fe59b0122f696e8808abfe2f3ce263448066533f3bb8a4f55e8e6Je ne sais pas.eth_sendRawTransactionL'appel a exécuté les données de l'appel et a appelé le contrat WETH.depositLa méthode consiste à convertir les 0.005 ETH envoyés en WETH.

On écoute Mempool

Avant que les transactions des utilisateurs sur Ethereum ne soient intégrées par les mineurs dans la blockchain Ethereum, toutes les transactions étaient regroupées dans un seul bloc.MempoolDans les pools de mémoire de transaction, les puces de mineurs de lithium cherchent également à prioriser les transactions coûteuses afin de maximiser les bénéfices miniers.

Certains scripts de transaction sont aussi corrects.MempoolUne transaction, par exemple, peut être attaquée par des scripts de sandwiches de cuisson si un point de glissement de conversion est trop élevé.MempoolDanspendingQuel est l'échange?

Écoute par protocole REST

Nous avons appris à utiliser les méthodes de RPC précédemment:eth_getBlockByNumberNous ne sommes pas en train d'en parler en détail.blockNumberNous utilisons"pending"Je ne suis pas d'accord avec toi.

function main() {
    var data = exchange.IO("api", "eth", "eth_getBlockByNumber", "pending", true)
    if (Array.isArray(data.transactions)) {
        for (var i = 0; i < data.transactions.length; i++) {
            Log(data.transactions[i])
        }
    }
}

Les outils de débogage fonctionnent:

2023-06-18 19:23:05		信息	{"blockNumber":"0x10b2027","type":"0x2","accessList":[],"blockHash":"0xf833ed36435c53d63bd7109bb1e85383075534410c14573881bf26d912f46a89","from":"0xd50521974d62f1fa34b8e81cb742ccf6147d05ff","gasPrice":"0x32ea2db37","hash":"0xf8f10f8f473c340b021298feb48d0affe529e8737a309c4cc1902e8989ef0914","input":"0xa22cb4650000000000000000000000001e0049783f008a0085193e00003d00cd54003c710000000000000000000000000000000000000000000000000000000000000001","v":"0x0","value":"0x0","maxFeePerGas":"0x48a413364","maxPriorityFeePerGas":"0x5f5e100","nonce":"0x8","r":"0x8c1cc36f43b02c9e9e454153588cc9d38757f1da69ec49d3cfdda74ab69e06a8","s":"0x2f3dd3e5ddf9e5d42c128a8e900026aca7568fa83c68cf332e1328066ee8d03a","transactionIndex":"0x3a","chainId":"0x1","gas":"0x1142d","to":"0x8c3c0274c33f263f0a55d129cfc8eaa3667a9e8b"}
2023-06-18 19:23:05		信息	{"input":"0x646174613a2c7b2270223a226572632d3230222c226f70223a226d696e74222c227469636b223a2265746873222c226964223a223139323732222c22616d74223a2231303030227d","nonce":"0x1d","blockHash":"0xf833ed36435c53d63bd7109bb1e85383075534410c14573881bf26d912f46a89","from":"0xe7fa86855af674837cea1b58f88b5352543ca27b","gas":"0x81cc","gasPrice":"0x32ea2db37","to":"0xe7fa86855af674837cea1b58f88b5352543ca27b","chainId":"0x1","transactionIndex":"0x39","type":"0x2","value":"0x0","accessList":[],"blockNumber":"0x10b2027","hash":"0x55702f5d14736fc9d0c58fdac2d2052a602db171c46b5e1fa9ff6af5c277f9a2","maxFeePerGas":"0x48a413364","maxPriorityFeePerGas":"0x5f5e100","r":"0x5a703d389d23b51adf8ef0f55db8876e7392636797b68a4be6afe73e76d7e1f2","s":"0x4b4bb11257c4434a0acc2672357f8793476e4bfdf98bc30d2389ce335e7de64e","v":"0x1"}
2023-06-18 19:23:05		信息	{"gas":"0x186a0","nonce":"0x46533","r":"0xfeea052a4ac2283ca058a657a806ba0916d8e7d52d2a577f150c40eb1dfbec65","s":"0x5bf0089a3c060ba787b67a205b44e1065a0d11d132b41737ab9adf0f55066811","transactionIndex":"0x38","value":"0x78f0975742c400","blockHash":"0xf833ed36435c53d63bd7109bb1e85383075534410c14573881bf26d912f46a89","chainId":"0x1","hash":"0x56bdf1b38e23db66e8d1c4014d1e9f690a9217d8a0232489210325fc69e25cf9","v":"0x25","input":"0x","type":"0x0","blockNumber":"0x10b2027","gasPrice":"0x4a817c800","from":"0x97b9d2102a9a65a26e1ee82d59e42d1b73b68689","to":"0xcb513e99c020e9d15a6eafef873fef5d9f078221"}
...

Le nombre d'enfants atteints par la maladie est en hausse.

{
	"blockNumber": "0x10b2027",
	"type": "0x2",
	"accessList": [],
	"blockHash": "0xf833ed36435c53d63bd7109bb1e85383075534410c14573881bf26d912f46a89",
	"from": "0xd50521974d62f1fa34b8e81cb742ccf6147d05ff",
	"gasPrice": "0x32ea2db37",
	"hash": "0xf8f10f8f473c340b021298feb48d0affe529e8737a309c4cc1902e8989ef0914",
	"input": "0xa22cb4650000000000000000000000001e0049783f008a0085193e00003d00cd54003c710000000000000000000000000000000000000000000000000000000000000001",
	"v": "0x0",
	"value": "0x0",
	"maxFeePerGas": "0x48a413364",
	"maxPriorityFeePerGas": "0x5f5e100",
	"nonce": "0x8",
	"r": "0x8c1cc36f43b02c9e9e454153588cc9d38757f1da69ec49d3cfdda74ab69e06a8",
	"s": "0x2f3dd3e5ddf9e5d42c128a8e900026aca7568fa83c68cf332e1328066ee8d03a",
	"transactionIndex": "0x3a",
	"chainId": "0x1",
	"gas": "0x1142d",
	"to": "0x8c3c0274c33f263f0a55d129cfc8eaa3667a9e8b"
}

Écoute à l'aide du protocole WebSocket

Nous utilisons une plateforme de trading quantifié par les inventeurs.DialLes fonctions à créerWebSocketLe lien est visible.FMZ APILes documents sont connusDialLes fonctions.

Le code de test de ce chapitre fonctionne dans un environnement basé sur l'Ethereum, ce qui rend les tests quantifiés sur le disque dur des inventeurs plus pratiques car ils utilisent le protocole WebSocket pour communiquer.

{"jsonrpc": "2.0", "id": 1, "method": "eth_subscribe", "params": ["newPendingTransactions"]}

À partnewPendingTransactionsVous pouvez également vous abonner.newHeads、logs。

ReçuWebSocketLes données sont envoyées par connexion:

{
	"jsonrpc": "2.0",
	"method": "eth_subscription",
	"params": {
		"subscription": "0x2c5c087b4aa188e008f4747828ef4e61",
		"result": "0x69c4251cecb814e17cfe7a5ee41742a616f9a4d1bbf245c49b186b1006fd14d3"
	}
}

Il y a aussi une autre version:"result": "0x69c4251cecb814e17cfe7a5ee41742a616f9a4d1bbf245c49b186b1006fd14d3"Pour plus d'informations:transaction‒ Pour un sujet spécifiquetransactionNous utilisons la méthode RPC d'Ethereum.eth_getTransactionByHashNous sommes ici pour vous renseigner.

var ws = null 

function main () {    
    // {"jsonrpc": "2.0", "id": 1, "method": "eth_subscribe", "params": ["xxxxx"]}  , "xxxxx" 是订阅的具体消息
    var payload = {"jsonrpc": "2.0", "id": 1, "method": "eth_subscribe", "params": ["newPendingTransactions"]}
    
    // wss://mainnet.infura.io/ws/v3/xxxxx , "xxxxx" 是你的infura key
    var infuraKey = "your key"

    ws = Dial("wss://mainnet.infura.io/ws/v3/" + infuraKey + "|reconnect=true&payload=" + JSON.stringify(payload))
    if (!ws) {
        throw "websocket链接infura失败！"
    }
    
    // eth_getTransactionByHash 调用计数
    var getTransactionCounter = 0

    var beginTS = new Date().getTime()

    // 循环获取消息
    while (true) {
        // 接收推送的消息
        var data = ws.read()
        if (data) {
            var ts = new Date().getTime()

            if (ts - beginTS >= 1000) {
                getTransactionCounter = 0
                beginTS = ts 
            }

            // 根据txHash查询交易详情
            if (ts - beginTS < 1000 && getTransactionCounter >= 100) {
                Sleep(1000)
                getTransactionCounter = 0
                beginTS = ts 
            }
            
            var obj = JSON.parse(data)
            if (obj["params"] && obj["params"]["result"]) {
                var transcationInfo = exchange.IO("api", "eth", "eth_getTransactionByHash", obj["params"]["result"])
                Log(obj["params"]["result"], "transcationInfo:", transcationInfo)
            }
            
            getTransactionCounter++
        }

        LogStatus(_D())
    }
}

function onexit() {
    Log("断开WS连接")
    ws.close()
}

Créer le disque dur pour exécuter le code ci-dessus, qui peut recevoir les données de la connexion de WebSocket push, les données sont en continu push, et nous avons extrait untransaction：

{
	"maxPriorityFeePerGas": "0x5f5e100",
	"nonce": "0x1a9",
	"accessList": [],
	"blockNumber": "0x10b1c9f",
	"from": "0x5888700be02f52c8adf85890886ef84a6b8a7829",
	"blockHash": "0x92c3d77ea218cdc0967ab74b6005bb393b92355047f206c7e2d59d41828e7fa9",
	"chainId": "0x1",
	"gasPrice": "0x34fdbf43d",
	"s": "0x7d86ae29a786a61b9e74a7a9e2cc4b39b7913aa3d4c3816ccb07528fed82048a",
	"to": "0xfc2068c3d47b575a60f6a4a7bf60dea0ac368e01",
	"type": "0x2",
	"v": "0x1",
	"value": "0x0",
	"gas": "0x1aad3",
	"hash": "0x2c77c0704aefbb26db460cbb71efdb488df968ad53d2c2b3f1e1172056b40b22",
	"input": "0x42842e0e0000000000000000000000005888700be02f52c8adf85890886ef84a6b8a7829000000000000000000000000d2d07e4d1bb0f40ac3e4aa7cc3ad05d348bfd2c3000000000000000000000000000000000000000000000000000000000000180b",
	"maxFeePerGas": "0x4712d1273",
	"r": "0x8ec58f95f6d9729a6eee075e6976658b6c5346cbc90eb68ac361a40af073b10e",
	"transactionIndex": "0xc1"
}

Les données de journaux sélectionnées (partie omise):

2023-06-18 16:20:07		信息	断开WS连接
2023-06-18 16:20:07		信息	0xba07ca903f9eafbfa7d494bb26197713034b9ca2dd3c19bc0898af3f35b59343 transcationInfo: {"accessList":[],"from":"0xe2977d60182da068dfd78693f96362ee7a2e9644","nonce":"0xf","value":"0x0","blockHash":"0x92c3d77ea218cdc0967ab74b6005bb393b92355047f206c7e2d59d41828e7fa9","blockNumber":"0x10b1c9f","chainId":"0x1","hash":"0xba07ca903f9eafbfa7d494bb26197713034b9ca2dd3c19bc0898af3f35b59343","maxFeePerGas":"0x530c30b70","r":"0xf28bfdf372a5401a2e00675c6ebe8d5e73f2c955db44b1aa56240b9197d6cbc7","type":"0x2","v":"0x0","gas":"0x21079","gasPrice":"0x367b3783d","input":"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","maxPriorityFeePerGas":"0x1dcd6500","s":"0x71d51246bb60e792f963a3c75c46fd8f557921ce6face7224c944e1768a76ca","to":"0x0b51eb9d0e54c562fedc07ceba453f05b70c4b79","transactionIndex":"0x40"}
2023-06-18 16:20:07		信息	0x2c77c0704aefbb26db460cbb71efdb488df968ad53d2c2b3f1e1172056b40b22 transcationInfo: {"maxPriorityFeePerGas":"0x5f5e100","nonce":"0x1a9","accessList":[],"blockNumber":"0x10b1c9f","from":"0x5888700be02f52c8adf85890886ef84a6b8a7829","blockHash":"0x92c3d77ea218cdc0967ab74b6005bb393b92355047f206c7e2d59d41828e7fa9","chainId":"0x1","gasPrice":"0x34fdbf43d","s":"0x7d86ae29a786a61b9e74a7a9e2cc4b39b7913aa3d4c3816ccb07528fed82048a","to":"0xfc2068c3d47b575a60f6a4a7bf60dea0ac368e01","type":"0x2","v":"0x1","value":"0x0","gas":"0x1aad3","hash":"0x2c77c0704aefbb26db460cbb71efdb488df968ad53d2c2b3f1e1172056b40b22","input":"0x42842e0e0000000000000000000000005888700be02f52c8adf85890886ef84a6b8a7829000000000000000000000000d2d07e4d1bb0f40ac3e4aa7cc3ad05d348bfd2c3000000000000000000000000000000000000000000000000000000000000180b","maxFeePerGas":"0x4712d1273","r":"0x8ec58f95f6d9729a6eee075e6976658b6c5346cbc90eb68ac361a40af073b10e","transactionIndex":"0xc1"}
2023-06-18 16:20:07		信息	0xbc42d5db10e5cb2e888c76005c522cb2474a0c0a7325feb867b618f69ff26f2a transcationInfo: {"accessList":[],"blockNumber":"0x10b1c9f","gas":"0x1cc12b","hash":"0xbc42d5db10e5cb2e888c76005c522cb2474a0c0a7325feb867b618f69ff26f2a","maxFeePerGas":"0x6ab262e5c","value":"0x0","v":"0x1","chainId":"0x1","from":"0xc1b634853cb333d3ad8663715b08f41a3aec47cc","input":"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
2023-06-18 16:20:06		信息	0xff0945c3d682a37e18ee433d56c8bedbb93d9ac368af968ed8d53b655575e8e5 transcationInfo: {"gas":"0x5208","s":"0x63572e1fa060841b939cea0849154e55781fe0efcbdfe5ce6979b44ce0980e4a","transactionIndex":"0xa7","value":"0x113e9d515e400","blockHash":"0x92c3d77ea218cdc0967ab74b6005bb393b92355047f206c7e2d59d41828e7fa9","hash":"0xff0945c3d682a37e18ee433d56c8bedbb93d9ac368af968ed8d53b655575e8e5","nonce":"0x2","r":"0x698fe26331ad39ba89c4d30985b707792ea4ab09b25205727f8fac2a6120b54a","gasPrice":"0x35458af00","from":"0x228d93af92d03184c07aa9e39b3d2d61b666686d","input":"0x","to":"0x0246177b98a5e42835cdcfaac1c274d3e6c39486","v":"0x26","blockNumber":"0x10b1c9f","type":"0x0","chainId":"0x1"}
...

Déchiffrer les détails de la transaction

Dans le cours précédent, nous avons écrit un programme de surveillance pour surveiller les transactions en suspens sur Ethereum, en obtenant le hash des transactions poussées via le protocole WebSocket, puis en consultant les détails des transactions en fonction du hash des transactions.

La prochaine chose que nous allons faire, c'est d'examiner les détails des transactions.inputLes données des champs sont analysées plus en détail.inputLes données de champs semblent être des données décimales désordonnées qui encodent en fait le contenu de la transaction: les fonctions à appeler, les paramètres à saisir, etc.

Après plusieurs tests, il a été constaté que le temps de livraison des connexions WebSocket était lié à la quantité de nœuds RPC actuellement utilisés. Deux services de nœuds RPC différents (par exemple, infura et ALCHEMY) créent des connexions WebSocket en même temps, et les données de livraison reçues ne sont pas exactement les mêmes.eth_getTransactionByHash去查询时往往得到一个空值（在FMZ上测试、node.js测试）。

Nous avons utiliséalchemyLe site RPC est le suivant:wss://eth-mainnet.g.alchemy.com/v2/oKmOQKbneVkxgHZfibs-iFhIlIAl6HDNLe protocole WebSocket est également pris en charge par le protocole REST.

Nous surveillons la route des contrats intelligents vers les échanges décentralisés Uniswap.multicall(uint256,bytes[])Nous avons donc besoin de calculer la signature de fonction de cette méthode.

// 取完整哈希值的前8个字符
// multicall: 0x5ae401dc
var sigHash = "0x" + Encode("keccak256", "string", "hex", "multicall(uint256,bytes[])").slice(0, 8)

Nous avons fait quelques modifications basées sur l'exemple du cours précédent.var data = ws.read(-2)Les médias sociaux sont très sensibles à la situation.read()Les paramètres de la fonction sont réglés à -2, ce qui signifie qu'elle renvoie immédiatement les données les plus récentes. Nous ne nous soucions que de contenirmulticallAppeléeTransaction, utilisationif (tx && tx.input.indexOf(sigHash) !== -1)Il a écrit sur Twitter:

Il faut concevoir deux fonctions personnalisées:

calcAllFuncSigHash()Le code d'erreur est le même pour toutes les méthodes de calcul basées sur ABI.
decodeCall(): déchiffrer des fonctions.

Il y a des gens qui ont été tués.multicallAu moment de l'appel, vous pouvez commencer à décoder, décoder pour la première fois.multicallParamètres de la méthode:deadlineetdata。deadlineIl y a un temps de réflexion qui est plus compréhensible.dataIl s'agit d'une autre source de données cryptées, donc il faut continuer à l'utiliser.decodeCall()Décoder une fonction.

L'exemple de mise en œuvre complète:

var ws = null 
var arrLog = []

const ABI_Route = '[{"inputs":[{"internalType":"address","name":"_factoryV2","type":"address"},{"internalType":"address","name":"factoryV3","type":"address"},{"internalType":"address","name":"_positionManager","type":"address"},{"internalType":"address","name":"_WETH9","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH9","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"approveMax","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"approveMaxMinusOne","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"approveZeroThenMax","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"approveZeroThenMaxMinusOne","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes","name":"data","type":"bytes"}],"name":"callPositionManager","outputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"paths","type":"bytes[]"},{"internalType":"uint128[]","name":"amounts","type":"uint128[]"},{"internalType":"uint24","name":"maximumTickDivergence","type":"uint24"},{"internalType":"uint32","name":"secondsAgo","type":"uint32"}],"name":"checkOracleSlippage","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"uint24","name":"maximumTickDivergence","type":"uint24"},{"internalType":"uint32","name":"secondsAgo","type":"uint32"}],"name":"checkOracleSlippage","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMinimum","type":"uint256"}],"internalType":"struct IV3SwapRouter.ExactInputParams","name":"params","type":"tuple"}],"name":"exactInput","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint24","name":"fee","type":"uint24"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMinimum","type":"uint256"},{"internalType":"uint160","name":"sqrtPriceLimitX96","type":"uint160"}],"internalType":"struct IV3SwapRouter.ExactInputSingleParams","name":"params","type":"tuple"}],"name":"exactInputSingle","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMaximum","type":"uint256"}],"internalType":"struct IV3SwapRouter.ExactOutputParams","name":"params","type":"tuple"}],"name":"exactOutput","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint24","name":"fee","type":"uint24"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMaximum","type":"uint256"},{"internalType":"uint160","name":"sqrtPriceLimitX96","type":"uint160"}],"internalType":"struct IV3SwapRouter.ExactOutputSingleParams","name":"params","type":"tuple"}],"name":"exactOutputSingle","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factoryV2","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"getApprovalType","outputs":[{"internalType":"enum IApproveAndCall.ApprovalType","name":"","type":"uint8"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"token0","type":"address"},{"internalType":"address","name":"token1","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"amount0Min","type":"uint256"},{"internalType":"uint256","name":"amount1Min","type":"uint256"}],"internalType":"struct IApproveAndCall.IncreaseLiquidityParams","name":"params","type":"tuple"}],"name":"increaseLiquidity","outputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"token0","type":"address"},{"internalType":"address","name":"token1","type":"address"},{"internalType":"uint24","name":"fee","type":"uint24"},{"internalType":"int24","name":"tickLower","type":"int24"},{"internalType":"int24","name":"tickUpper","type":"int24"},{"internalType":"uint256","name":"amount0Min","type":"uint256"},{"internalType":"uint256","name":"amount1Min","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"internalType":"struct IApproveAndCall.MintParams","name":"params","type":"tuple"}],"name":"mint","outputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"previousBlockhash","type":"bytes32"},{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"positionManager","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"pull","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"refundETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermitAllowed","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermitAllowedIfNecessary","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermitIfNecessary","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"}],"name":"swapExactTokensForTokens","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"}],"name":"swapTokensForExactTokens","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"sweepToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountMinimum","type":"uint256"}],"name":"sweepToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"uint256","name":"feeBips","type":"uint256"},{"internalType":"address","name":"feeRecipient","type":"address"}],"name":"sweepTokenWithFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"feeBips","type":"uint256"},{"internalType":"address","name":"feeRecipient","type":"address"}],"name":"sweepTokenWithFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"int256","name":"amount0Delta","type":"int256"},{"internalType":"int256","name":"amount1Delta","type":"int256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"uniswapV3SwapCallback","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"unwrapWETH9","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountMinimum","type":"uint256"}],"name":"unwrapWETH9","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"feeBips","type":"uint256"},{"internalType":"address","name":"feeRecipient","type":"address"}],"name":"unwrapWETH9WithFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"uint256","name":"feeBips","type":"uint256"},{"internalType":"address","name":"feeRecipient","type":"address"}],"name":"unwrapWETH9WithFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"name":"wrapETH","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]'

function calcAllFuncSigHash(jsonABI) {
    var mapSigHash = {}
    for (var i in jsonABI) {
        var ele = jsonABI[i]
        if (typeof(ele["name"]) != "undefined") {
            if (ele["inputs"]) {
                var funcName = ele["name"]
                if (ele["inputs"].length == 0) {
                    var methodId = "0x" + Encode("keccak256", "string", "hex", funcName + "()").slice(0, 8)
                    mapSigHash[methodId] = {"argsTypeList": [], "argsNameList": [], "funcName": funcName}
                } else {
                    var arr = []
                    var arrName = []
                    var argPrototype = []
                    for (var j in ele["inputs"]) {
                        var inputType = ele["inputs"][j]["type"]
                        if (inputType == "tuple") {                            
                            var components = ele["inputs"][j]["components"]
                            var tupleType = []
                            var protoType = []
                            for (var componentsIdx = 0; componentsIdx < components.length; componentsIdx++) {
                                tupleType.push(components[componentsIdx]["type"])
                                protoType.push(components[componentsIdx]["name"] + " " + components[componentsIdx]["type"])
                            }
                            arr.push("(" + tupleType.join() + ")")
                            arrName.push(ele["inputs"][j]["name"])
                            // 原型
                            argPrototype.push("tuple" + "(" + protoType.join() + ")")
                        } else {
                            arr.push(inputType)
                            arrName.push(ele["inputs"][j]["name"])
                            // 原型
                            argPrototype.push(inputType)
                        }                        
                    }
                    var functionSignature = funcName + "(" + arr.join() + ")"
                    var methodId = "0x" + Encode("keccak256", "string", "hex", functionSignature).slice(0, 8)
                    mapSigHash[methodId] = {"argsTypeList": arr, "argsNameList": arrName, "funcName": funcName, "argPrototype": argPrototype}
                }
            }
        }
    }
    return mapSigHash
}

function decodeCall(input, abi) {
    var mapSigHash = calcAllFuncSigHash(JSON.parse(abi))
    var methodId = input.slice(0, 10)
    var data = input.slice(10)
    
    var decodedArgs = {}
    var infoMethod = mapSigHash[methodId]
    if (typeof(infoMethod) == "undefined") {
        return [methodId, mapSigHash]
    }
    
    var arr = []
    for (var i = 0; i < infoMethod["argsTypeList"].length; i++) {
        if (infoMethod["argsTypeList"][i].startsWith("(")) {
            arr.push(infoMethod["argPrototype"][i])
        } else {
            arr.push(infoMethod["argsTypeList"][i])
        }
    }
    
    if (arr.length == 0) {
        return {"funcName": infoMethod["funcName"], "args": decodedArgs}
    }

    var args = exchange.IO("decode", arr.join(), data)

    if (!Array.isArray(args)) {
        args = [args]
    }

    if (args.length != infoMethod["argsNameList"].length) {
        Log("args:", args)
        Log("infoMethod:", infoMethod)
        throw "解码后的args与argsNameList不等"
    }

    for (var i = 0; i < infoMethod["argsNameList"].length; i++) {
        var key = infoMethod["argsNameList"][i]
        var value = args[i]
        decodedArgs[key] = value
    }

    return {"funcName": infoMethod["funcName"], "args": decodedArgs}
}

function main () {
    // {"jsonrpc": "2.0", "id": 1, "method": "eth_subscribe", "params": ["xxxxx"]}  , "xxxxx" 是订阅的具体消息
    var payload = {"jsonrpc": "2.0", "id": 1, "method": "eth_subscribe", "params": ["newPendingTransactions"]}
    
    // 使用alchemy服务
    ws = Dial("wss://eth-mainnet.g.alchemy.com/v2/oKmOQKbneVkxgHZfibs-iFhIlIAl6HDN" + "|reconnect=true&payload=" + JSON.stringify(payload))
    if (!ws) {
        throw "websocket链接alchemy失败！"
    }
    
    // eth_getTransactionByHash 调用计数
    var getTransactionCounter = 0
    
    // 起始时间戳
    var beginTS = new Date().getTime()
    
    // 计算函数签名哈希
    var sigHash = "0x" + Encode("keccak256", "string", "hex", "multicall(uint256,bytes[])").slice(0, 8)
    Log("sigHash:", sigHash)

    // 循环获取消息
    while (true) {
        var msg = ""
        var recv = null
        // 接收推送的消息，使用read参数-2，立即返回最新数据
        var data = ws.read(-2)
        if (data && data != "") {
            var ts = new Date().getTime()

            if (ts - beginTS >= 1000) {
                getTransactionCounter = 0
                beginTS = ts 
            }

            // 根据txHash查询交易详情
            if (ts - beginTS < 1000 && getTransactionCounter >= 100) {
                Sleep(1000)
                getTransactionCounter = 0
                beginTS = ts 
            }
            
            var obj = JSON.parse(data)
            if (obj["params"] && obj["params"]["result"]) {
                var txHash = obj["params"]["result"]
                var tx = exchange.IO("api", "eth", "eth_getTransactionByHash", txHash)
                
                if (tx && tx.input.indexOf(sigHash) !== -1) {
                    // 解码交易详情
                    arrLog = []
                    var decodedInput = decodeCall(tx.input, ABI_Route)

                    // Log("----------------", txHash, "/", decodedInput["funcName"], "----------------", "#FF0000")
                    arrLog.push("----------------" + txHash + "/" + decodedInput["funcName"] + "----------------" + "#FF0000")
                    arrLog.push(tx.from + " -> " + tx.to)

                    for (var i = 0; i < decodedInput["args"]["data"].length; i++) {
                        var calldata = "0x" + decodedInput["args"]["data"][i]
                        var decodedCalldata = decodeCall(calldata, ABI_Route)

                        // Log("----------------", decodedCalldata["funcName"], "----------------", "#FF0000")
                        arrLog.push("----------------" + decodedCalldata["funcName"] + "----------------" + "#FF0000")

                        for (var key in decodedCalldata["args"]) {
                            // Log(key, decodedCalldata["args"][key])
                            arrLog.push(key + ": " + JSON.stringify(decodedCalldata["args"][key]))
                        }
                    }

                    // 输出日志
                    for (var logIdx = arrLog.length - 1; logIdx >= 0; logIdx--) {
                        Log(arrLog[logIdx])
                    }
                }
                
                getTransactionCounter++
            }
            recv = obj
        } else if (data == null) {
            msg = "缓冲区队列空了,时间：" + _D()
        }
        
        LogStatus(_D(), ", msg:", msg, ", recv:", recv)
    }
}

function onexit() {
    Log("断开WS连接")
    ws.close()
}

function onerror() {
    Log("断开WS连接")
    ws.close()

    for (var logIdx = arrLog.length - 1; logIdx >= 0; logIdx--) {        
        Log(arrLog[logIdx])
    }
}

Créer des tests en direct:

2023-06-20 17:01:00		信息	----------------0x5288a7bd6e0f57162ca763df722de73793e542734d7d2b7af5755664e2e67910/multicall----------------
2023-06-20 17:01:00		信息	0x851b594033d57c98af753bcb3a7d0237a615de32 -> 0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45
2023-06-20 17:01:00		信息	----------------exactInputSingle----------------
2023-06-20 17:01:00		信息	params: {"tokenOut":"0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2","fee":"10000","recipient":"0x0000000000000000000000000000000000000002","amountIn":"8952087000296027130940868","amountOutMinimum":"41638694112306829","sqrtPriceLimitX96":"0","tokenIn":"0xe1283567345349942acdfad3692924a1b16cf3cc"}
2023-06-20 17:01:00		信息	----------------unwrapWETH9----------------
2023-06-20 17:01:00		信息	amountMinimum: "41638694112306829"
2023-06-20 17:01:00		信息	recipient: "0x851b594033d57c98af753bcb3a7d0237a615de32"
2023-06-20 16:59:03		信息	----------------0x55e0c4a38a17d3aa6e8f558a66c77e9defa9f8f6e347536363ac1b921de9aaf3/multicall----------------
2023-06-20 16:59:03		信息	0x27457ada2dd725c7d0f28e1737bdd0bf583c0f0b -> 0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45
2023-06-20 16:59:03		信息	----------------swapExactTokensForTokens----------------
2023-06-20 16:59:03		信息	amountIn: "816769666850161"
2023-06-20 16:59:03		信息	amountOutMin: "40404501509302321"
2023-06-20 16:59:03		信息	path: ["0x7863e06bca47ded821fcb53ab788eeb371243eda","0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"]
2023-06-20 16:59:03		信息	to: "0x27457ada2dd725c7d0f28e1737bdd0bf583c0f0b"
2023-06-20 16:58:25		信息	sigHash: 0x5ae401dc

Une capture d'écran:

On peut voir que le hash de transaction est0x5288a7bd6e0f57162ca763df722de73793e542734d7d2b7af5755664e2e67910La transaction, les données d'entrée contenues dans les appels sont unmulticallL'appel de la méthode. Cette transaction est envoyée dans la direction suivante: 0x851b594033d57c98af753bcb3a7d0237a615de32 -> 0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45.0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45Il s'agit de l'adresse du contrat de routage d'Uniswap.

C'est résolu.multicallLe paquet appelle le contratexactInputSingleetunwrapWETH9Les méthodes et les paramètres spécifiques de ces méthodes.

----------------exactInputSingle----------------
params: {
    "tokenOut":"0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "fee":"10000",
    "recipient":"0x0000000000000000000000000000000000000002",
    "amountIn":"8952087000296027130940868",
    "amountOutMinimum":"41638694112306829",
    "sqrtPriceLimitX96":"0",
    "tokenIn":"0xe1283567345349942acdfad3692924a1b16cf3cc"
}

----------------unwrapWETH9----------------
amountMinimum: "41638694112306829"
recipient: "0x851b594033d57c98af753bcb3a7d0237a615de32"

Les élèves intéressés peuvent modifier, étendre, surveiller plus de transactions et analyser les opérations sur la chaîne en se basant sur cet exemple.

Page précédente

Plus de

2019 FMZ - Tous les droits réservés