Envoyer un jeton ERC20 avec web3
J'utilise actuellement la version 0.2x.x de l'API Javascript Web3. J'ai déployé mon jeton ERC20 personnalisé en créant un contrat intelligent solidement (sur REMIX IDE) . J'ai installé le MetaMask et j'ai effectué un test sur https://wallet.ethereum.org/ pour envoyer un jeton ERC personnalisé à un autre mon compte. Cela a bien fonctionné Je souhaite ajouter la fonction "envoyer un jeton ERC20 personnalisé" dans mon code javascript à l'aide de Web3.
Voici mon code ci-dessous.
var http = require('http');
var Web3 = require('web3');
var Tx = require('ethereumjs-tx');
var abi = [{"...."}];
var data = '0x00..';
var contract_addr = '0x00..';
var owner = '0x00..';
var web3 = new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/"));
web3.eth.getBlock("latest", (error, result) => {
//console.log('error:', error);
//console.log('results', result);
});
var myContract = web3.eth.contract(abi);
var myContractInstance = myContract.at(address);
eb3.eth.getDefaultAccount = owner;
var defaultAccount = web3.eth.getDefaultAccount;
console.log('DefaultAccount => ', defaultAccount);
var total = myContractInstance.totalSupply();
var balance = myContractInstance.balanceOf(defaultAccount);
console.log('DefulatAccount total => ',total);
console.log('DefaultAccount balance => ',balance);
var to = '0x00..';
var isAddress = web3.isAddress(to);
console.log('isAddress(to) => ',isAddress);
console.log('balanceOf(to) => ',myContractInstance.balanceOf(to));
Je travaille sur le 'Ropsten Testnet' et j'ai envoyé un test 'Ether' à l'aide de sendRawTransaction(). Mais ce que je veux faire, c'est simplement envoyer mon jeton ERC20 personnalisé. pas l'éther. Comment puis-je envoyer mon propre jeton dans ce script? Je n'ai aucune idée. J'ai essayé d'utiliser sendTransaction() comme ci-dessous.
var rawTx = {
from : defaultAccount,
nonce : nonceHex,
gasPrice : gasPriceHex,
gas : gasHex,
to : to,
value : 100,
data : data
};
web3.eth.sendTransaction(rawTx, function(err, transactionHash) {
if (!err)
console.log('transactionHash => ',transactionHash);
else
console.log(err);
});
J'ai continuellement reçu l'erreur.
Error: Invalid JSON RPC response: ""
at Object.InvalidResponse (/Users/rachel/dev/test/node_modules/web3/lib/web3/errors.js:38:16)
at XMLHttpRequest.request.onreadystatechange (/Users/rachel/dev/test/node_modules/web3/lib/web3/httpprovider.js:119:24)
at XMLHttpRequestEventTarget.dispatchEvent (/Users/rachel/dev/test/node_modules/xhr2/lib/xhr2.js:64:18)
at XMLHttpRequest._setReadyState (/Users/rachel/dev/test/node_modules/xhr2/lib/xhr2.js:354:12)
at XMLHttpRequest._onHttpResponseEnd (/Users/rachel/dev/test/node_modules/xhr2/lib/xhr2.js:509:12)
at IncomingMessage.<anonymous> (/Users/rachel/dev/test/node_modules/xhr2/lib/xhr2.js:469:24)
at emitNone (events.js:111:20)
at IncomingMessage.emit (events.js:208:7)
at endReadableNT (_stream_readable.js:1056:12)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
Je ne peux vraiment pas comprendre ce qui ne va pas. S'il vous plaît laissez-moi savoir un moyen de traiter avec cela. Merci!
Prenons l'exemple du transfert de jeton EOS.
Le code ci-dessous nécessite web3 et ethereumjs-tx. Si vous ne les avez pas installées, installez-les avec npm install web3 ethereumjs-tx
var Tx = require('ethereumjs-tx');
var Web3 = require('web3')
var web3 = new Web3(new Web3.providers.HttpProvider('http://127.0.0.1:8545/'))
// set token source, destination and amount
var myAddress = "0xaa597b7e8aaffe9f2a187bedb472ef3455957560"
var toAddress = "0xa013927bffe9e879134061b9330a01884a65497c"
var amount = web3.utils.toHex(1e16)
// get transaction count, later will used as nonce
web3.eth.getTransactionCount(myAddress).then(function(v){console.log(v); count = v})
// set your private key here, we'll sign the transaction below
var privateKey = new Buffer('6d...', 'hex')
// Get abi array here https://etherscan.io/address/0x86fa049857e0209aa7d9e616f7eb3b3b78ecfdb0#code
var abiArray = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"stop","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"owner_","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"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,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint128"}],"name":"Push","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"name_","type":"bytes32"}],"name":"setName","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint128"}],"name":"mint","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"stopped","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"authority_","type":"address"}],"name":"setAuthority","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"wad","type":"uint128"}],"name":"pull","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint128"}],"name":"burn","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"start","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"authority","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"},{"name":"guy","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"inputs":[{"name":"symbol_","type":"bytes32"}],"payable":false,"type":"constructor"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"authority","type":"address"}],"name":"LogSetAuthority","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"}],"name":"LogSetOwner","type":"event"},{"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"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]
// Here you may get the abicode from a string or a file, here is a string case
// var abiArray = JSON.parse('[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"stop","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"owner_","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"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,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint128"}],"name":"Push","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"name_","type":"bytes32"}],"name":"setName","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint128"}],"name":"mint","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"stopped","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"authority_","type":"address"}],"name":"setAuthority","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"wad","type":"uint128"}],"name":"pull","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint128"}],"name":"burn","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"start","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"authority","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"},{"name":"guy","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"inputs":[{"name":"symbol_","type":"bytes32"}],"payable":false,"type":"constructor"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"authority","type":"address"}],"name":"LogSetAuthority","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"}],"name":"LogSetOwner","type":"event"},{"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"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]', 'utf-8')
var contractAddress = '0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0'
var contract = new web3.eth.Contract(abiArray, contractAddress, {from: myAddress})
var rawTransaction = {"from":myAddress, "gasPrice":web3.utils.toHex(2 * 1e9),"gasLimit":web3.utils.toHex(210000),"to":contractAddress,"value":"0x0","data":contract.methods.transfer(toAddress, amount).encodeABI(),"nonce":web3.utils.toHex(count)}
var transaction = new Tx(rawTransaction)
transaction.sign(privateKey)
web3.eth.sendSignedTransaction('0x' + transaction.serialize().toString('hex'))
// check the balance
contract.methods.balanceOf(myAddress).call().then(function(balance){console.log(balance)})
Vous pouvez également vérifier la transaction avec https://etherscan.io .
Après l'envoi de la transaction, vous pouvez la vérifier avec https://etherscan.io/address/0xaa597b7e8aaffe9f2a187bedb472ef3455957560#tokentxns , et vous verrez la transaction en attente comme indiqué ci-dessous dans la Transactions classée, mais vous ne la voyez pas dans Token Transfers champ.
Attendez environ 1 minute, vous pouvez voir le succès de Transactions archivé et du champ Token Transfers.
Eh bien, vous pouvez essayer quelque chose comme ceci-:
`myContractInstance.transfer(to,amount, {gas:estimateGas,
gasPrice:gasPrice,from:fromAddr, nonce: nonceis}, function(err,txhash)
{
console.log("error: "+err);
console.log("txhash: "+txhash);
}
`
Ici 'to' est l'adresse à laquelle vous voulez envoyer des jetons
' montant ' quantité de jetons que vous souhaitez envoyer
' estimationGaz ' limite de gaz que vous voulez mettre de l'exécution de la transaction
' gasPrice ' prix de chaque unité de gaz en termes de wei
' fromAddr ' l'adresse à partir de laquelle vous voulez envoyer ces jetons. Comme la transaction sera signée en utilisant cette adresse, celle-ci doit être celle sélectionnée dans la métamasque ou transmise à
' nonceis ' nonce pour la transaction
Erreur: Réponse JSON RPC non valide: "" signifie que le Web3 ne peut pas se connecter au noeud rpc . Essayez d’en exécuter un avec:
-pour Testnet
geth --testnet --rpc --rpcaddr 127.0.0.1 --rpcport 8545 --rpccorsdomain '*' --rpcapi personal,admin,db,eth,net,web3,miner,shh,txpool,debug --ws --wsaddr 127.0.0.1 --wsport 8546 --wsorigins '*' --wsapi personal,admin,db,eth,net,web3,miner,shh,txpool,debug --maxpeers 25 0 --gasprice 100
-pour le réseau principal
geth --rpc --rpcaddr 127.0.0.1 --rpcport 8545 --rpccorsdomain '*' --rpcapi personal,admin,db,eth,net,web3,miner,shh,txpool,debug --ws --wsaddr 127.0.0.1 --wsport 8546 --wsorigins '*' --wsapi personal,admin,db,eth,net,web3,miner,shh,txpool,debug --maxpeers 25 0 --gasprice 100
Maintenant, dans votre cas (en utilisant infura testnet node), obtenez un id de infura.io . Cela devrait être comme ceci:
https://ropsten.infura.io/id