how to sign transaction during contract deployment

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I am looking at the web3js documentation to deploy a new contract, however, I see no mention of how to sign the transaction that will deploy the contract in the blockchain...document makes no mention of signing with private key...will appreciate any insight into this

here is the example code snippet from the docs (https://web3js.readthedocs.io/en/1.0/web3-eth-contract.html#eth-contract)

myContract.deploy( data: '0x12345...', arguments: [123, 'My String'] ) .send( from: '0x1234567890123456789012345678901234567891', gas: 1500000, gasPrice: '30000000000000' , function(error, transactionHash) ... ) .on('error', function(error) ... ) .on('transactionHash', function(transactionHash) ... ) .on('receipt', function(receipt) console.log(receipt.contractAddress) // contains the new contract address ) .on('confirmation', function(confirmationNumber, receipt) ... ) .then(function(newContractInstance) console.log(newContractInstance.options.address) // instance with the new contract address );

asked Sep 3 at 5:55

satyendra

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here is the example code snippet from the docs (https://web3js.readthedocs.io/en/1.0/web3-eth-contract.html#eth-contract)

asked Sep 3 at 5:55

satyendra

304

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here is the example code snippet from the docs (https://web3js.readthedocs.io/en/1.0/web3-eth-contract.html#eth-contract)

asked Sep 3 at 5:55

satyendra

304

here is the example code snippet from the docs (https://web3js.readthedocs.io/en/1.0/web3-eth-contract.html#eth-contract)

asked Sep 3 at 5:55

satyendra

304

asked Sep 3 at 5:55

satyendra

304

asked Sep 3 at 5:55

satyendra

304

asked Sep 3 at 5:55

satyendra

304

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3 Answers
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enter image description here

This is the method which can be used to sign transactions.

answered Sep 3 at 12:36

Puneet Kumar

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2
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Try this (using web3.js v1):

let fs = require("fs");
let Web3 = require("web3");

let web3 = new Web3(NODE_ADDRESS);

async function send(transaction) 
 let gas = await transaction.estimateGas(from: PUBLIC_KEY);
 let options = 
 to : transaction._parent._address,
 data: transaction.encodeABI(),
 gas : gas
 ;
 let signedTransaction = await web3.eth.accounts.signTransaction(options, PRIVATE_KEY);
 return await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);


async function deploy(contractName, contractArgs) 
 let abi = fs.readFileSync(contractName + ".abi").toString();
 let bin = fs.readFileSync(contractName + ".bin").toString();
 let contract = new web3.eth.Contract(JSON.parse(abi));
 let handle = await send(contract.deploy(data: "0x" + bin, arguments: contractArgs));
 console.log(`$contractName contract deployed at address $handle.contractAddress`);
 return new web3.eth.Contract(JSON.parse(abi), handle.contractAddress);


async function run() 
 let myContract = await deploy("MyContract", [123, "My String"]);
 ...

answered Sep 3 at 7:03

goodvibration

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up vote
2
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Using Web3.js 1.0.0

 var contractInstance = new web3.eth.Contract(contractABI);
var deployData = contractInstance.deploy(
 data : contractByteCode
).encodeABI();

var tx = 
 data : deployData
;

web3.eth.accounts.signTransaction(tx, privateKey).then (signed => 
 web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', console.log)
);

signTransaction is the function you need to sign your transaction with the private key. For that you need to construct a transaction with the required data for the contract deployment i.e. contract abi and its byte code. Now, you can sign the trasaction and send it. You will get contract address of the newly deployed contract and other information in transaction receipt.

edited Sep 3 at 7:57

answered Sep 3 at 6:54

biplavo

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

up vote
3
down vote

enter image description here

This is the method which can be used to sign transactions.

answered Sep 3 at 12:36

Puneet Kumar

47314

add a commentÂ |Â

up vote
3
down vote

enter image description here

This is the method which can be used to sign transactions.

answered Sep 3 at 12:36

Puneet Kumar

47314

add a commentÂ |Â

up vote
3
down vote

enter image description here

This is the method which can be used to sign transactions.

answered Sep 3 at 12:36

Puneet Kumar

47314

enter image description here

This is the method which can be used to sign transactions.

answered Sep 3 at 12:36

Puneet Kumar

47314

answered Sep 3 at 12:36

Puneet Kumar

47314

answered Sep 3 at 12:36

Puneet Kumar

47314

answered Sep 3 at 12:36

Puneet Kumar

47314

add a commentÂ |Â

up vote
2
down vote

Try this (using web3.js v1):

let fs = require("fs");
let Web3 = require("web3");

let web3 = new Web3(NODE_ADDRESS);

async function send(transaction) 
 let gas = await transaction.estimateGas(from: PUBLIC_KEY);
 let options = 
 to : transaction._parent._address,
 data: transaction.encodeABI(),
 gas : gas
 ;
 let signedTransaction = await web3.eth.accounts.signTransaction(options, PRIVATE_KEY);
 return await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);


async function deploy(contractName, contractArgs) 
 let abi = fs.readFileSync(contractName + ".abi").toString();
 let bin = fs.readFileSync(contractName + ".bin").toString();
 let contract = new web3.eth.Contract(JSON.parse(abi));
 let handle = await send(contract.deploy(data: "0x" + bin, arguments: contractArgs));
 console.log(`$contractName contract deployed at address $handle.contractAddress`);
 return new web3.eth.Contract(JSON.parse(abi), handle.contractAddress);


async function run() 
 let myContract = await deploy("MyContract", [123, "My String"]);
 ...

answered Sep 3 at 7:03

goodvibration

1,754519

add a commentÂ |Â

up vote
2
down vote

Try this (using web3.js v1):

let fs = require("fs");
let Web3 = require("web3");

let web3 = new Web3(NODE_ADDRESS);

async function send(transaction) 
 let gas = await transaction.estimateGas(from: PUBLIC_KEY);
 let options = 
 to : transaction._parent._address,
 data: transaction.encodeABI(),
 gas : gas
 ;
 let signedTransaction = await web3.eth.accounts.signTransaction(options, PRIVATE_KEY);
 return await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);


async function deploy(contractName, contractArgs) 
 let abi = fs.readFileSync(contractName + ".abi").toString();
 let bin = fs.readFileSync(contractName + ".bin").toString();
 let contract = new web3.eth.Contract(JSON.parse(abi));
 let handle = await send(contract.deploy(data: "0x" + bin, arguments: contractArgs));
 console.log(`$contractName contract deployed at address $handle.contractAddress`);
 return new web3.eth.Contract(JSON.parse(abi), handle.contractAddress);


async function run() 
 let myContract = await deploy("MyContract", [123, "My String"]);
 ...

answered Sep 3 at 7:03

goodvibration

1,754519

add a commentÂ |Â

up vote
2
down vote

Try this (using web3.js v1):

let fs = require("fs");
let Web3 = require("web3");

let web3 = new Web3(NODE_ADDRESS);

async function send(transaction) 
 let gas = await transaction.estimateGas(from: PUBLIC_KEY);
 let options = 
 to : transaction._parent._address,
 data: transaction.encodeABI(),
 gas : gas
 ;
 let signedTransaction = await web3.eth.accounts.signTransaction(options, PRIVATE_KEY);
 return await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);


async function deploy(contractName, contractArgs) 
 let abi = fs.readFileSync(contractName + ".abi").toString();
 let bin = fs.readFileSync(contractName + ".bin").toString();
 let contract = new web3.eth.Contract(JSON.parse(abi));
 let handle = await send(contract.deploy(data: "0x" + bin, arguments: contractArgs));
 console.log(`$contractName contract deployed at address $handle.contractAddress`);
 return new web3.eth.Contract(JSON.parse(abi), handle.contractAddress);


async function run() 
 let myContract = await deploy("MyContract", [123, "My String"]);
 ...

answered Sep 3 at 7:03

goodvibration

1,754519

Try this (using web3.js v1):

let fs = require("fs");
let Web3 = require("web3");

let web3 = new Web3(NODE_ADDRESS);

async function send(transaction) 
 let gas = await transaction.estimateGas(from: PUBLIC_KEY);
 let options = 
 to : transaction._parent._address,
 data: transaction.encodeABI(),
 gas : gas
 ;
 let signedTransaction = await web3.eth.accounts.signTransaction(options, PRIVATE_KEY);
 return await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);


async function deploy(contractName, contractArgs) 
 let abi = fs.readFileSync(contractName + ".abi").toString();
 let bin = fs.readFileSync(contractName + ".bin").toString();
 let contract = new web3.eth.Contract(JSON.parse(abi));
 let handle = await send(contract.deploy(data: "0x" + bin, arguments: contractArgs));
 console.log(`$contractName contract deployed at address $handle.contractAddress`);
 return new web3.eth.Contract(JSON.parse(abi), handle.contractAddress);


async function run() 
 let myContract = await deploy("MyContract", [123, "My String"]);
 ...

answered Sep 3 at 7:03

goodvibration

1,754519

answered Sep 3 at 7:03

goodvibration

1,754519

answered Sep 3 at 7:03

goodvibration

1,754519

answered Sep 3 at 7:03

goodvibration

1,754519

add a commentÂ |Â

up vote
2
down vote

Using Web3.js 1.0.0

 var contractInstance = new web3.eth.Contract(contractABI);
var deployData = contractInstance.deploy(
 data : contractByteCode
).encodeABI();

var tx = 
 data : deployData
;

web3.eth.accounts.signTransaction(tx, privateKey).then (signed => 
 web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', console.log)
);

edited Sep 3 at 7:57

answered Sep 3 at 6:54

biplavo

32117

add a commentÂ |Â

up vote
2
down vote

Using Web3.js 1.0.0

 var contractInstance = new web3.eth.Contract(contractABI);
var deployData = contractInstance.deploy(
 data : contractByteCode
).encodeABI();

var tx = 
 data : deployData
;

web3.eth.accounts.signTransaction(tx, privateKey).then (signed => 
 web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', console.log)
);

edited Sep 3 at 7:57

answered Sep 3 at 6:54

biplavo

32117

add a commentÂ |Â

up vote
2
down vote

Using Web3.js 1.0.0

 var contractInstance = new web3.eth.Contract(contractABI);
var deployData = contractInstance.deploy(
 data : contractByteCode
).encodeABI();

var tx = 
 data : deployData
;

web3.eth.accounts.signTransaction(tx, privateKey).then (signed => 
 web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', console.log)
);

edited Sep 3 at 7:57

answered Sep 3 at 6:54

biplavo

32117

Using Web3.js 1.0.0

 var contractInstance = new web3.eth.Contract(contractABI);
var deployData = contractInstance.deploy(
 data : contractByteCode
).encodeABI();

var tx = 
 data : deployData
;

web3.eth.accounts.signTransaction(tx, privateKey).then (signed => 
 web3.eth.sendSignedTransaction(signed.rawTransaction).on('receipt', console.log)
);

edited Sep 3 at 7:57

answered Sep 3 at 6:54

biplavo

32117

edited Sep 3 at 7:57

answered Sep 3 at 6:54

biplavo

32117

answered Sep 3 at 6:54

biplavo

32117

answered Sep 3 at 6:54

biplavo

32117

add a commentÂ |Â

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