2
check this question - https://stackoverflow.com/questions/5786851/define-global-variable-in-a-javascript-function
If web3 is not defined as a global variable, but you have "web3 = new Web3(web3.currentProvider)" inside a function - the web3 object will be local for that function only, while with window.web3 it will be globaly accessible
1
There is no dist folder (containing the web3.min.js file) in the latest versions (1.x)
You can select tag 0.20.7 on github before downloading the zip - it contains a ready to use web3.min.js
1
First you need to write and deploy a simple storage smart-contract (with solidity and truffle), then you need to use the web3js library to connect to the blockchain and later to call your function in the smart-contract --> send a transaction to upload the hash of the file in your deployed smart contract
The web3 library provide a function to calcuate the ...
1
I hope this will work for you,
const contract = new web3.eth.Contract(abi);
const estimateGas = await contract.deploy({
data: bytecode
}).estimateGas();
contract.deploy({
data: bytecode,
arguments: ['TestToken', 'Token', 18, '1000000000000000000000']
})
.send({
from: yourAddress,
gas: estimateGas,
})
.on('error', (error) => {
console.log(...
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