2
I fixed it. Add this code in app.js:
// MetaMask injects its own web3 instance in all pages, override it
// as it might be not compatible with the one used here
if (window.web3)
window.web3 = web3;
2
Get the contract object via:
const contract = await new web3.eth.Contract(JSON.parse(interface), smartContractAddress);
2
You can try events, check this out: https://solidity.readthedocs.io/en/v0.5.10/structure-of-a-contract.html?highlight=events#events
1
I changed genesis.json now it is working
{
"config": {
"chainId": 9663080,
"homesteadBlock": 0,
"eip150Block": 0,
"eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"eip155Block": 0,
"eip158Block": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 0,
"petersburgBlock": 0,
"ethash": {}
},
"nonce": "0x0",
"timestamp": "0x5d5cdc87"...
1
The simple answer is to use web3.utils.soliditySha3.
But the way to use it is what makes all the difference.
const theValueYouNeed = web3.utils.soliditySha3(
{ type: 'bytes32', value: theBytes32Value },
{ type: 'address', value: theAddressValue },
{ type: 'bytes32', value: 'IfYouAreDirectlyPuttingValueUseQuotes' });
This way you will get the same result ...
1
Methods of a contract can be accessed by methods method of a contract instance. And the transaction can be either called by call() method or sent by send() method.
So, you should use smth like that:
contractInstance.methods.notarize(item).send((e,r) => {console.log(e,r)})
See more info in the web3js documentation.
1
Something that may be of interest is https://squarelink.com/
Other than that, metamask is ahead of everyone else as far as I know.
1
I think this will work:
result.events.numberSaved.returnValues['number']
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