1
Change this:
var testContract = contract(customerJson);
To this:
var testContract = contract({abi: customerJs.abi, unlinked_binary: ByteCode});
1
With web3.js v1.x, you can use this:
const PARTIAL_ABI = [{
"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",
}];
async ...
1
Well, the error says it all. Your smart contract abi definition is not defined in the javascript. You can read more about abi definition here. And btw your code looks a bit of a mess. Replace the 3 definitions of the contract inferfaces:
var ApprovalContract = web3.eth.contract(abi).at(contractAddress);
var ApprovalContract = new web3.eth.Contract(abi, ...
1
IIRC, solc 0.5.17 is pre-Byzantium and you need to transition to 0.5.2? (not 100% sure which one). Perhaps a kind soul will chime in with the exact version cutoff or else check the release notes for the first release with Byzantium support.
You can instruct truffle to use a specific solc version truffle-config.json. You may have to refactor the contract ...
1
Turns out the answer is the format of the string being given to ruby's SHA3 implementation:
'0x' + Digest::SHA3.new(256).hexdigest("\xff")
will give the same output as:
web3.utils.sha3('0xff');
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