2
Yes.
You can use the getCode API. If that call returns 0x, there is no contract at that address. If it returns anything other than 0x, there is a contract at that address.
As an example:
web3.eth.getCode("0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8")
.then(console.log);
> "...
1
Turns out I can only get the transaction hash for the _mint call, but I was able to recover the data (currentTokenId) by checking the transaction event by it's hash.
I'm not sure it's the best solution but here is how I've done it :
this.mint = function(callback) {
var mintTxHash = null
this.contract.methods.mint().send({from: this.account}, function(...
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