EDIT The allowance is set, the issue is just that metamask detect no token name nor amount that is allowed.

In my HTML/JS

amount = parseInt(web3.toWei(amount, "ether" )); tokeninstance.approve(mainadd,amount,function(error, transactionHash){ if (!error){ $("#allowanceresult").html("TX hash: "+transactionHash+"<br>") toastr.success("Approval successfull!") }else{ $("#allowanceresult").html("Error: "+error+"<br>") toastr.error("Approval failed!"); }

In Solidity interface

function approve(address guy, uint wad) public returns (bool);

Doing the approve function in remix manually work, I'm on ropsten, but using metamask + the HTML/JS dapp function up there, getting user input (show correctly in wei) and input predefined address (correct format), metamask show me this, still on ropsten:

Am I missing something? It's always like that I made my send() web3.js functions, I use the same web3.js file than I always do.

Checking on ropsten both side by side Event (from remix and metamask), it's clearly both same data inputed, same address and same wei ammount. :(