6

Please excuse what seems to me a basic question, as I am very new to this:

I'm using the truffle framework to deploy a smart contract. Playing around with Open zeppelin standard tokens, I've issued the SampleCrowdsale.sol contract: Link

I've successfully got it on the Ropsten blockchain, but that's as far as my knowledge goes. How can I interact with the contract, other than sending ether to it?

As an owner, how can I call the mint function that's part of the MintableToken.sol contract?

Thank you.

2

Have a look at Interacting with smart contracts using truffles.

If you deployed your smart contract with the name SampleCrowdsale, for example with

var mycrowdsale = SampleCrowdsale.deployed();

then you have access to the function mint():

mycrowdsale.mint(to, amount);

with to as the receiver address and amount the number of tokens created.

You can also check it works with:

mycrowdsale.mint(to, amount).then(function(balanceOf(to)) {
  // If this callback is called, the call was successfully executed.
  // Note that this returns immediately without any waiting.
  // Let's print the return value.
  console.log(balance.toNumber());
}).catch(function(e) {
  // There was an error! Handle it.
})

balanceOf is a standard ERC20 function.

You can look at this Interacting with your contracts tutorial where I took the example.

  • 1
    Thanks for your answer. When I try calling mycrowdsale.mint(to, amount); I get: TypeError: sc.mint is not a function I'm calling the contract through: var sc = SampleCrowdsale.at("0x..."); – Guid0 Sep 14 '17 at 12:49
0
    erc20ContractName receiver = erc20ContractName(contractAddress);
    var isOkToCall = receiver.tokenFallback(msg.sender, _value, _data);
    var myBalance = receiver.balanceOf(msg.sender);

Polymorphism / How to interact with deployed contract / ERC20 tokens ... how to call functions in deployed contract /how to call deployed token erc20 contract solidity

See similar question: How does this code from ERC223 standard implementation work?

0

You can follow the following steps :

  1. Test using following command

    truffle test

  2. Compile :

    truffle compile

  3. Develop :

    truffle develop

  4. Deploy and create an instance and accept that instance in a variable as follows :

    SampleCrowdsale.deployed().then(function(instance) {app = instance})

Now you can use this variable app to access all the functions inside the contract.

Ex: app.mint(to, amount);

Source : Truffle Framework

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