Ethers.js: Intracting With Contract provider.resolveName is not A Function

[dagogodboss]

Trying to interact with contract token deployed on the Ethereum Node.
Most of the Functions seems to work fine except for my transfer() function which is supposed to send a token to a given address.
However, when I try to send using this code
```
var contract = new ether.Contract(contract_address, abi, provider);
var callPromise = contract.functions.transfer(receiver_address, "5000");

it gives
 ```

2018-01-31T05:21:09.159386+00:00 app[web.1]: (node:4) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Error: missing signer

2018-01-31T05:21:09.159465+00:00 app[web.1]: (node:4) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

So I tried to sign it using

         signer = new ether.Wallet(prvkey);
     provider = ether.providers.getDefaultProvider()
     var contract = new ether.Contract(add, abi, signer.address, provider);
     var callPromise = contract.functions.transfer(receiver_address, "5000");

it gives

              provider.resolveName is not a function
              at new Contract (C:\xampp\htdocs\EtherWallet\node_modules\ethers-contracts\contract.js:57:35)

So what am I doing wrong? please assit me get this right.

[ricmoo]

Heya!

You need to attach the provider to the signer, and then pass the signer into the contract:

var provider = ether.providers.getDefaultProvider();
var signer = new ether.Wallet(privateKey, provider);
var contract = new ether.Contract(contractAddress, abi, signer);

After that, everything should work fine. Let me know though if there are any issues.

[dagogodboss]

Thanks, man it works like magic. Am grateful that you ricmoo is the one to answer me on time. should my contract address have ether on it? because I am getting insufficient funds for gas * price + value
I would like to add a link to my project for a user to use cause I have built it in an API Format so all users or developers.

[ricmoo]

The contract does not require funds.

The EOA (Externally Owned Account) which is the address associated with the prvKey does require funds to execute the transfer, though.

[dagogodboss]

Ok but I think do, how do I reduce the gas limit I think the limit is above $14

[ricmoo]

There is certainly something wrong there. What gas price is it using? You can override the gas price using:

`javascript var options = { gasPrice: 1100000000, // 1.1Gwei gasLimit: 250000 // Should be enough for more transfer transactions }; contract.transfer(targetAddress, value, options).then(function(tx) { console.log(tx); });

The default gas price should be fine, since it comes from the node, but sometimes it isn't quite right; that said $14 seems very high.

[dagogodboss]

Error: too many parameters my transfer function only accept two parameters. Using the gasPrice promise with the Provider the gas price is 13000000000

[ricmoo]

Do you have the latest version? This bug was addressed over the last couple days.

All contract transaction functions can take in 1 optional additional parameter to override gasPrice, gasLimit, nonce and value.

[ricmoo]

(the node_modules/ethers/package.json version should be 2.2.4)

[dagogodboss]

2.2.4 is what am using now what am getting now is

code | -32000
-- | --
url | "https://mainnet.infura.io/"
body | "{\"method\":\"eth_sendRawTransaction\",\"params\":[\"0xf8a910844190ab008303d0909428abc25b4d4530720b99e051e79899642c3291e380b844a9059cbb00000000000000000000000006ae947db37c62f545dedf844d3c91721c38613a000000000000000000000000000000000000000000000000000000000000138825a07f6e7070a094b609f7b9460f35b5daf20192a9c1ac938471f23820cd67039420a055a7c0eb8f06b408309b386ad3f94ed339c01714c725d1df620b229870130798\"],\"id\":42,\"jsonrpc\":\"2.0\"}"
responseText | "{\"jsonrpc\":\"2.0\",\"id\":42,\"error\":{\"code\":-32000,\"message\":\"known transaction: 93957894c7db9472585213b771cf0d0f932268a7eabed5172187b4c35e62d812\"}}\n"

[dagogodboss]

this is my full code

var abi = require('./abi.json'), 
            add = 'Contract_address', 
            provider = ether.providers.getDefaultProvider();
            signer = new ether.Wallet("prvkey", provider);
        var contract = new ether.Contract(add, abi, signer);
        var options = {
            gasPrice: 1100000000, // 1.1Gwei
            gasLimit: 250000 // Should be enough for more transfer transactions
        };
        var callPromise = contract.transfer("addres_toReceive", "5000", options);
        callPromise.then(function(obj){
            res.send(obj)
        })

        callPromise.catch(function(error){
            res.send(error)
        });

Please assist .

[ricmoo]

That error means your transaction is already on the network, and just hasn't been mined yet.

Here is your transaction: https://etherscan.io/tx/0x93957894c7db9472585213b771cf0d0f932268a7eabed5172187b4c35e62d812

The network is currently quite congested, so it may take some time to confirm. You can see the current gas prices required here: https://ethgasstation.info

You can try replacing your transaction with a new one by using the same nonce and a gas price at least 50% more than the current transaction on the network.

[dagogodboss]

Wow Thanks that is nice to know execllent.