Learning Truffle

Ethereum Smart Contract Programming 201
#84

Hi @inzhagey,
I had the same problem and I uncommented version and updated to the version I’m using and it worked.
image

3 Likes
#85

yay it worked, thank you!

1 Like
#86

I’m glad I could help ! :slight_smile:

1 Like
#87

I am just learning - try deleting the slashes // so that it reads:
version: “0.8.3”,

without the //

1 Like
#88

I don’t know how it got so screwed up but I restarted from scratch and it’s working now

#89

Dani, sorry to ask, I could not figure out how to use the “createTransfer()” function.

function createTransfer(uint _amount, address payable _receiver) public onlyOwners {
        emit transferRequestsCreated(transferRequests.length, _amount, msg.sender, _receiver);
        transferRequests.push(
            Transfer(_amount, _receiver, 0, false, transferRequests.length)
        );

Here is one out many, I tried…

await instance.createTransfer({value: web3.utils.toWei('1', 'ether'), to: accounts[1]
})

and here is one more attmept

await instance.createTransfer(accounts[1], 1000000000000000000, {from: accounts[0]})

and a third variation:

await instance.createTransfer(accounts[1], {value: web3.utils.toWei('1', 'ether'), from: accounts[0]})
#90

Hi @jakegoode95

Push you code on github and share the repo, I will take a look.

1 Like
#91

Hi @Karla

Run sudo npm i -g truffle and check again.
Let me know.

1 Like
#92

Hi @bjamRez

function createTransfer(uint _amount, address payable _receiver) 

await instance.createTransfer(10000000, 0x0000000000 , {from:accounts[0]})

The from account must be the owner of the contract.

1 Like
#93

https://github.com/jakegoode95/Truffle-ERC20

#94

thanks so much - I was trying to do it myself - thank you

1 Like
#95

One addition to this script, the address to must be under quotes, it seems…“0x0000000000”

1 Like
#96

Do you think I will get issues down the line if I only use the terminal window? It still doesn’t work in VSC and now says sudo can’t be found. Terminal window works as it’s supposed to be.

#97

hi there, so how did you manage to deposit to specific accounts?

#98

Hello Dani, I’ve been trying all day to deposit and transfer. Transactions and approvals seem to be going through but when I check the getBalance() function as you showed with console.log(parseInt(res)), the balance remains the same and the other accounts [1] and [2] show 0 balance. Here is what I did.

await instance.deposit({value: web3.utils.toWei('2', 'ether'), from: accounts[0], to: accounts[1] } )

let res2 = await instance.getWalletBalance({from: accounts[1]}) 

console.log(parseInt(res2))

here is the approve func

await instance.approve('0', {from: "0x87710DfA8D5210d21A44bCB9947755DA22f3A707"})

…I switch addresses twice to meet the limit 2 criteria

#99

Hi @jakegoode95

Upload the full truffle project so that I can deploy.

Thanks
Dani

#101

Hey Dani, update I’m still stuck. I tried both of the methods you told me to try, and I always get this error no matter what I do.

Capture4

Capture5

#102

Hi @dan-i

Think i’ve uploaded everything is there anything else i’m missing to stop you from deploying?

Thanks!

#103

Hi Cecilia, I am a student also. I don’t know if this is the best way to to write this but it worked for me…

module.exports = function (deployer, accounts) {
  uint = 2;
  const userAddress = accounts[0,1,2];
  deployer.deploy(Wallet, ["0xdc6bbc41d7ff0accd096969921067c07cd3b0d37", "0xe8b2ef888b7059907fe4eeed19892aac95c7e961", "0x87710DfA8D5210d21A44bCB9947755DA22f3A707"], 2);
};
3 Likes
#104

Hey Dani, I am now practicing with the ERC20 from Open Zeppelin and I seem to be understanding it and able to interact with the contract via Truffle. But one thing though.
When I get the balance from accounts, I get back Big Number reading correctly…

truffle(develop)> instance.balanceOf(accounts[0])
BN {
  negative: 0,
  words: [ 6320, <1 empty item> ],
  length: 1,
  red: null
}

but if I try to get this same result back using

let res = await instance.balanceOf(accounts[0])
res.toNumber()

I get back 0
I don’t get why it returns 0 instead of the result?