Buy token in localhost:7545

[Nghialm]

Hi, I get you solution and run buy tokens in web.
It has error below,
Please check for me

Thanks

[ZainaliSyed]

@gwmccubbin I am also facing same issue , please guide us what i am missing

[gwmccubbin]

@ZainaliSyed @Nghialm Hey there! Have you all tried resetting your Metamask account? You always need to do this after restarting ganache:

https://consensys.zendesk.com/hc/en-us/articles/360004177531-Resetting-an-Account-New-UI-

Also, do you still get this issue of you clone the code from the master branch?

[ZainaliSyed]

@gwmccubbin

Thank you for your time , Still facing same i had , failure in MetaMask transaction

1. git pull origin master
2. reset my MetaMask Account as well
3. truffle compile
4. truffle migtate --network=development --reset

Meta MAsk Version: 4.9.3
Ganache version : 1.2.1

[gwmccubbin]

@ZainaliSyed Try this order?

git pull origin master
truffle compile
truffle migtate --network=development --reset
reset my MetaMask Account as well

[joaocarlosleme]

Same problem here. Solved by commenting out //require(tokenContract.balanceOf(this) >= _numberOfTokens); on DappTokenSale.sol (tokens are on Admin account, not ContractAccount I guess), and also commenting out //require(balanceOf[msg.sender] >= _value); on DappToken.sol, because sender may start with 0 dapps.

@gwmccubbin please check it out and let me know.

[ahsidd96]

@joaocarlosleme yes commenting out the required lines do solve the problem but is it really safe (in terms of coding) to do this?
@gwmccubbin Please help us out.

[joaocarlosleme]

@joaocarlosleme yes commenting out the required lines do solve the problem but is it really safe (in terms of coding) to do this?
@gwmccubbin Please help us out.

Commenting out those lines was a workaround to build but the actual solution is to transfer tokens from the account creator to the DappTokenSale.address as I mentioned on this answer on stackexchange.