I have an ERC20 Mintable+Burnable Token created on solidity 6.11 and a sale contract on solidity 5.0 I am getting error when i send ETH to the sale contract. [image] Rinkeby Transaction Hash (Txhash) Details | Etherscan Rinkeby (ETH) detailed transaction info for txhash 0xb793a7b7f3d5667a…

ok I solved it i guess. Used the mintable token on Solidity version 0.5 and it works as expected.

Hi @Farhan_W , Please see the documentation on calculating rate: [image] Crowdsales - OpenZeppelin Docs If you want to issue someone “1 TKNfor every 1 ETH”, and your decimals are 18, your rate is 1 . You can post your contract and token on the forum.

Yes i read the docs prior to making contract. Read it multiple times when testing the contract. i have tried with multiple rates. Tried with 1:1 as a rate. Still transaction won’t go through. Is the code i am using correct? or am i missing something. I have also tried using an AllowanceCrowdsale con…

Hi @Farhan_W , I thought the ERC20 from OpenZeppelin Contracts v3.x would have worked too. I didn’t see anything obvious in your code.

Rate to use for Crowdsale?

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Rate to use for Crowdsale?

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