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21 lines
1.0 KiB
21 lines
1.0 KiB
2 years ago
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# Basic Swap
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We will create a basic swap smart contract that will allow two users, Alice and Bob, to exchange two minimal tokens safely. The contracts will be specific to the two users and unidirectional.
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### Instructions
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- Create a `usableToken` contract as defined before
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- Create a Smart Contract `BasicSwap` with a constructor that takes the address of two Externally Owned Accounts.
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- Create a function `swap(tokenA, AmountA, TokenB, AmountB)` that takes as parameters, two `MinimalTokenAllowance`contracts and amounts
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- The function checks that users gave the corresponding allowances to the smart contract
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- The function proceed to transfert the first amount in TokenA from Alice to Bob and the second amount from Bob to Alice
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To test your smart contract, you will need to deploy two instances of `MinimalTokenAllowance`
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### Resources
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- [solidity docs](https://docs.soliditylang.org/)
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- [learn X in Y](https://learnxinyminutes.com/docs/solidity/)
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- [Remix IDE](https://remix.ethereum.org)
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- [hardhat](https://hardhat.org)
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