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BLXToken.md

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Objective

Create ERC20 token contract with BLX symbol, Bloxify Token name, and 18 decimals. Make sure to cover all User Stories below and test them.

User stories

Please, read the following user stories to implement:

  1. As a user I want to get meta-information about the token - name, symbol, total supply, and decimals
    • methods: name(), symbol(), totalSupply(), decimals()
  2. As a user I want to get information about the balance of a given address
    • method: balanceOf(address)
  3. As a user I want to be able to mint any number of tokens for myself
    • method: mint(uint256)
  4. As a user I want to be able to transfer any number of currently owned tokens to any address
    • method: transfer(address, uint256)
  5. As a user I want to be able to approve any other address to use the given number of my tokens
    • method: approve(address, uint256)
  6. As a user I want to get information about the allowed number of tokens of one address that can be used by another address
    • method: allowance(address, address)
  7. As a user that is approved to use other's tokens, I want to be able to transfer the allowed number of tokens from the owner to any other address
    • method: transferFrom(address, address, uint256)

Additional rules

  • User can not mint tokens for others
  • User can not transfer other's tokens without allowance
  • Any change of the contract state (balances, allowances, supply) should be fallowed by emited Events
    • eg. Transfer(address, uint256), Mint(address, uint256), Approve(address, address, uint256)
  • Meta-information should be set in the constructor.
  • Token contract should implement IERC20 interface