PoolERC20

PoolERC20
This is an abstract contract for a Pool ERC20 token to use with a proxy. It is inspired by OpenZeppelin ERC20.
_balances
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mapping(address => uint256) _balances
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_allowances
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mapping(address => mapping(address => uint256)) _allowances
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_totalSupply
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uint256 _totalSupply
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_name
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string _name
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_symbol
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string _symbol
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name
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function name() public view virtual returns (string)
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Returns the name of the token.
symbol
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function symbol() public view virtual returns (string)
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Returns the symbol of the token, usually a shorter version of the name.
decimals
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function decimals() public view virtual returns (uint8)
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Returns the decimals of the token. default to 18
totalSupply
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function totalSupply() public view virtual returns (uint256)
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Returns total supply of the token.
balanceOf
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function balanceOf(address account) public view virtual returns (uint256)
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Returns the amount of tokens owned by account.
transfer
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function transfer(address recipient, uint256 amount) public virtual returns (bool)
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_See {IERC20-transfer}.
Requirements:
recipient cannot be the zero address.
the caller must have a balance of at least amount._
allowance
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function allowance(address owner, address spender) public view virtual returns (uint256)
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See {IERC20-allowance}.
approve
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function approve(address spender, uint256 amount) public virtual returns (bool)
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_See {IERC20-approve}.
Requirements:
spender cannot be the zero address._
transferFrom
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function transferFrom(address sender, address recipient, uint256 amount) public virtual returns (bool)
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_See {IERC20-transferFrom}.
Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}.
Requirements:
sender and recipient cannot be the zero address.
sender must have a balance of at least amount.
the caller must have allowance for sender's tokens of at least amount._