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What is ERC20 interface?

Interface of the ERC20 standard as defined in the EIP. Does not include the optional functions; to access them see ERC20Detailed. Returns the amount of tokens in existence. Returns the amount of tokens owned by account. Moves amount tokens from the caller’s account to recipient.

What does erc20mintable do?

Useful if you want to stop trades until the end of a crowdsale, or have an emergency switch for freezing all token transfers in the event of a large bug. Extension of ERC20Mintable that adds a cap to the supply of tokens. Sets the value of the cap. This value is immutable, it can only be set once during construction.

What is emitted in ierc20?

Emitted when the allowance of a spender for an owner is set by a call to approve. value is the new allowance. Implementation of the IERC20 interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using _mint. For a generic mechanism see ERC20Mintable.

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