Solidity : Implicit visibility level

Overview

The default function visibility level in contracts is public, in interfaces - external, state variable default visibility level is internal. In contracts, the fallback function can be external or public. In interfaces, all the functions should be declared as external. Explicitly define function visibility to prevent confusion.

References

Solidity: Visibility and Getters

LOW

Solidity : Implicit visibility level

Overview

References

DerScanner Severity Score

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See also

Solidity : Return value of transfer, transferFrom, or approve function of ERC-20 standard is always false.

Solidity : Using approve function of the ERC-20 token standard

Solidity : ERC-20 transfer should throw