Add SafeERC20 helpers #413
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spalladino
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Add SafeERC20 helpers
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Adds a library of wrappers around the ERC20 operations that can fail by returning a
bool. The wrappers allow one to perform these operations safely without needing to check the return value, since the library takes care of it.To use it, developers can add a
using SafeERC20 for ERC20;statement in their contracts. Then the functions will be available as methods of any ERC20 contract liketoken.safeTransfer(...), etcetera.