Each weekday leading up to devcon2, Nexus will highlight a dapp, library, or package (something with a dappfile) as a promotion of our toolchain and as case studies for other developers. Previous Post
Today's dapp contains a base class containing utility internal helper methods and modifiers that are general enough to be worth putting in just about every contract.
https://github.com/nexusdev/ds-base
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Nexus Development
nexusdev@github
It ships with two variants because Solidity currently does not allow overriding fallback functions.