This repo contains the optimized WASM files of the compiled Parity Substrate ink! smart contract examples found in https://github.com/paritytech/ink/tree/master/examples/lang together with their contract ABI's in a .json file. These files can and should only be used as test-files for debugging.
Since there are no official releases of ink! and it is not being published to crates.io yet, the folders are marked by dateOfCompilation_InkGitHubCommit eg 20190625_9589899.
Parity ink! is still heavily work in progress so these contracts should only be used for testing and experimenting and to get a first impression on how smart contracts work on Substrate.
To get more insights, please have a look at our docs: https://substrate.dev/docs/en/contracts/
or follow the online Substrate Contract Workshop.