Very basic Blockchain library implementing approaches used by Bitcoin blockchain (see https://bitcoin.org/en/developer-guide#block-chain). The Blockchain offers and basic implementation to create basic Transactions, add them to Blocks and create a whole BlockChain offering validation of tampering and data integrity.

To keep the record of the Transactions inside a block, basic Merkle Tree data structures has been used (see https://bitcoin.org/en/glossary/merkle-tree)

Different basic algorithms for Mining are provided. Also, take into account that parameters for these algorithms should be adjusted for a Mobile device, as they can lead to a big CPU and battery consumption. Use Dagger injection to provide different implementations of mining algorithms.

Basic Elliptic curve algorithms has been used in order to generate Key-Pair values to provide Wallets, it is possible to replace or improve them as needed.

• Android (Kotlin and some Java)
• JUnit, Mockito and PowerMock for testing purposes.
• Dagger 2 to perform dependency injection
• BouncyCastle to provide implementations of the ECDSA (Elliptic Curve Digital Signature Algorithm)