An implementation of Bitcoin using only Solidity (and Yul).
Why not? The fact that I can do it is pretty cool.
It's almost a direct implementation of the Bitcoin protocol.
It includes a node that verifies transactions and mines blocks, a wallet that can sign and send transactions and a lot of libraries to help with the implementation, such as the serialization library, the signature library, Base58 and Bech32, etc. The node supports P2PK, P2PKH, P2SH, P2WPKH and P2WSH scripts.
There are some differences either because of the limitations of Solidity or I was too lazy.
The main differences are:
- The node verifies transactions created only with `SIGHASH_ALL`.
- Bad script reverts everything.
- Only Segwit version 0 is supported.
- Only compressed public keys are used in the wallet.
- OP_CODESEPARATOR not supported so some P2WSH transactions won't work.
- Not all opcodes are supported.
- No networking between nodes.
All contracts are held within the src folder. All the tests are held within the test folder.
For more info check DOCS.
There is not much of a usage, but you can find real life examples in the test folder.
This project was made with help from the following sources: