This package is written because at the time no good solution seemed to exist for solving the following combined requirements and issues:
- A service has custody of its users' private keys.
- The are a large number of private keys involved (hundreds of thousands and up).
- Need to sign transactions conforming to EIP-155, with the ability to arbitrarily specify the "chain id".
- Do not want to store the keys inside an ethereum node, especially not the one connected to the network.
- Want to use the "standard" web3 JSON-RPC interface, so that the component can be easily replaced later.
- Multiple providers don't work on either web3.js and/or web3.py.
- As a bonus, provide a practical keystore solution for testing in general for web3 projects.
- Keystore: Interface definition
- Transaction: Interface definition.
- Signer: Interface definition. Its
signTransactionmethod expects an object implementing theTransactioninterface.