CRYPTO DEV SIGNER

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.

TECHNICAL OVERVIEW

keystore

• Keystore: Interface definition

transaction

• Transaction: Interface definition.

signer

• Signer: Interface definition. Its signTransaction method expects an object implementing the Transaction interface.