Link: https://github.com/Coding-Enthusiast/FinderOuter
The FinderOuter is a bitcoin recovery tool that focuses on making the recovery process easy for everyone.
There is no need to read long guide pages to learn how to use the application. Instead it will always be as easy as filling some boxes, maybe selecting some options and clicking a button all in a user-friendly GUI.
Each recovery option is written from scratch and all parts down to the basic cryptography used (such as SHA, ECC,...) are specialized for maximum efficiency.
Available options
1. Message signature verification
User can enter a message signature here to verify it. In case there is a problem with the message (except being an actually invalid signature), the code can search to find the common issues that some signing tools have and fix them.
2. Missing Base-58 characters
This option helps recover any base-58 encoded string with a checksum that is missing some characters. For example a damaged paper wallet where some characters are erased/unreadable. The position of missing characters must be known.
It works for (1) WIFs (Base-58 encoded private key) (2) Addresses (Base-58 encoded P2PKH address) (3) BIP-38 (Base-58 encoded encrypted private key).
There is also a "special case" where a compressed private key is missing 3 characters at unknown positions.
3. Missing Base-16 characters
This option is similar to previous feature but works for base-16 (hexadecimal) private keys. It currently requires an address and only checks compressed public keys. Unlike the other options, this one is very slow since it depends on ECC and that is not yet optimized.
4. Missing mini-privatekey characters
This option is similar to 2 and 3 but works for mini-privatekeys (eg. SzavMBLoXU6kDrqtUVmffv). It requires an address to check each possible key against, as a result it is also slower since it depends on ECC and has 2 additional hashes.
5. Missing mnomonic (seed) words
This option works for BIP-39 mnemonics (others like Electrum will be added in the future) that have some words missing. It requires knowing one child key or address created from that seed and the exact path of it.
Future plans
- Optimization is always at the top of the to-do list
- BIP-32 path finder (user has master key and at least one child key but doesn't know the derivation path)
- Password recovery (user knows some parts of his password but not all and has the encrypted wallet file)
- Converting versioned WIFs to regular WIFs (BIP-178 and early vertion 3 Electrum wallets)
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