blns Paper backup recovery tool

v0.1.0

This tool helps users recover blns paper backup to obtain root seed. It should be used only when blns card is lost or broken. After the recovery transfer all funds away to a new, safe address, then leave it and never use it again. The tool should be used offline on a fresh PC to minimize probability of a malware stealing it.

Enter your paper backup parts

example: enter part1: "balns1 road there connect clap divert nothing hunt angle slush lesson glide lunar vocal scrub bubble clean unique hammer charge wreck satoshi glare surge urge memory gather",
part2: "balns2 quit exchange miracle winter cupboard solve wing zero this leader auction result firm manage they total mimic stadium host borrow spray list canyon brick refuse april"

Obtained with the card

Shown by the blns app after card setup

Please note that this seed phrase is not directly usable for recovery, use hexcoded seed instead.
BIP44 BTC Address
(m/44'/0'/0'/0/0 Legacy Bitcoin Address)  
BIP49 BTC Address
(m/49'/0'/0'/0/0 Segwit Bitcoin Address)  
BIP84 BTC Address
(m/84'/0'/0'/0/0 Bech32 Bitcoin Address)

Derivation Path


For more info see the BIP44 spec.

The account extended keys can be used for importing to most BIP44 compatible wallets, such as mycelium or electrum.

Download Electrum wallet file

For more info see the BIP32 spec.

Use path m/0'/0' with hardened addresses.

For more info see the Bitcoin Core BIP32 implementation

Use path m/44'/0'/0'. Only enter the xpub extended key into block explorer search fields, never the xprv key.

Can be used with: blockchain.info


For more info see the BIP49 spec.

The account extended keys can be used for importing to most BIP49 compatible wallets.

Download Electrum wallet file

For more info see the BIP84 spec.

The account extended keys can be used for importing to most BIP84 compatible wallets.

Download Electrum wallet file

Derived Addresses

Note these addresses are derived from the BIP32 Extended Key

Path  
Address  
Public Key  
Private Key  
    
    
    
    
    
Show starting from index (leave blank to generate from next index)

Offline Usage

You can use this tool without having to be online.

In your browser, select file save-as, and save this page as a file.

Double-click that file to open it in a browser on any offline computer.

Alternatively, download the file from the repository - https://github.com/blns-ltd/blns-recovery

You can also use a python recovery tool - https://github.com/blns-ltd/blns-recovery-python

This project is 100% open-source code

Get the source code from the repository - https://github.com/blns-ltd/blns-recovery

The project is based on Ian Coleman's Bip39 project. Get Bip39's source code from the repository - https://github.com/iancoleman/bip39

Libraries

BitcoinJS - https://github.com/bitcoinjs/bitcoinjs-lib

jsBIP39 - https://github.com/iancoleman/jsbip39

sjcl - https://github.com/bitwiseshiftleft/sjcl

jQuery - https://jquery.com/

Twitter Bootstrap - http://getbootstrap.com/

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