HD Wallet

A generic HD wallet for Elliptic Curves (Secp256k1/Secp256r1) and Edwards-curve (Ed25519) based crypto currencies.

Supported blockchains

• Avalanche
• Bitcoin
• Cardano
• Ethereum
• FileCoin
• Neo3
• Polkadot
• Solana
• Stacks
• Terra
• Tezos
• Tron
• Bitcoin-like (Litecoin, Dash, Doge, ...) (WIP)

HD wallets can be generated from mnemonic (w/ or w/o passphrase) or from extended private key (xprv) and non-hd wallets can be generated directly from private key.

HD wallets can derive sub accounts, and from that accounts external (deposit) wallets or internal (change) wallets can be derived. Using generated wallets, addresses can be retrived by implementing address generators for related crypto currency.

SDK (.Net Core)

An SDK for wallet creation in a hierarchical and deterministic way. From one mnemonic, multiple wallets can be created for multiple blockchains. You don't need to store private keys for multiple crypto addresses. They can be re-created deterministically. .Net developers can use this SDK to create HD wallet within their programs. This SDK doesn't store secrets or manage wallet. Mnemonic (or seed/private key) need to be given for wallet creation.
Also regular wallet can be created from private keys.

SDK for new blockchains (.Net Core)

By using HDWallet.Secp256k1 project, any Elliptic Curve (Secp256k1) based crypto currency wallet can be generated by defining the purpose (e.g. BIP44) and the coin type (e.g. 195 for Tron).
HDWallet.Tron project is already ready to go HD wallet for Tron (TRX) which uses HDWallet.Secp256k1 project.

By using HDWallet.Ed25519 project, any Edwards-curve (Ed25519) based crypto currency wallet can be generated by defining purpose (e.g. BIP44) and coin type (e.g. 1852 for Cardano).

API

An API can be hosted as Docker container or run as .Net Core app and will receive requests for address generation. Generated addresses (or private keys) won't be stored and will be re-generated when ever queried.

Sign server (WIP)

If activated within config, a sign server with receive messages to be signed and in reponse, signature and public key that signed the message will be returned.

How To

How to use the SDK

Sample for generating an HD Wallet for Bitcoin (purpose: BIP84, coin type: 0) from mnemonic and getting the first account's first deposit wallet;

IHDWallet<BitcoinWallet> bitcoinHDWallet = new BitcoinHDWallet("conduct stadium ask orange vast impose depend assume income sail chunk tomorrow life grape dutch", "");
var depositWallet0 = bitcoinHDWallet.GetAccount(0).GetExternalWallet(0);        
var address = depositWallet0.Address;

Sample for generating HD Wallet (m/44'/0'/0') from extended private key;

var accountExtendedPrivateKey = "xprv9xyvwx1jBEBKwjZtXYogBwDyfXTyTa3Af6urV2dU843CyBxLu9J5GLQL4vMWvaW4q3skqAtarUvdGmBoWQZnU2RBLnmJdCM4FnbMa72xWNy";
IAccount<BitcoinWallet> accountWallet = new Account<BitcoinWallet>(accountExtendedPrivateKey);

var depositWallet0 = accountWallet.GetExternalWallet(0);

How to use the API

For multiple accounts

curl 'https://localhost:5001/bitcoin/0/external/0' 
curl 'https://localhost:5001/bitcoin/0/external/1'
curl 'https://localhost:5001/bitcoin/0/internal/0'
curl 'https://localhost:5001/bitcoin/0/internal/1'

For single account

curl 'https://localhost:5001/bitcoin/account/external/0'
curl 'https://localhost:5001/bitcoin/account/internal/0'

Signing (WIP)

curl -X POST 'https://localhost:8080/api/v1/tron/account/0/address/0/sign' --header 'Content-Type: application/json' --data-raw '{
    "message":"MESSAGE-TO-SIGN"
}'

{
  "signature" : "[SIGNATURE]",
  "publickey" : "[PUBLICKEY]"
}

How to Run

With Docker [WIP]

➜  ~ docker run -e mnemonic="conduct stadium ask orange vast impose depend assume income sail chunk tomorrow life grape dutch" -e passphrase=P@55PHR@S3 -p 8080:80 hdwallet-api 

➜  ~ docker run -e accounthdkey=xprv9xyvwx1jBEBKwjZtXYogBwDyfXTyTa3Af6urV2dU843CyBxLu9J5GLQL4vMWvaW4q3skqAtarUvdGmBoWQZnU2RBLnmJdCM4FnbMa72xWNy -p 8080:80 hdwallet-api 

From terminal

➜  ~ dotnet hdwallet-api.dll

Authentication

Cookie based [WIP]
Cookie based authentication activated by default. As the application starts, a cookie file created at ~/.hdwallet/.cookie (can be configured w/ --cookiefile flag). Api user can authenticate with Basic Authentication using credentials in cookie file.

If one wants to activate sign server feature, a flag is needed as --signserver

Configuration

from appSettings.json

{
  "mnemonic" : "conduct stadium ask orange vast impose depend assume income sail chunk tomorrow life grape dutch",
  "passphrase" : "P@55PHR@S3"
}

{
  "accounthdkey" : "xprv9xyvwx1jBEBKwjZtXYogBwDyfXTyTa3Af6urV2dU843CyBxLu9J5GLQL4vMWvaW4q3skqAtarUvdGmBoWQZnU2RBLnmJdCM4FnbMa72xWNy"
}

from Environment

➜  ~ export MNEMONIC="conduct stadium ask orange vast impose depend assume income sail chunk tomorrow life grape dutch"
➜  ~ export PASSPHRASE=P@55PHR@S3
➜  ~ export ACCOUNTHDKEY=xprv9xyvwx1jBEBKwjZtXYogBwDyfXTyTa3Af6urV2dU843CyBxLu9J5GLQL4vMWvaW4q3skqAtarUvdGmBoWQZnU2RBLnmJdCM4FnbMa72xWNy

➜  ~ dotnet hdwallet-api.dll

from parameters

➜  ~ dotnet hdwallet-api.dll --mnemonic "conduct stadium ask orange vast impose depend assume income sail chunk tomorrow life grape dutch" --passphrase P@55PHR@S3

➜  ~ dotnet hdwallet-api.dll --accounthdkey xprv9xyvwx1jBEBKwjZtXYogBwDyfXTyTa3Af6urV2dU843CyBxLu9J5GLQL4vMWvaW4q3skqAtarUvdGmBoWQZnU2RBLnmJdCM4FnbMa72xWNy

Sample for signing messages with generated wallets;

...
var signature = depositWallet0.Sign(messageBytes);

Build the api

docker build -f src/HDWallet.Api/Dockerfile -t hdwallet-api .