SoB/BDKWallet: BDK Wallet Infrastructure project approach.

[15IITian]

Here is the approach for working on this project idea #122 ->

Task List:

• SoB/BDKWallet: Remove DisplayAddressType struct and its impl #157

  • It is not used anywhere

• SoB/BDKWallet: Segregate whole wallet related code into two BDK_Wallet & SwapCoin #156

  • create bdk.rs module containing all wallet module code for working on BDK project.

• SoB/BDKWallet: Add Fidelity, SwapCoin variants to KeychainKind enum #155

  • Fidelity = 2 ( FIDELITY_DERIVATION_PATH: &str = m/84'/0'/0'/2)
  • SwapCoin = 3

• SoB/BDKWallet: Modify WalletStore struct and implement certain more traits #154

  • Remove master_key field from struct -> can raise security issues
  • move wallet_file_path field here from Wallet ( as it is more related to backend portion)
  • Implement PersistentBackend trait:
    • This would allow changes to be staged and finalized selectively on further considerations which will enhance data integrity.

• Use the KeyChainTxOutIndex struct from BDK

  • apply logic to support swapcoin keychainkind

• SoB/BDKWallet: Modify Wallet Struct #163

  • remove rpc & store field
  • move wallet_file_path field from this struct to WalletStore ( as it is more related to backend portion)
  • Add all fields same as BDK wallet one with some tweaks:
    • Use HashMap to relate each Arc<SignersContainer> to its corresponding KeychainKind instead of having seperate field for each keychainkind as done in BDK wallet as ( signers= HashMap<KeychainKind, Arc<SignersContainer>> )

• SoB/BDKWallet: Reconstruct init wallet function #179

  • coinswap wallet will act as like regular one -> will take only internal & external discriptors

• SoB/BDKWallet: Explore on BDK signers (make it compatible for Swapcoin kind.) #173

  • build create_signers fn
  • build add_signers which will add an external signer to a particular keychain

• SoB/BDKWallet: Rebuild load wallet function #180

• modify create_and_import_coinswap_address api

• SoB/BDK: RPC Sync Support in the new wallet #201

  • use logic of Sync variant command of RpcCommands enum in example_bitcoind_rpc_polling example given in BDK

• SoB/BDK: Modularize the bdk module code #203

[15IITian]

Points about CoinSwap wallet:

• This wallet has all the general-purpose features of regular wallets like BDK wallets, but it is also compatible with the CoinSwap protocol.

• Upon initializing the wallet, we can't judge if it will be used for CoinSwap ; it can also function as a regular wallet. However, the main objective of creating this wallet is to support CoinSwap in addition to regular features.

[15IITian]

For now, I haven't considered the idea of not using a descriptor for Coinswap, as discussed in the previous dev sync. I believe it needs more discussion.