jellyfish-wallet-encrypted hd_node.ts implementation

[fuxingloh]

What kind of PR is this?:

/kind feature

What this PR does / why we need it:

• jellyfish-wallet not to use 44'/${COIN_TYPE}'/${account}'/0/0 for non-hardened path derivation to allow encrypted wallet implementations to access public key without requiring private key
  • updated to ${account}/0/0
• extended bip32.test.ts for better encrypted and mnemonic testing
• fixed scrypt re-requiring hash when it's already encoded in EncryptedData

EncryptedMnemonicHdNode extends MnemonicHdNode with overrides to deriveNode to use promise-based derivation technique to allow privateKey to be decrypted.

export class EncryptedMnemonicHdNode extends MnemonicHdNode {
  constructor (
    path: string,
    chainCode: Buffer,
    options: Bip32Options,
    private readonly rootPubKey: Buffer,
    private readonly promisePrivKey: () => Promise<Buffer>
  ) {
  }
}

EncryptedHdNodeProvider comes with wordsToEncryptedData to encrypt a mnemonic words into encrypted format to use within EncryptedHdNodeProvider. The encrypted version is the hot implementation, where the mnemonic is the cold implementation.

export class EncryptedHdNodeProvider implements WalletHdNodeProvider<EncryptedMnemonicHdNode> {
  /**
   * @param {string[]} words to convert into EncryptedProviderData
   * @param {Bip32Options} options
   * @param {string} scrypt to encrypt mnemonic words
   * @param {string} passphrase to encrypt mnemonic words with
   * @return EncryptedProviderData with unencrypted "pubKey & chainCode" and scrypt encoded 'encryptedPrivKey'
   */
  static wordsToEncryptedData (words: string[], options: Bip32Options, scrypt: Scrypt, passphrase: string): EncryptedProviderData
}

You can initialize EncryptedHdNodeProvider with EncryptedProviderData , Scrypt and PromptPassphrase for prompting password.

export class EncryptedHdNodeProvider implements WalletHdNodeProvider<EncryptedMnemonicHdNode> {
  /**
   * @param {EncryptedProviderData} data with unencrypted "pubKey & chainCode" and scrypt encoded 'encryptedPrivKey'
   * @param {Bip32Options} options
   * @param {string} scrypt to decrypt encrypted private key
   * @param {PromptPassphrase} promptPassphrase for on-demand request passphrase to decrypt encrypted private key
   * @return EncryptedHdNodeProvider
   */
  static init (data: EncryptedProviderData, options: Bip32Options, scrypt: Scrypt, promptPassphrase: PromptPassphrase): EncryptedHdNodeProvider
}

Which issue(s) does this PR fixes?:

Fixes #344
Fixes #133

[qlty-cloud-legacy]

Code Climate has analyzed commit c11a0ad and detected 0 issues on this pull request.

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
packages/jellyfish/dist/index.umd.js	21.34 KB (0%)	427 ms (0%)	175 ms (+2.13% 🔺)	602 ms

[codecov]

Codecov Report

Merging #480 (c11a0ad) into main (4d353f6) will increase coverage by 0.02%.
The diff coverage is 97.36%.

@@            Coverage Diff             @@
##             main     #480      +/-   ##
==========================================
+ Coverage   97.28%   97.31%   +0.02%     
==========================================
  Files         104      105       +1     
  Lines        3019     3052      +33     
  Branches      378      378              
==========================================
+ Hits         2937     2970      +33     
  Misses         82       82              

Impacted Files	Coverage Δ
packages/jellyfish-wallet/src/wallet_account.ts	100.00% <ø> (ø)
packages/jellyfish-wallet-encrypted/src/scrypt.ts	93.65% <66.66%> (ø)
packages/jellyfish-wallet-encrypted/src/hd_node.ts	100.00% <100.00%> (ø)
packages/jellyfish-wallet-encrypted/src/index.ts	100.00% <100.00%> (ø)
packages/jellyfish-wallet/src/wallet.ts	100.00% <100.00%> (ø)

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