[konstantinullrich]

Replaces: #1615

Description

Adds Bitcoin Cash support for Ledger hardware wallets.

Pull Request - Checklist

• Initial Manual Tests Passed
• Double check modified code and verify it with the feature/task requirements
• Format code
• Look for code duplication
• Clear naming for variables and methods
• Manual tests in accessibility mode (TalkBack on Android) passed

---

Note

High Risk
Introduces hardware-backed signing and derivation paths for a new asset class; mistakes could affect funds or signatures, though the design mirrors existing BTC/LTC Ledger integration.

Overview
Adds Ledger support for Bitcoin Cash, including restore-from-hardware, on-device transaction signing, and message signing, wired through the same Ledger flows used for Bitcoin and Litecoin.

Bitcoin Cash: New BitcoinCashLedgerService (account discovery on m/44'/145'/…', BCH-specific signing via LitecoinLedgerApp with cashaddr / bip143). The BCH wallet accepts optional xpub instead of a mnemonic, implements buildHardwareWalletTransaction, and routes signMessage to the hardware service when applicable. BitcoinCashWalletService.restoreFromHardwareWallet is implemented (replacing the previous stub) using shared BitcoinRestoreWalletFromHardware credentials.

App wiring: Ledger is marked supported for WalletType.bitcoinCash; ledger and hardware-restore view models initialize BCH wallets and return BitcoinCashLedgerService for BCH.

Related fixes: ElectrumWallet._accountDerivationPathForRecord uses the stored hardware derivation path when present. Litecoin Ledger gains signMessage, with matching hardware branching in LitecoinWallet.signMessage. Ledger Flutter plugin refs are bumped in overrides (including message-sign support).

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[github-actions]

changes in dependencies

changed git refs:
  ledger_bitcoin
    url   https://github.com/cake-tech/ledger-flutter-plus-plugins -> https://github.com/cake-tech/ledger-flutter-plus-plugins
    ref   75bba8632c529debf30ee2b1858530009fa6440b -> bd86993c6c41085f9b2aa0b723f734bc4f6bf508
    path  ./packages/ledger-bitcoin -> ./packages/ledger-bitcoin
  ledger_ethereum
    url   https://github.com/cake-tech/ledger-flutter-plus-plugins -> https://github.com/cake-tech/ledger-flutter-plus-plugins
    ref   f4761cd5171d4c1e2e42fd3298261650539fb2db -> bd86993c6c41085f9b2aa0b723f734bc4f6bf508
    path  ./packages/ledger-ethereum -> ./packages/ledger-ethereum
  ledger_litecoin
    url   https://github.com/cake-tech/ledger-flutter-plus-plugins -> https://github.com/cake-tech/ledger-flutter-plus-plugins
    ref   75bba8632c529debf30ee2b1858530009fa6440b -> bd86993c6c41085f9b2aa0b723f734bc4f6bf508
    path  ./packages/ledger-litecoin -> ./packages/ledger-litecoin
     .../lib/src/ledger_litecoin_application.dart       |  4 +-
     .../operations/litecoin_sign_msg_operation.dart    | 98 +++++++---------------
     .../lib/src/tx_utils/create_transaction.dart       |  6 +-
     .../lib/src/utils/message_signature.dart           | 30 +++++++
     4 files changed, 67 insertions(+), 71 deletions(-)

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Stale Bugbot comment from a previous run.

[cursor]

Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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[cursor]

BCH sign lookup now throws

Medium Severity

signMessage now calls firstWhere with no fallback, and the old try/catch is gone. The Sign page always passes the address field for Bitcoin Cash, so an empty or differently formatted address (for example cashaddr without the bitcoincash: prefix) throws Bad state: No element instead of signing. That also blocks the new hardware path from using its index-0 default.

 

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