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element-x-ada/docs/build-logs/ssss-build-result.md

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SSSS Wallet Backup Build Result

Date: 2026-03-28 17:30

Commits

matrix-rust-sdk (gitea: kayos/matrix-rust-sdk-ada)

Branch: sulkta/send-raw-v1 Commit: 2dc91ef4ea1e50b2b91512571eaaf8f9c3a40c1c

element-x-android (gitea: Sulkta-Coop/element-x-ada)

Branch: phase1-dev Commits:

  • 0388cd7d06 - feat(wallet): add SSSS backup for wallet seed phrase
  • 1308a8299a - feat(wallet): implement import wallet from mnemonic

What Was Built

Phase 1: Rust SDK FFI

  • Created bindings/matrix-sdk-ffi/src/secret_storage.rs — SecretStoreWrapper with put_secret/get_secret
  • Modified bindings/matrix-sdk-ffi/src/client.rs — added open_secret_store() method
  • Modified bindings/matrix-sdk-ffi/src/lib.rs — module export
  • Modified bindings/matrix-sdk-ffi/src/error.rs — From impl

Phase 2: Kotlin SDK Wrappers

  • Created libraries/matrix/api/.../secretstorage/SecretStorage.kt — interfaces
  • Created libraries/matrix/impl/.../secretstorage/RustSecretStorage.kt — implementations
  • Modified MatrixClient.kt — added secretStorage property
  • Modified RustMatrixClient.kt — implemented secretStorage
  • Fixed SDK compatibility issues (Sentry config removed from TracingService)

Phase 3: Wallet Backup Feature

  • Created features/wallet/api/.../backup/WalletBackupService.kt — interface
  • Created features/wallet/impl/.../backup/WalletBackupServiceImpl.kt — implementation
  • Modified WalletSetupState.kt — added BACKUP_TO_MATRIX step
  • Modified WalletSetupPresenter.kt — added recovery key handling
  • Modified WalletSetupView.kt — added Matrix backup UI with FLAG_SECURE

Phase 3b: Import Wallet from Mnemonic

  • Added IMPORT_MNEMONIC step to wallet setup flow
  • Live word count display (12/24 words)
  • BIP39 mnemonic validation via cardano-client-lib
  • FLAG_SECURE on import screen
  • Paste-friendly single text area input
  • Clear button and inline error messages

APK

Available at: http://192.168.0.5:8888/element-x-ada-fdroid.apk

Deviations from Plan

  1. SDK Breaking Changes: The updated SDK removed Sentry configuration from TracingConfiguration. Fixed by making sentryConfig a no-op in RustTracingService and RustAnalyticsSdkManager.

  2. Settings Button: Not implemented in this build. The backup-on-setup flow is complete; settings integration can be added separately.

  3. Restore on Login: Not implemented. This would require changes to the login flow. Current implementation allows backup during wallet setup.

Secret Name

com.sulkta.cardano.wallet_seed

Build Environment

  • Rust SDK built with Docker mingc/android-build-box:latest
  • Targets: aarch64-linux-android, x86_64-linux-android
  • AAR placed at: libraries/rustsdk/matrix-rust-sdk.aar
  • Build target directory: /mnt/cache_nvme/rust-build (symlinked from /tmp/matrix-rust-sdk/target due to disk space)