Tangem SDK & Libraries

In-house SDKs (via `tangem_dependencies.toml`)

Blockchain SDK (com.tangem:blockchain) — multichain SDK for working with blockchains: creating/signing transactions, fetching balances, managing addresses. Wrapped in libs/blockchain-sdk/
Card SDK (com.tangem.tangem-sdk-kotlin:core, :android) — SDK for interacting with physical Tangem cards via NFC: scanning, wallet creation, key derivation, passcode management, backup. Wrapped in libs/tangem-sdk-api/
Hot SDK (com.tangem.tangem-hot-sdk-kotlin:core, :android) — SDK for hot (software) wallets
Vico (com.tangem.vico) — forked charting library Vico, adapted for project needs

libs/blockchain-sdk/ — wrapper around Blockchain SDK, provides domain-level abstractions for blockchain operations
libs/tangem-sdk-api/ — wrapper around Card SDK, exposes NFC card interaction API to the app
libs/crypto/ — cryptographic utilities: derivation, address handling, blockchain-specific helpers
libs/auth/ — API key provider interfaces for external services (Express, StakeKit)
libs/visa/ — Visa integration: smart contracts, limits, balances via Web3j