Bitcoin Hardware Wallet Interface ~ Andrew Chow, Nopara, Stepan Snigirev, NVK
World Crypto Network
Bitcoin Core's HWI and PSBT (designed by Andrew Chow) standardize hardware wallet communication, replacing proprietary vendor protocols. PSBT enables air-gapped multisig signing workflows; HWI provides unified Python interface to Trezor, Ledger, Coldcard without bloating Core's codebase with vendor-specific dependencies. Bitcoin Core integration (v0.19-0.20) ties to wallet refactoring using output

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