Been working on Satoshi Signer — an Android app that signs Bitcoin transactions with a Trezor over USB-C. No desktop needed for signing.
Make your unsigned tx in Electrum, send the PSBT to your phone over Nostr (NIP-04 encrypted, one click with the included Electrum plugin), plug in the Trezor, sign, broadcast.
Store your passphrase on NFC tag encrypted.
#bitcoin #trezor #psbt #nostr #android #electrum
GitHub
GitHub - welldone-tech/satoshi-signer: An Android app that imports unsigned Bitcoin PSBTs (Partially Signed Bitcoin Transactions) — via file picker, Nostr relay, or clipboard — signs them with a Trezor hardware wallet connected via USB-C (with passphrase entry on-device, on-phone, or via NFC tag), and broadcasts the signed transaction to the Bitcoin network.
An Android app that imports unsigned Bitcoin PSBTs (Partially Signed Bitcoin Transactions) — via file picker, Nostr relay, or clipboard — signs...