firmware/docs/miniscript.md

Miniscript

COLDCARD^® Mk4 experimental EDGE versions support Miniscript and MiniTapscript.

Import/Export

• Settings -> Miniscript -> Import from file
• only descriptors allowed for import
• Settings -> Miniscript -> <name> -> Descriptors
• only descriptors are exported
• export extended keys to participate in miniscript:
  • Advanced/Tools -> Export Wallet -> Generic JSON
  • Settings -> Multisig Wallets -> Export XPUB

Address Explorer

Same as with basic multisig. After miniscript wallet is imported, item with <name> is added to Address Explorer menu.

Limitations

• no duplicate keys in miniscript (at least account in origin derivation has to be different)
• subderivation must be <0;1>/* (may be omitted during the import - is implied)
• only keys with key origin info [xfp/p/a/t/h]xpub
• maximum number of keys allowed in segwit v0 miniscript is 20
• check MiniTapscript limitations in docs/taproot.md