KarpelesLab / libwallet / 24975362911

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wltacct: Account:addressFormats — multi-shape address picker

Today Account.Address holds one canonical receive form per chain
(BIP84 p2wpkh on bitcoin / litecoin / monacoin, p2pkh on
bitcoin-cash / dogecoin). Frontends had no way to render the same
account as Legacy / SegWit-wrapped / Native SegWit, even though
the backend's modchain_* indexing watches every key type and
incoming funds at any of those shapes land in the same balance.

New endpoint Account:addressFormats returns every receive shape
available for the resolved network, ordered by display preference
(modern first). Per-chain catalog lives next to bitcoinAddress()
so adding a new script type is one map entry. The first entry's
isDefault is true and matches whatever Account.Address shows, so
a frontend switching from Account.Address to the picker sees the
same primary address.

Per-chain coverage:
  bitcoin       Native SegWit (bc1)  / SegWit-wrapped (3)  / Legacy (1)
  litecoin      Native SegWit (ltc1) / SegWit-wrapped (M)  / Legacy (L)
  monacoin      Native SegWit (mona1) / Legacy (M)
  bitcoin-cash  CashAddr (bitcoincash:)
  dogecoin      Standard (D)

Dart binding accounts.addressFormats(id, network:) returns a
typed AddressFormatsResult with chainId + List<AddressFormat>.
Both classes exported from the top-level barrel.

Tests pin the catalog: every chain returns the expected kinds in
the expected order, addresses carry the chain-specific prefix,
and AddressFormats[0].address is byte-identical to what
bitcoinAddress() emits — so the default-flagged entry can never
silently drift from Account.Address.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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