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upstream #385: BIP-85 child mnemonic derivation + Lynx coin#65

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BitHighlander merged 1 commit intodevelopfrom
upstream/bip85-lynx
Mar 18, 2026
Merged

upstream #385: BIP-85 child mnemonic derivation + Lynx coin#65
BitHighlander merged 1 commit intodevelopfrom
upstream/bip85-lynx

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Summary

Cherry-pick of upstream keepkey#385

BIP-85 mnemonic derivation support + Lynx coin addition.

Test plan

  • CI green

Add Lynx cryptocurrency support to the firmware coins table.

Parameters sourced from Lynx Core (Bitcoin v26 fork with PoS):
- SLIP-44 coin type: 191 (0x800000BF)
- Address type: 45 (pubkey hash), 22 (script hash)
- SegWit enabled with bech32 prefix "lynx"
- Taproot enabled
- Standard Bitcoin xpub/ypub/zpub magic numbers
- Signed message header: "Bitcoin Signed Message:\n" (matches upstream)
- 8 decimal places, secp256k1 curve
@BitHighlander BitHighlander merged commit aac7422 into develop Mar 18, 2026
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