feat: add BIP-85 child mnemonic derivation - #22
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Remove QTUM, BNB, ZIL, GTO, IOST, CMT, MCO, and ODEM from tokens.def. These tokens were listed as ERC-20 entries in the legacy coin table but their contract addresses no longer exist in the generated uniswap_tokens table (they migrated to their own L1 chains or were delisted). This causes Coins.TableSanity unit test to fail because tokenByTicker() finds them in coins[] but tokenByChainAddress() cannot locate them in tokens[], returning UnknownToken. The native chain entries for QTUM, BNB, etc. in coins.def are unaffected (they have has_contract_address=false). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
4-stage fail-fast pipeline: gate (lint, secrets, submodules) → build (emulator + ARM cross-compile) → test (unit + Python integration) → publish (manual DockerHub push). Downloadable firmware artifacts with version-tagged naming. CircleCI config removed.
Remove unused variant builds (salt, fox, kaspersky, blockpit, dash) that compiled on every build but are no longer shipped. Add KK_BITCOIN_ONLY cmake option to produce a BTC-only firmware with altcoin sources and crypto excluded. Add parallel CI job for BTC-only ARM cross-compilation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Remove dead white-label variants, add BTC-only build
Derive child mnemonics from the device's master seed using BIP-85: m/83696968'/39'/0'/word_count'/index' - Supports 12, 18, and 24-word derived mnemonics - HMAC-SHA512 key derivation with BIP-39 entropy conversion - On-device confirmation before revealing derived mnemonic - Message types: GetBip85Mnemonic (120), Bip85Mnemonic (121) - device-protocol submodule → fork/develop (all v7.14.0 protos)
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Summary
m/83696968'/39'/0'/word_count'/index'Dependencies
Test plan