Summary

Adds a small helper to @bitgo-beta/statics:

getTokenFeatures(
  family: string,
  additionalFeatures: CoinFeature[] = [],
  excludedFeatures: CoinFeature[] = [],
): CoinFeature[]

Resolves the final feature list for a token — family default features (via the existing getNetworkFeatures lookup) plus additionalFeatures, minus excludedFeatures.

Consumed by the generated build/botTokens.ts once the AMS bot token generator is switched to call AMS with features=false (AMS already returns the per-token add/excl diff in that mode — see replaceWithFeatureDiffs in AMS). Keeps the generated file a single getTokenFeatures(...) call per token instead of inline new Set / .filter expressions in the constructor args.

Linear: CSHLD-935

Test plan

• getTokenFeatures('eth') returns the same array as networkFeatureMapForTokens['eth'].
• getTokenFeatures('eth', [CoinFeature.X]) includes X (deduped against family defaults).
• getTokenFeatures('eth', [], [CoinFeature.Y]) removes Y from the family defaults.
• getTokenFeatures('unknown-family') returns [] (no throw).
• Statics package builds cleanly: `yarn workspace @bitgo-beta/statics build`.

Follow-up

• AMS PR will switch scripts/generate-botTokens.ts to features=false and emit getTokenFeatures(...) calls in build/botTokens.ts. It depends on this one shipping first so the import resolves.

🤖 Generated with Claude Code