[Fi-zzy]

Summary

• Derive the strategy engine asset union from the loan configuration universe: USDC, EURC, XLM, USDG, BTC, and ETH.
• Keep vault stablecoin constants unchanged and allow price feeds to provide the assets they actually price.
• Widen scenario pricing and portfolio report types, with XLM coverage in feeds, scenarios, and backtests.

This is a source-level TypeScript change that accepts more asset symbols; existing USDC/EURC behavior and vault deposit asset constraints are unchanged.

Closes #1022

Verification: tests, typecheck, and lint pass for @meridian/strategies; the branch is rebased onto current main.

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[collinsezedike]

@Fi-zzy thanks for the work. CI is red for two reasons.

pnpm format:check fails on packages/strategies/src/feeds.ts, packages/strategies/src/regime-scenarios.ts and packages/strategies/src/scenario-backtest.test.ts. Running pnpm exec prettier --write on those three clears the Lint & Typecheck job.

@meridian/strategies#build fails with TS2352 at regime-scenarios.ts:218, and that is what fails the Test job. Once the build is green, please confirm pnpm typecheck is clean with the Partial<Record<...>> holdings change in report.ts, because the failing tsc step stopped before consumers of finalState.holdings were checked.

[collinsezedike]

@Fi-zzy Object.fromEntries here infers { [k: string]: never[] }, and TS2352 rejects the direct cast to Record<AssetSymbol, ...>. This is the build failure that takes down the Test job. Type the record explicitly before filling it, or cast through unknown.

[collinsezedike]

@Fi-zzy widening holdings to Partial<...> is fine, but the tsc step never got past the build error above, so consumers that index a single asset (for example holdings[asset].toStroops()) have not been typechecked. Please confirm pnpm typecheck passes after the cast is fixed.

[collinsezedike]

@Fi-zzy the Typecheck job fails on the cast in regime-scenarios.ts and the Format job fails on feeds.ts, regime-scenarios.ts, and scenario-backtest.test.ts. Run pnpm format to fix the formatting.

[collinsezedike]

Object.fromEntries(...) is inferred as { [k: string]: never[] }, so this cast to Record<AssetSymbol, ...> is rejected with TS2352. Type the map callback so each entry is [AssetSymbol, Array<{ timestamp: number; price: FixedPointDecimal }>], or build the record with an explicit accumulator.

[collinsezedike]

@Fi-zzy the Typecheck job fails on the cast in regime-scenarios.ts and the Format job fails on feeds.ts, regime-scenarios.ts, and scenario-backtest.test.ts. Run pnpm format to fix the formatting.

[collinsezedike]

Object.fromEntries(...) is inferred as { [k: string]: never[] }, so this cast to Record<AssetSymbol, ...> is rejected with TS2352. Type the map callback so each entry is [AssetSymbol, Array<{ timestamp: number; price: FixedPointDecimal }>], or build the record with an explicit accumulator.

[collinsezedike]

Thank you for the updates, @Fi-zzy. The rebased branch resolves the cast and formatting failures, and the widened asset union is covered by XLM tests. All required checks pass; this is ready to merge. Please consider picking up another open issue.

[collinsezedike]

Thank you for your contribution, @Fi-zzy; if you have a moment, starring the repository would help the project reach more people.