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feat(core): bootstrap @payenv/core with the safe-fallback attempt engine - #3
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- TypeScript monorepo (pnpm workspaces, TypeScript 7, Vitest, Biome) - Money model in integer minor units with ISO 4217 exponents - Payment methods, unified statuses and transitions - Error taxonomy with retry classes (safe_to_fallback, do_not_retry, ambiguous) - Connector and capability interfaces - Capability-aware router with the priority strategy - Attempt engine enforcing ADR 0004: never try another connector while a previous attempt could still succeed; ambiguous attempts are resolved by checking the status with the same provider - Idempotency (atomic store create), refresh, lifecycle events - In-memory store for development and tests - CI on Node 20/22/24 with a DCO sign-off check The randomized invariant test tracks independently whether each provider proved that no money moved, and was checked against injected double-charge bugs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Signed-off-by: Jules Mahounou <234069818+jules-mahounou@users.noreply.github.com>
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The randomized invariant test tracks independently whether each provider proved that no money moved, and was checked against injected double-charge bugs.
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Checklist
git commit -s) — see DCOCHANGELOG.md(Unreleased) updated if behavior changed