Feat/rate limit redis backend 429 UI - #461
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Add an IssuerSigner interface in frontend/lib/signer.ts with two implementations: - EnvSigner: signs with a local secp256k1 private key (dev/mock only) - KmsSigner: delegates to AWS KMS via Sign(KeyId, Digest) — the raw private key never enters the Node.js process Selected via ISSUER_SIGNER=env|kms env var (defaults to env for local dev). KMS returns a DER signature which is converted to the raw (r,s) 64-byte form Noir expects. prehash: false semantics are preserved via KMS MessageType=DIGEST. The @stellarcred/issuer IssuerClient now accepts an IssuerSigner option alongside the legacy privateKey path, so existing code keeps working unchanged. Security notes documented in SECURITY.md. Generated with Codebuff 🤖 Co-Authored-By: Codebuff <noreply@codebuff.com>
… limiting - Add RATELIMIT_BACKEND env var (memory|redis) for selecting rate-limit backend. Memory works with no external dependency for local dev; Redis (Upstash) enables shared counters for serverless/multi-replica deploys. - Add separate wallet window (RATE_LIMIT_ISSUE_WALLET_WINDOW_SECONDS, default 3600s = 1 hour) vs IP window (default 60s = 1 minute) so the per-wallet limit has a longer horizon as intended. - Frontend /verify page now detects 429 responses and shows a friendly "try again in N seconds" message instead of a generic error. - Add tests for LIMITS.walletWindowMs, LIMITS.backend(), and 429 handling in the verify flow. - Document RATELIMIT_BACKEND, RATE_LIMIT_REDIS_URL, and RATE_LIMIT_ISSUE_WALLET_WINDOW_SECONDS in .env.example. - pnpm tsc --noEmit and pnpm build both pass. Generated with Codebuff 🤖 Co-Authored-By: Codebuff <noreply@codebuff.com>
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What does this PR do?
Closes #
Type of change
Merge requirements
cargo test(contracts),pnpm tsc --noEmit(frontend),pnpm build(frontend), circuit tests — all greenfixtures/<type>/artifacts updatedNEXT_PUBLIC_prefix on server-only env varsprehash:falsepreserved on any issuer signing path touched✅ Merge requirements
closes #70