feat(jpyc): EIP-3009 transferWithAuthorization core lib (Phase 1 increment 1)#30
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JPYC ガスレスを EIP-3009 + relayer で実現する計画 (memory:jpyc-eip3009) の純ロジック基盤。
client (署名) と server (relay endpoint) が共有する外部依存なしの純関数群で、unit test で完全に
担保 (OOM で動かない form render とは独立に検証可能)。まだどこにも配線していない inert な追加。
- jpycEip712Domain / buildTransferWithAuthorizationTypedData: 署名用 EIP-712 (domain は
JPYC_V3_ASSET と単一情報源で {name:"JPY Coin", version:"1"})。
- encodeTransferWithAuthorizationCalldata: relay (Gelato sponsoredCall の data) 用 calldata。
- recoverTransferAuthorizationSigner: server 側で署名者==from を検証 (無効署名で relay 枠を浪費しない)。
- randomAuthorizationNonce / validateAuthorization (value>0・期限・有効窓・上限・nonce 形式)。
検証: tsc 0 · eslint 0 · 新規 unit 14 件 (署名 round-trip / calldata decode / 改竄検知 / 範囲検証) ·
full suite 2597 passed/0 failed。
次増分: /api/relay/jpyc (Gelato sponsoredCall) — @gelatonetwork/relay-sdk 追加 + GELATO_SPONSOR_API_KEY
+ 1Balance 入金が前提。
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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/api/relay/jpyc: 顧客の transferWithAuthorization 署名を受け、検証 → Gelato sponsoredCall で
submit → poll → {txHash}。委任不要なので現行 7702 経路より到達が広い (Polygon・memory:jpyc-eip3009)。
まだ client に未配線・GELATO_SPONSOR_API_KEY 未設定なら 503 relay_not_configured を返す inert 追加。
- lib/relay/jpycRelay.ts: 依存注入の純コア (検証→署名 recover==from→残高→rate-limit→submit→poll)。
I/O を inject するので viem/fetch を mock せず全分岐を unit test (9 件) で担保。
- app/api/relay/jpyc/route.ts: 薄い adapter。実依存を wire — viem balanceOf / Gelato REST
(fetch・**deprecated SDK は使わず** sponsored-call + tasks/status を直叩き) / KV sliding-window
rate-limit (per from + IP) / env-gate。Gelato は Polygon 対応・Kaia 非対応なので対象 chain を
Polygon(+Amoy) に限定。
- 濫用対策: サーバ署名検証 (無効署名で枠浪費せず)・残高事前確認・value 上限・rate-limit。
- **新規依存なし** (install した @gelatonetwork/relay-sdk は deprecated だったので REST 直叩きに切替)。
検証: tsc 0 · eslint 0 · 新規 unit 10 件 (relay コア 9 + route env-gate 1) · full suite 2607 passed/0 failed。
次増分: client hook (useJpycEip3009Payment) + resolveJpycGaslessProvider + form 配線 + 記録。
本番稼働は GELATO_SPONSOR_API_KEY + 1Balance 入金が前提。
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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JPYC ガスレスを EIP-3009 + relayer で実現する計画([memory] Phase 0 検証で Polygon+Kaia GO)の 純ロジック基盤。client(署名)と server(relay endpoint)が共有する外部依存なしの純関数で、まだ配線していない inert な追加(unit test で完全担保)。
buildTransferWithAuthorizationTypedData— 署名用 EIP-712(domain{name:"JPY Coin", version:"1"}、x402 と単一情報源)encodeTransferWithAuthorizationCalldata— relay(GelatosponsoredCallの data)用 calldatarecoverTransferAuthorizationSigner— server 側で署名者==from を検証(無効署名で relay 枠を浪費しない)randomAuthorizationNonce/validateAuthorization(value>0・期限・有効窓・上限・nonce 形式)新規 unit 14 件(署名 round-trip / calldata decode / 改竄検知 / 範囲検証)。tsc 0 · eslint 0 · 全 2597 passed/0 failed。
次増分:
/api/relay/jpyc(GelatosponsoredCall)。🤖 Generated with Claude Code