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\"unknown\"}|${Deno.env.get(\"VAL_TOWN_PROJECT_ID\") ?? \"unknown\"}`);\nconst PUB = await ed.getPublicKeyAsync(IDENTITY_SEED);\nconst PUB_B64 = b64e(PUB);\nconst PUB_FP = await sha256Bytes(PUB);\nconst CASE_SET_DIGEST = await sha256Bytes(concat(CASE_SALT, canonicalBytes(CASES)));\nconst BOOT_NONCE = crypto.randomUUID();\n\nawait sqlite.execute(`CREATE TABLE IF NOT EXISTS consumed_requests (\n digest TEXT PRIMARY KEY,\n consumed_at TEXT NOT NULL\n)`);\n\nfunction mustEnv(name: string): string {\n const v = Deno.env.get(name)?.trim();\n if (!v) throw new Error(`missing_required_env:${name}`);\n return v;\n}\nfunction b64e(data: Uint8Array): string {\n let s = \"\"; for (const b of data) s += String.fromCharCode(b);\n return btoa(s).replaceAll(\"+\", \"-\").replaceAll(\"/\", \"_\").replace(/=+$/g, \"\");\n}\nfunction b64d(text: string): Uint8Array {\n const s = text.replaceAll(\"-\", \"+\").replaceAll(\"_\", \"/\") + \"=\".repeat((4 - text.length % 4) % 4);\n return Uint8Array.from(atob(s), c => c.charCodeAt(0));\n}\nfunction concat(a: Uint8Array, b: Uint8Array): Uint8Array {\n const out = new Uint8Array(a.length + b.length); out.set(a); out.set(b, a.length); return out;\n}\nfunction canonical(value: unknown): string {\n if (value === null || typeof value !== \"object\") return JSON.stringify(value);\n if (Array.isArray(value)) return `[${value.map(canonical).join(\",\")}]`;\n const obj = value as Record;\n return `{${Object.keys(obj).sort().map(k => `${JSON.stringify(k)}:${canonical(obj[k])}`).join(\",\")}}`;\n}\nfunction canonicalBytes(value: unknown): Uint8Array { return enc.encode(canonical(value)); }\nasync function sha256(text: string): Promise { return sha256Bytes(enc.encode(text)); }\nasync function sha256Bytes(bytes: Uint8Array): Promise {\n const d = new Uint8Array(await crypto.subtle.digest(\"SHA-256\", bytes));\n return [...d].map(x => x.toString(16).padStart(2,\"0\")).join(\"\");\n}\nfunction now(): string { return new Date().toISOString(); }\nasync function signed(payload: Record) {\n const sig = await ed.signAsync(canonicalBytes(payload), IDENTITY_SEED);\n return { payload, signature_b64: b64e(sig), public_key_b64: PUB_B64 };\n}\nasync function json(req: Request): Promise {\n try { return await req.json(); } catch { throw new HttpError(400, \"invalid_json\"); }\n}\nclass HttpError extends Error { constructor(public status: number, message: string){ super(message); } }\nfunction respond(body: unknown, status=200): Response { return Response.json(body, {status}); }\n\nasync function claim(digest: string): Promise {\n try {\n await sqlite.execute({sql:\"INSERT INTO consumed_requests(digest, consumed_at) VALUES(?, ?)\", args:[digest, now()]});\n return true;\n } catch (e) {\n if (String(e).toLowerCase().includes(\"unique\") || String(e).toLowerCase().includes(\"constraint\")) return false;\n throw e;\n }\n}\n\nasync function verifyRequest(obj: any): Promise<{payload:any,digest:string}> {\n if (obj?.controller_public_key_b64 !== CONTROLLER_PUB) throw new HttpError(401,\"controller_key_mismatch\");\n const payload = obj?.payload;\n if (payload?.version !== \"rumbo-remote-evaluation-request/v1\") throw new HttpError(400,\"request_version_invalid\");\n let ok=false;\n try { ok = await ed.verifyAsync(b64d(obj.signature_b64), canonicalBytes(payload), b64d(CONTROLLER_PUB)); } catch {}\n if (!ok) throw new HttpError(401,\"request_signature_invalid\");\n const issued = Date.parse(payload.issued_at_utc);\n if (!Number.isFinite(issued)) throw new HttpError(400,\"request_time_invalid\");\n const age = (Date.now() - issued)/1000;\n if (age < -30 || age > MAX_AGE_SECONDS) throw new HttpError(409,\"request_expired_or_future\");\n const digest = await sha256(canonical(obj));\n if (!(await claim(digest))) throw new HttpError(409,\"request_replay\");\n return {payload,digest};\n}\n\nasync function route(req: Request): Promise {\n const u = new URL(req.url);\n if (req.method === \"GET\" && u.pathname.endsWith(\"/health\")) {\n return respond({ok:true,service_id:SERVICE_ID,evaluator_id:EVALUATOR_ID,role:\"evaluator\",persistence:\"val-scoped-sqlite\"});\n }\n if (req.method === \"GET\" && u.pathname.endsWith(\"/v1/identity\")) {\n return respond(await signed({version:\"rumbo-service-identity/v1\",service_id:SERVICE_ID,role:\"evaluator\",administrative_domain:ADMIN_DOMAIN,host_fingerprint:HOST_FINGERPRINT,public_key_fingerprint:PUB_FP,workload_id:WORKLOAD_ID,boot_nonce:BOOT_NONCE,issued_at_utc:now()}));\n }\n if (req.method === \"POST\" && u.pathname.endsWith(\"/v1/challenge\")) {\n const body = await json(req); const nonce = String(body?.nonce ?? \"\");\n if (nonce.length < 16 || nonce.length > 256) throw new HttpError(400,\"nonce_length_invalid\");\n return respond(await signed({version:\"rumbo-service-liveness/v1\",service_id:SERVICE_ID,challenge_nonce:nonce,host_fingerprint:HOST_FINGERPRINT,boot_nonce:BOOT_NONCE,issued_at_utc:now()}));\n }\n if (req.method === \"POST\" && u.pathname.endsWith(\"/v1/evaluate\")) {\n const raw = await json(req); const {payload,digest} = await verifyRequest(raw);\n const solution = String(payload.solution ?? \"\");\n const scores = CASES.map((c:any) => (c.required_tokens ?? []).every((t:string)=>solution.includes(t)) && (c.forbidden_tokens ?? []).every((t:string)=>!solution.includes(t)) ? 1 : 0);\n const passRate = scores.reduce((a:number,b:number)=>a+b,0)/scores.length;\n const passed = passRate >= MIN_PASS_RATE;\n const evidenceDigest = await sha256(canonical({evaluator:EVALUATOR_ID,candidate:payload.candidate_id,challenge:payload.challenge_id,case_set:CASE_SET_DIGEST,scores,request_sha256:digest}));\n const receipt = await signed({version:\"rumbo-evaluator-receipt/v1\",evaluator_id:EVALUATOR_ID,candidate_id:payload.candidate_id,challenge_id:payload.challenge_id,passed,pass_rate:passRate,case_count:CASES.length,case_set_digest:CASE_SET_DIGEST,evidence_digest:evidenceDigest,status:passed?\"passed\":\"hidden_gate_failed\",worker_pid:Deno.pid,issued_at_utc:now(),nonce:crypto.randomUUID(),public_key_fingerprint:PUB_FP,administrative_domain:ADMIN_DOMAIN,host_fingerprint:HOST_FINGERPRINT});\n const responsePayload = {version:\"rumbo-remote-evaluation-response/v1\",endpoint_id:SERVICE_ID,request_sha256:digest,evaluator_receipt:receipt,issued_at_utc:now(),nonce:crypto.randomUUID()};\n const sig = await ed.signAsync(canonicalBytes(responsePayload), IDENTITY_SEED);\n return respond({payload:responsePayload,signature_b64:b64e(sig),evaluator_public_key_b64:PUB_B64});\n }\n return respond({error:\"not_found\"},404);\n}\n\nexport default async function(req: Request): Promise {\n try { return await route(req); 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