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customClaims = options.custom && (\n options.custom instanceof Function\n ? await options.custom(payload)\n : options.custom\n );\n await verifyCustomClaims(payload, customClaims || {}, options.customClaimVerifiers ?? defaultCustomClaimVerifiers);\n return payload;\n };\n}\n\nexport function createGenerateMethod(keys: () => MaybePromise) {\n return async function generate(payload: any, exp?: string | number | Date) {\n const _keys = await keys();\n const privateKey = await jose.importJWK(_keys[0]);\n\n let jwt = new jose.SignJWT({\n jti: crypto.randomUUID(),\n ...payload,\n })\n .setProtectedHeader({ alg: _keys[0].alg })\n .setIssuedAt();\n\n if (exp) {\n jwt = jwt.setExpirationTime(exp);\n }\n\n return jwt.sign(privateKey);\n };\n}\n\nexport async function verifyThirdParty(\n token: string,\n options: JWTVerifyOptions = {},\n) {\n const payload = decode(token);\n const author = payload.iss?.match(/^@(\\w+)\\/\\w+$/)?.[1];\n if (!author) {\n throw new Error(\"issuer does not match the format `@handle/name`\");\n }\n if (payload.exp && payload.exp < (new Date().getTime() / 1000)) {\n throw new Error(\"token has expired\");\n }\n const url = getValEndpointFromName(`@${author}/jwks`);\n const method = createVerifyMethod(() => {\n return fetch(url)\n .then(res => res.json())\n .then(({ keys }) => keys);\n });\n return method(token, options);\n}\n\nexport function decode(token: string) {\n return jose.decodeJwt(token);\n}\n\nexport const defaultCustomClaimVerifiers: Record = {\n scope(payload, claimValue) {\n const scopes = claimValue instanceof Array\n ? claimValue\n : [claimValue];\n const payloadScopes = typeof payload.scope === \"string\"\n ? payload.scope.split(\" \")\n : payload.scope;\n if (!(payloadScopes instanceof Array)) {\n return false;\n }\n const payloadScopesSet = new Set(payloadScopes);\n return scopes.every(scope => payloadScopesSet.has(scope));\n },\n\n async maxUses(payload, claimValue) {\n if (typeof claimValue !== \"number\") {\n throw new 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