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[Fortune][Exchange Oracle] Implement caching for public key retrieval in JwtHttpStrategy #3371

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Merged
flopez7 merged 1 commit into from
May 29, 2025
Merged

[Fortune][Exchange Oracle] Implement caching for public key retrieval in JwtHttpStrategy #3371

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39 changes: 30 additions & 9 deletions packages/apps/fortune/exchange-oracle/server/src/common/guards/strategy/jwt.http.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,11 @@ import { AuthError, ValidationError } from '../../errors';

@Injectable()
export class JwtHttpStrategy extends PassportStrategy(Strategy, 'jwt-http') {
// In-memory cache for public keys with expiration
private publicKeyCache: Map<string, { value: string; expires: number }> =
new Map();
private cacheTTL = 24 * 60 * 60 * 1000; // 1 day

constructor(private readonly web3Service: Web3Service) {
super({
jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
Expand All @@ -26,15 +31,31 @@ export class JwtHttpStrategy extends PassportStrategy(Strategy, 'jwt-http') {
try {
const payload = jwt.decode(rawJwtToken);
const chainId = this.web3Service.getValidChains()[0];
const signer = this.web3Service.getSigner(chainId);

const url = await this.getFileUrlAndVerifyHash(
signer,
chainId,
(payload as any).reputation_network,
JWT_KVSTORE_KEY,
);
const publicKey = await StorageClient.downloadFileFromUrl(url);
const address = (payload as any).reputation_network;
const cacheKey = `${chainId}-${address}`;

const cached = this.publicKeyCache.get(cacheKey);

let publicKey: string | undefined;
if (cached && cached.expires > Date.now()) {
publicKey = cached.value;
} else {
const signer = this.web3Service.getSigner(chainId);
const url = await this.getFileUrlAndVerifyHash(
signer,
chainId,
address,
JWT_KVSTORE_KEY,
);
publicKey = (await StorageClient.downloadFileFromUrl(
url,
)) as string;

this.publicKeyCache.set(cacheKey, {
value: publicKey,
expires: Date.now() + this.cacheTTL,
});
}

done(null, publicKey);
} catch (error) {
Expand Down