ErrLookup › signalapp/Signal-Server

signalapp/Signal-Server

Server supporting the Signal Private Messenger applications on Android, Desktop, and iOS · Java · 898 source files

Analyzed at 100ab61c82 on 2026-09-09. 171 documented errors.

Code / Message	Type	Severity	Tags
backup auth credential presentation verification failed	exception	error	zk-authentication, backup, zero-knowledge
return Response.status(429).build();	http	warning	http, rate-limit, jaxrs, signal-server
cannot use app store purchases for one-time donations	http	error	bad-request, donations, payment-processor, unsupported-operation
?…	http	warning	http, verification, sms, registration
429 Too Many Requests or 409 Conflict (not allowed to…	http	warning	http-429, http-409, rate-limit, verification, captcha
transactionId did not include a paid subscription or the…	exception	error	app-store, original-transaction-id, subscription-lookup, argument-validation
Unexpected HTTP status code	exception	error	google-play, billing, http, api-error
400 Bad Request (invalid ProfileKeyCommitment base64)	http	error	base64, jackson, deserialization, profile-key
Missing required device capability	http	error	registration, capabilities, validation, client-version
429 Too Many Requests (rate limit exceeded)	http	warning	rate-limit, http-429, captcha, verification
receipt is already expired	exception	error	zk-receipt, backup-auth, expiration
backup auth credential presentation signature verification…	exception	error	zk-authentication, signature, backup
403 Forbidden	http	error	forbidden, http-403, captcha, push-challenge, verification
Could not parse public key as a base64-encoded value	validation	error
Sign count from request less than stored sign count	exception	error	devicecheck, replay-protection, sign-counter, anti-reuse
Invalid receipt credential presentation	http	error	zk-receipt, registration, bad-request, malformed-input
must not use authenticated connection for subscriber…	exception	error	auth, subscriptions, forbidden
Received bad envelope type	http	warning	protobuf, enum, bad-request, validation
too few parts	validation	error	captcha, input-format, validation
Could not parse string as a base64-encoded value	validation	error
existing processor does not match	exception	error	payments, subscriptions, processor-conflict
login purchases are not enabled	http	warning	feature-flag, registration, bad-request, server-config
bj	validation	error	phone-number, benin, obsolete-format, libphonenumber
Could not interpret bytes as a ZK credential public key	validation	error	json, deserialization, zk-credentials, signal
sendErrorResponse(requestMessage…	http	error	websocket, http-500, internal-server-error
purchase has no line items	exception	error	google-play-billing, line-items, empty-response, purchase-token
Receipt credential presentation verification failed	http	error	zk-receipt, signature-verification, registration, not-authorized
Start timestamp not specified	validation	warning	api, validation, missing-field
receipt credential request failed verification	http	error	zkp, verification-failed, bad-request, donations
recovery password could not be verified	http	error	registration, recovery-password, forbidden, verification
`INVALID_ARGUMENT` extension requires a value to be set	validation	warning	grpc, protobuf, validation, invalid-argument
wrong credential type for the requested operation	exception	error	backup, credential-type, authorization
could not parse already validated number	http	error	phone-number, internal-error, parsing, http-500
Key ID %08x has been reserved or revoked and may not be…	console	error	cli, certificates, security
Badly-formatted credentials:	http	error	basic-auth, malformed, credentials
Cannot acknowledge purchase for subscription in state	exception	error	google-play-billing, subscription-state, payment-required, purchase-acknowledgement
.status(409)	http	error	http, encryption, device-management, conflict
Invalid sourceObject size	exception	error	backup, media-copy, size-limit
server does not recognize the requested receipt level	exception	error	zk-receipt, backup-auth, receipt-level
registration session is unverified	http	error	registration, session, unauthorized, verification
return Response.status(499).build();	http	warning	http, phone-number, deprecated-format, validation
number does not match session	exception	error	phone-verification, session-mismatch, registration
return Response.status(503).build();	http	error	http, io, server-error, jaxrs
503 Service Unavailable	http	error	http-503, captcha, upstream, network, io
User-Agent string is blank	validation	warning	user-agent, http-headers, parsing, signal
timestamps must be day aligned	validation	error	validation, date-range, day-alignment
use websockets	http	error	rest, websocket, deprecation, user-agent, http-client
must not use authenticated connection for login purchase…	http	error	authentication, http-403, login-purchase
result.getMessage()	exception	error	braintree, payment-provider, customer-creation, gateway-error
Could not interpret bytes as a BackupAuth object	validation	error
Could not interpret key bytes as a public key	validation	error
failed to make http request to Cloudflare Turn	http	error	network, http-client, cloudflare, timeout
must cancel subscription with storekit before deleting	exception	error	app-store, storekit, subscription-cancellation, precondition
invalid captcha scheme	validation	error	captcha, configuration, validation
Provided challenge did not match stored challenge	exception	error	devicecheck, challenge, replay-protection, apple
unknown payment provider:	exception	error	payment-provider, one-time-purchase, argument-validation, unsupported-provider
invalid receipt credential request	exception	error	zk-receipts, deserialization, invalid-input
transaction is not a consumable one-time purchase	exception	error	app-store, one-time-purchase, transaction-type, argument-validation
Failed to delete backup	exception	error	http, backup, account-deletion, svr
Could not interpret identity key bytes as an EC public key	validation	error	json, deserialization, identity-key, signal
Receipt is already expired	http	error	zk-receipt, expired-credential, registration, not-authorized
failure request credentials from Cloudflare Turn	http	error	http, cloudflare, credentials, turn
Recovery password required for for storage when recovering…	http	error	account-recovery, missing-field, bad-request, account-attributes
Could not parse key as a base64-encoded value	validation	error	json, base64, deserialization, zk-credentials
400 Bad Request	http	error	http-400, bad-request, captcha, validation
Endpoint requires unauthenticated access	http	error	authentication, bad-request-400, key-transparency
409 Conflict (session already verified)	http	warning	http-409, conflict, already-verified, verification
purchase was for an unexpected product	exception	error	receipt-level, one-time-purchase, product-mismatch, argument-validation
receipt serial is already redeemed	exception	error	zk-receipt, replay-protection, backup-auth
invalid captcha action	validation	error	captcha, validation, api
Operation requires unauthenticated access	http	error	authentication, bad-request, anonymous
return Response.status(411)	http	error	http, devices, limit-exceeded, jaxrs
Registration service failure	http	error	network, grpc, backend-service, transient-failure
Could not parse identity key as a base64-encoded value	validation	error
PNI identity key must not be provided if existing account…	validation	error	illegal-argument, accounts, pni, validation
registration service unavailable	http	error	network, timeout, async, backend-service
S3 object too large	exception	error	s3, aws, file-size, config
exceeded maximum uploadLength	http	error	http-413, payload-size, validation, signal
500 Internal Server Error (registration service failure)	http	critical	http-500, grpc, registration-service, server-error
access key length must be 16	http	error	http-401, base64, access-key, auth
IOExceptionMapper	http	warning	io, http, timeout, exception-mapper
return Response.status(508).build();	http	error	http, fraud-detection, registration, rejection
Invalid combined unidentified sender access keys	http	error	http-401, base64, access-key, auth
credential does not support the requested operation	exception	error	backup, authorization, quota
Receipt already redeemed	http	error	zk-receipt, single-use, registration, replay, not-authorized
Empty body not allowed	http	error	http, request-body, validation
cannot create payment methods with payment type	http	error	http-400, bad-request, payments, subscriptions
return Response.status(422).build();	http	warning	http, json, deserialization, jaxrs
subscriberId mismatch	exception	error	subscriptions, hmac, auth, mismatch
return Response.status(404).build();	http	error	http, push-notifications, jaxrs, device-registration
Encountered a negative retry duration	http	warning	rate-limit, http-429, retry-after, duration
Recipient list is empty	http	error	http-400, empty-list, validation
Group send endorsement tokens should not be combined with…	http	error	http-400, authentication, group-send-endorsements
Only primary devices may register attestations	http	error	http-403, devicecheck, signal-server
Recovery password required for authentication when…	http	error	account-recovery, missing-field, bad-request, recovery-password
must not use authenticated connection for anonymous…	http	error	backup, authentication, bad-request
.status(410)	http	error	http, encryption, stale-devices, signal-protocol
invalid captcha site-key	validation	error	captcha, configuration, validation
receipt credential presentation verification failed	exception	error	cryptography, zkp, receipt-verification, backup
return Response.status(428).build();	http	warning	http, security, captcha