SIGNER_UNAVAILABLE

The signer process could not be reached.

HTTP status	503
Group	Relay path
Retryable	Yes — the same request may be sent again
Re-sign	SAME_BYTES — resend the transaction you already have, byte for byte

What happened

Its host is restarting, draining or otherwise not accepting work.

What to do

Retry with the same bytes.

The problem document

Every error is application/problem+json (RFC 9457) with the same shape:

{
  "type": "https://docs.co-relayer.com/errors/signer-unavailable",
  "title": "The signer process could not be reached.",
  "status": 503,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "SIGNER_UNAVAILABLE",
  "retryable": true,
  "resign": "SAME_BYTES",
  "hint": "Retry with the same bytes."
}

See the error model for what each member means and how to handle unknown codes.