FREE_FLOW_BARRED

This sender is temporarily barred from the free flow.

HTTP status	403
Group	Relay path
Retryable	No — sending it again changes nothing
Re-sign	NONE — do not ask the user to sign anything

What happened

Repeated failing free transactions trip the strike rule.

What to do

Wait until details.untilMs, or pay the gas yourself for this transaction.

Extra members

This code carries untilMs in the problem document, on top of the common members.

The problem document

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

{
  "type": "https://docs.co-relayer.com/errors/free-flow-barred",
  "title": "This sender is temporarily barred from the free flow.",
  "status": 403,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "FREE_FLOW_BARRED",
  "retryable": false,
  "resign": "NONE",
  "hint": "Wait until `details.untilMs`, or pay the gas yourself for this transaction."
}

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