Enum AppendOutcome 

pub enum AppendOutcome {
    Appended {
        seq: u64,
    },
    IdempotentReplay {
        prior: PriorEvent,
    },
    Conflict {
        prior: PriorEvent,
    },
}

The three observable outcomes of an append_and_apply_idempotent call — the shared --idempotency-key contract that event create, discussion resolve, and future keyed verbs (spinoff approve|reject, run create, node report) all answer to, lifted out of each CLI’s private log scan.

The discriminator is whether a prior event with the same kind + key already exists, and — if so — whether the call’s (node_id, data) identity matches that prior event:

• AppendOutcome::Appended — no prior event carried this key: a fresh event was appended and folded into the projections. seq is its sequence.
• AppendOutcome::IdempotentReplay — a prior event carried this key and the same node_id + data: a true retry. Nothing was appended; the prior event (its seq / node_id / data) is returned so the caller can surface the original sequence.
• AppendOutcome::Conflict — a prior event carried this key but with a different node_id or data: the key was reused for a different request (a client bug, Stripe-style). Nothing was appended; prior is returned so the caller can build a precise conflict error (e.g. diff the payload vs. the node id).

Variants

Appended

A fresh event was appended and applied; seq is its sequence number.

Fields

seq: u64

The appended event’s seq.

IdempotentReplay

The key matched a prior event with identical node_id + data. No new event was written; prior.seq is the original sequence to surface.

Fields

prior: PriorEvent

The pre-existing matching event (its seq, node_id, and data).

Conflict

The key matched a prior event whose node_id or data differs from this request. No new event was written; the caller should reject the reuse.

Fields

prior: PriorEvent

The pre-existing event recorded under the same key, for the caller’s conflict diagnostics (prior.seq is the original sequence).

Trait Implementations

impl Debug for AppendOutcome

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.