Struct PoolUpdateFailure 

pub struct PoolUpdateFailure {
    pub error: RunError,
    pub rpc_url: String,
    pub chain_id: i64,
    pub from_block: u64,
    pub to_block: Option<u64>,
    pub resume: Option<Vec<ExchangeResumeState>>,
}

A pool update (or pool verify) core failure plus the run context the arm held when the core returned it.

The bare library text (api error: backend connection task has stopped) alone is not an operator diagnostic, and the arm must not have to reconstruct the run’s identity at the print site — so the payload carries it structurally: the endpoint, the chain, the requested block range, and, for a mid-run failure, the per-exchange resume state read out of the operator database. The updater commits per chunk, so a failed run keeps every committed chunk and leaves the remaining exchanges’ outstanding work recorded in their cursors; the failure report makes it visible.

Fields

error: RunError

The underlying core error.

rpc_url: String

The RPC endpoint the run was bound to.

chain_id: i64

The chain the run advances.

from_block: u64

The first block the run intended to process (the earliest committed cursor + 1; mirrors the core’s own initial_start_block).

to_block: Option<u64>

The requested upper bound; None when the run targeted the chain tip.

resume: Option<Vec<ExchangeResumeState>>

The post-failure per-exchange resume snapshot; None when the read-only cursor read itself failed (or a non-run failure carried no snapshot).

Implementations

impl PoolUpdateFailure

pub fn message(&self) -> String

The operator-facing failure text.

Trait Implementations

impl Debug for PoolUpdateFailure

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

Formats the value using the given formatter.