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fix(rust/cardano-chain-follower): Handle point 0 in mithril snapshot iterator #652

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fix(rust/cardano-chain-follower): Handle point 0 in mithril snapshot iterator #652

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83d5d90
fix point 0 in mithril snapshot iterator new
bkioshn Nov 18, 2025
16f1f47
update version
bkioshn Nov 19, 2025
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2 changes: 1 addition & 1 deletion rust/cardano-chain-follower/Cargo.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
[package]
name = "cardano-chain-follower"
version = "0.0.18"
version = "0.0.19"
edition.workspace = true
authors.workspace = true
homepage.workspace = true
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13 changes: 11 additions & 2 deletions rust/cardano-chain-follower/src/mithril_snapshot_iterator.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -187,8 +187,17 @@ impl MithrilSnapshotIterator {
from: &Point,
previous_point: Option<Point>,
) -> Result<Self> {
// If "from" is 0, it is origin.
// This is added to avoid the case where point 0 is considered
// as fuzzy and not origin.
let from = if from.slot_or_default() == 0.into() {
Point::ORIGIN
} else {
from.clone()
};

if from.is_fuzzy() || (!from.is_origin() && previous_point.is_none()) {
return Ok(Self::fuzzy_iterator(chain, path, from).await);
return Ok(Self::fuzzy_iterator(chain, path, &from).await);
}

let previous = if from.is_origin() {
Expand All @@ -202,7 +211,7 @@ impl MithrilSnapshotIterator {

debug!("Actual Mithril Iterator Start: {}", from);

let iterator = make_mithril_iterator(path, from, chain).await?;
let iterator = make_mithril_iterator(path, &from, chain).await?;

Ok(MithrilSnapshotIterator {
path: path.to_path_buf(),
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