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eip-review-bot merged 3 commits into from
Oct 2, 2026
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Update ERC-8330: Move to Last Call #2024

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85ad3ca
Move ERC-8330 to Last Call
david-hay Sep 21, 2026
388b09a
docs(erc-8330): address final review feedback
david-hay Sep 30, 2026
abd220f
Update ERC-8330: Extend Last Call deadline
david-hay Oct 2, 2026
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21 changes: 9 additions & 12 deletions ERCS/erc-8330.md
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Expand Up @@ -4,7 +4,8 @@ title: Subject-Linked NAV Snapshot Oracle
description: Defines subject-linked NAV streams with provider attribution, corrections, invalidation, staleness, and aggregation
author: Chris Turner <c.turner@kula.com>, David Hay (@david-hay), Reagan Simpson (@krumg111), Collins Musyimi (@Musyimi97)
discussions-to: https://ethereum-magicians.org/t/erc-8330-subject-linked-nav-snapshot-oracle/28939
status: Review
status: Last Call
last-call-deadline: 2026-10-19
type: Standards Track
category: ERC
created: 2026-07-05
Expand All @@ -13,8 +14,9 @@ requires: 165

## Abstract

This ERC defines an interface for publishing and querying subject-linked Net
Asset Value (NAV) snapshots. Each stream is keyed by `(subjectId, currency)` and
This Ethereum Request for Comments (ERC) defines an interface for publishing
and querying subject-linked net asset value (NAV) snapshots. Each stream is
keyed by `(subjectId, currency)` and
has one configured NAV basis. Snapshots include signed NAV, decimal precision,
valuation and publication timestamps, provider attribution, methodology
references, and correction provenance.
Expand Down Expand Up @@ -111,6 +113,8 @@ always greater than its target and therefore cannot be zero.
A compliant oracle MUST implement:

```solidity
pragma solidity ^0.8.20;
interface INAVSnapshotOracle {
struct NAVSnapshot {
bytes32 subjectId;
Expand Down Expand Up @@ -553,6 +557,8 @@ be publication-fresh but valuation-stale.
Aggregation is OPTIONAL. An implementation supporting it MUST implement:

```solidity
pragma solidity ^0.8.20;
interface INAVAggregation {
event NAVDeviationDetected(
bytes32 indexed subjectId,
Expand Down Expand Up @@ -780,11 +786,6 @@ independently.

### Prior Art

The Common Quote Oracle proposal defines a common quote interface returning the
amount of one asset in another asset's terms. This ERC defines historical NAV
snapshots with valuation timestamps, providers, methodology, corrections,
invalidation, and staleness metadata.

[ERC-4626](./eip-4626.md) defines tokenized vault accounting and conversion
functions. This ERC can provide an external valuation input but does not define
vault accounting, deposits, withdrawals, or redemption guarantees.
Expand All @@ -793,10 +794,6 @@ vault accounting, deposits, withdrawals, or redemption guarantees.
[ERC-7575](./eip-7575.md) supports multi-asset vaults. Both may consume NAV but
do not define this provider-attributed snapshot lifecycle.

General market-price feeds often use heartbeat and deviation mechanisms for
liquid assets. This ERC applies separate publication and valuation age to
periodic NAV and exposes methodology and correction history.

## Backwards Compatibility

This ERC introduces new interfaces and does not modify existing token, vault,
Expand Down
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