Crate vex_anchor 

VEX Anchor

Public anchoring layer for VEX audit logs.

Provides cryptographic anchoring of Merkle roots to external systems for tamper-evident, publicly-verifiable audit trails.

Supported Backends (2026)

• FileAnchor: Local append-only JSON log (default, for development)
• GitAnchor: Commits roots to a Git repository
• OpenTimestampsAnchor: Bitcoin calendar anchoring via the public OTS protocol
• EthereumAnchor: Ethereum calldata anchoring via JSON-RPC
• CelestiaAnchor: Celestia DA blob anchoring

Quick Start

use vex_anchor::{AnchorBackend, FileAnchor, AnchorMetadata};
use vex_core::Hash;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let anchor = FileAnchor::new("./anchors.json");
     
    let root = Hash::digest(b"merkle_root_data");
    let metadata = AnchorMetadata::new("tenant-1", 100);
     
    let receipt = anchor.anchor(&root, metadata).await?;
    println!("Anchored at: {}", receipt.anchor_id);
     
    Ok(())
}

Structs

AnchorMetadata

Metadata about the data being anchored

AnchorReceipt

Receipt proving that a root was anchored

CelestiaAnchor

Celestia DA anchor backend

EthereumAnchor

Ethereum anchor backend

FileAnchor

File-based anchor backend

GitAnchor

Git-based anchor backend

OpenTimestampsAnchor

OpenTimestamps calendar anchor backend

Enums

AnchorError

Errors that can occur during anchoring operations

Traits

AnchorBackend

Trait for anchoring backends