Query ArdmerePoRAnchor

How to read exchange PoR audit / anchor records from the on-chain ArdmerePoRAnchor contract. Use this when you want to confirm that a homepage report snapshot was anchored, or to pull the digest roots that bind an assessment.

Related: Deployments · Full ABI / query API · Evidence archive

What is on-chain

Each successful anchorSnapshot stores one immutable SnapshotRecord (schema v3) and emits SnapshotAnchored. The record holds exchange id, period, snapshot time, and the Merkle roots of the artifact and verification bundles—not the raw PoR files.

Always call the proxy address (UUPS). Do not send reads to the implementation address.

Network and proxy

Operable deployment today is Ethereum Sepolia only. Base mainnet is the product target but is not deployed yet—see deployments.md.

Copy the live Proxy (ANCHOR_CONTRACT) row from that file (and the matching Etherscan / Sourcify links). Summary of the current testnet instance:

# Proxy address: copy from docs/deployments.md (Proxy / ANCHOR_CONTRACT row)
export ANCHOR_CONTRACT=0x…   # Sepolia proxy
export RPC_URL=…             # any Sepolia HTTPS RPC

Sepolia anchors are testnet evidence. Treat them as reproducible digests, not mainnet production finality.

Identifiers

cast keccak "502260945"
# 0xadc693dc11246c6b6472251c2b8aa6a79b2e84d12d9635db7b123b3049bd36c4

cast keccak "okx"
# 0xd6b6d5e0aacce0469a313983d889ed10d0bb7c9545af0285a19b4ff094b4041d

Prefer lookup by snapshotId from the homepage Snapshot column (same string as the report filename prefix). periodSeq on-chain may differ from the periodSeq field inside assessment JSON when the operator allocated the next free period for that exchange.

Read methods (ABI)

Source: contracts/src/ArdmerePoRAnchor.sol. Full field notes: anchor-query-api.md.

SnapshotRecord fields used most often when auditing a homepage report:

• exchange, periodSeq, snapshotTime, btcBlockHeight
• artifactBundleRoot, verificationBundleRoot
• exchangeMerkleRoot, verdictSummary, coverageBps, anchoredAt

Minimal ABI for cast / ethers:

snapshotExists(bytes32)(bool)
getSnapshot(bytes32)((bytes32,bytes32,string,uint32,uint64,uint32,bytes32,bytes32,bytes32,uint8,uint16,uint8,uint256))
getLatestSnapshot(bytes32)((bytes32,bytes32,string,uint32,uint64,uint32,bytes32,bytes32,bytes32,uint8,uint16,uint8,uint256))
getSnapshotCount(bytes32)(uint256)

Homepage snapshot examples

These audit ids match the current public homepage report set and are anchored on Sepolia (see the homepage table in deployments.md).

Check that a homepage row is anchored

# ANCHOR_CONTRACT = Proxy row from docs/deployments.md
export ANCHOR_CONTRACT=0x…
export RPC_URL=${RPC_URL:-https://rpc.sepolia.org}
RECORD_TUPLE="(bytes32,bytes32,string,uint32,uint64,uint32,bytes32,bytes32,bytes32,uint8,uint16,uint8,uint256)"

# OKX Stage 1 row on the homepage
cast call $ANCHOR_CONTRACT "snapshotExists(bytes32)(bool)" \
  $(cast keccak "502260945") --rpc-url $RPC_URL

cast call $ANCHOR_CONTRACT "getSnapshot(bytes32)${RECORD_TUPLE}" \
  $(cast keccak "502260945") --rpc-url $RPC_URL

Binance PR01OCT26

cast call $ANCHOR_CONTRACT "snapshotExists(bytes32)(bool)" \
  $(cast keccak "PR01OCT26") --rpc-url $RPC_URL

cast call $ANCHOR_CONTRACT "getSnapshot(bytes32)${RECORD_TUPLE}" \
  $(cast keccak "PR01OCT26") --rpc-url $RPC_URL

# Latest Binance anchor (may be this id after the homepage batch)
cast call $ANCHOR_CONTRACT "getLatestSnapshot(bytes32)${RECORD_TUPLE}" \
  $(cast keccak "binance") --rpc-url $RPC_URL

Count anchors per exchange

for x in binance okx bingx mexc kucoin; do
  echo -n "$x "
  cast call $ANCHOR_CONTRACT "getSnapshotCount(bytes32)(uint256)" \
    $(cast keccak "$x") --rpc-url $RPC_URL
done

After the homepage assessment batch documented in deployments, counts include at least: binance 4, okx 4, bingx 2, kucoin 1, mexc 1.

Match roots to the public assessment JSON

1. Read artifactBundleRoot and verificationBundleRoot from getSnapshot.
2. Open docs/reports/<exchange>/<auditId>-assessment.json.
3. Compare to artifacts.artifactBundleRoot and artifacts.verificationBundleRoot.

Example paths for homepage rows:

• docs/reports/okx/502260945-assessment.json
• docs/reports/binance/PR01OCT26-assessment.json
• docs/reports/mexc/202610-assessment.json
• docs/reports/bingx/20261015-assessment.json

Matching roots means the on-chain digest agrees with that assessment file. Full PoR replay still needs the artifact archive and por verify.

Etherscan

Open the Sepolia proxy’s Read as Proxy tab (address in deployments.md), use the verified ABI, and call snapshotExists / getSnapshot with a snapshotId from the table above (as bytes32).

Further reading