Querying EAS Data

Two options. Hard-code the canonical preinstall addresses (EAS = 0x1000…0007, Indexer = 0x1000…0008) — fine for known networks. Or call the EAS precompile's getParams() so the same code works against any Maroo network without modification.

import { createPublicClient, http } from "viem";

const EAS_PRECOMPILE = "0x1000000000000000000000000000000000000009";
const { eas: EAS, indexer: INDEXER } = await publicClient.readContract({
  address: EAS_PRECOMPILE,
  abi: easPrecompileAbi,
  functionName: "getParams",
});

The default path for frontend dApps and most backend code. Use getAttestation(uid) against the EAS contract; it returns the full Attestation struct (schema, recipient, attester, time, expirationTime, revocationTime, refUID, data).

import { createPublicClient, http } from "viem";

const publicClient = createPublicClient({ transport: http(MAROO_RPC) });

const attestation = await publicClient.readContract({
  address: EAS,
  abi: easAbi,
  functionName: "getAttestation",
  args: [uid],
});
// attestation.recipient, attestation.revocationTime, attestation.expirationTime, ...

"Has user X been attested under schema Y?" — that's the Indexer. Two methods you'll use:

• getReceivedAttestationUIDCount(recipient, schemaUid) → cheap existence check
• getReceivedAttestationUIDs(recipient, schemaUid, start, length, reverseOrder) → paginated list

Then feed each UID into Method 1 to fetch the actual attestation.

// 1) count check
const count = await publicClient.readContract({
  address: INDEXER,
  abi: indexerAbi,
  functionName: "getReceivedAttestationUIDCount",
  args: [recipient, schemaUid],
});

// 2) most recent 5
const uids = await publicClient.readContract({
  address: INDEXER,
  abi: indexerAbi,
  functionName: "getReceivedAttestationUIDs",
  args: [recipient, schemaUid, 0n, 5n, true /* reverseOrder */],
});

If you already use the official @ethereum-attestation-service/eas-sdk in your stack, point it at the Maroo EAS address and use it normally. The SDK wraps getAttestation and the schema registry calls.

const { EAS } = require("@ethereum-attestation-service/eas-sdk");
const eas = new EAS(EAS); // canonical Maroo EAS address
await eas.connect(provider);
const attestation = await eas.getAttestation(uid);

When you just want to confirm a value from the shell.

# fetch one attestation
cast call $EAS "getAttestation(bytes32)" $UID --rpc-url $MAROO_RPC

# count attestations a user has under a schema
cast call $INDEXER \
  "getReceivedAttestationUIDCount(address,bytes32)(uint256)" \
  $RECIPIENT $SCHEMA_UID --rpc-url $MAROO_RPC