Schema A — Brand attestation

string brandName, uint256 verifiedSince, string kybCohort, string offchainProjectionId

curl -s https://apiv3.droplinked.com/v2/attestations/brand/my-shop-slug | jq .

{
  "found": true,
  "chain": "base",
  "attestationUid": "0x9a3c…ee01",
  "schemaUid": "0xf16f…e5a3",
  "issuer": "0xD5F6FB7b6E71DD7F609b8442951444E5a5C76cce",
  "recipient": "0x…",
  "issuedAt": "2026-06-14T18:08:00Z",
  "status": "ACTIVE",
  "attestationData": {
    "brandName": "My Shop",
    "verifiedSince": "2026-03-02T00:00:00Z",
    "kybCohort": "GLOBAL_STANDARD",
    "offchainProjectionId": "65a3…ef01"
  }
}

import { createPublicClient, http, parseAbi, decodeAbiParameters } from "viem";
import { base } from "viem/chains";

const EAS = "0x4200000000000000000000000000000000000021" as const;
const SCHEMA_A = "0xf16f6f5c8da93edb3f700c7a5cf2f51bbe738eb1c275a7f5bc7657ef6e27e5a3" as const;

const client = createPublicClient({ chain: base, transport: http() });

const easAbi = parseAbi([
  "function getAttestation(bytes32 uid) view returns (tuple(bytes32 uid, bytes32 schema, uint64 time, uint64 expirationTime, uint64 revocationTime, bytes32 refUID, address recipient, address attester, bool revocable, bytes data))",
]);

const uid = "0x…"; // UID returned by /v2/attestations/brand/:slug

const att = await client.readContract({
  address: EAS,
  abi: easAbi,
  functionName: "getAttestation",
  args: [uid],
});

// att.schema must equal SCHEMA_A; if not, this is a different schema's UID.
if (att.schema !== SCHEMA_A) throw new Error("not a Schema A attestation");

const [brandName, verifiedSince, kybCohort, offchainProjectionId] =
  decodeAbiParameters(
    [
      { name: "brandName", type: "string" },
      { name: "verifiedSince", type: "uint256" },
      { name: "kybCohort", type: "string" },
      { name: "offchainProjectionId", type: "string" },
    ],
    att.data,
  );

const isActive = att.revocationTime === 0n;
console.log({ brandName, verifiedSince, kybCohort, offchainProjectionId, isActive });

import { JsonRpcProvider, Contract, AbiCoder } from "ethers";

const EAS = "0x4200000000000000000000000000000000000021";
const SCHEMA_A = "0xf16f6f5c8da93edb3f700c7a5cf2f51bbe738eb1c275a7f5bc7657ef6e27e5a3";

const provider = new JsonRpcProvider("https://mainnet.base.org");
const eas = new Contract(
  EAS,
  [
    "function getAttestation(bytes32 uid) view returns (tuple(bytes32 uid, bytes32 schema, uint64 time, uint64 expirationTime, uint64 revocationTime, bytes32 refUID, address recipient, address attester, bool revocable, bytes data))",
  ],
  provider,
);

const uid = "0x…";
const att = await eas.getAttestation(uid);
if (att.schema.toLowerCase() !== SCHEMA_A) throw new Error("schema mismatch");

const [brandName, verifiedSince, kybCohort, offchainProjectionId] =
  AbiCoder.defaultAbiCoder().decode(
    ["string", "uint256", "string", "string"],
    att.data,
  );

const isActive = att.revocationTime === 0n;
console.log({ brandName, verifiedSince, kybCohort, offchainProjectionId, isActive });

# Replace UID with the value returned by /v2/attestations/brand/:slug.
cast call 0x4200000000000000000000000000000000000021 \
  "getAttestation(bytes32)((bytes32,bytes32,uint64,uint64,uint64,bytes32,address,address,bool,bytes))" \
  0x9a3cffffffffffffffffffffffffffffffffffffffffffffffffffffffffee01 \
  --rpc-url https://mainnet.base.org

# Decode the `data` field (last element) as the schema payload:
cast abi-decode \
  "x(string,uint256,string,string)" \
  0x…  # the `data` hex from the previous call

query LatestForAttester {
  attestations(
    where: {
      schemaId: { equals: "0xf16f6f5c8da93edb3f700c7a5cf2f51bbe738eb1c275a7f5bc7657ef6e27e5a3" }
      attester: { equals: "0xD5F6FB7b6E71DD7F609b8442951444E5a5C76cce" }
      revoked: { equals: false }
    }
    orderBy: { time: desc }
    take: 50
  ) {
    id
    time
    recipient
    revocationTime
    data
  }
}

query OneByUid {
  attestation(where: { id: "0x9a3c…ee01" }) {
    id
    schemaId
    attester
    recipient
    time
    revocationTime
    data
  }
}