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onchainid.getClaim(GetClaim)

Fetch a claim from an ONCHAINID identity by claimId. This is a read-only call to the identity contract.

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GetClaim Type Parameters

ParameterTypeRequiredDescription
subjectIdentitystringRequiredThe ONCHAINID identity contract address to read from.
claimIdstringRequiredThe claim identifier, computed as keccak256(abi.encode(issuer, topic)).
Note: The claimId is derived from the issuer contract address and the claim topic to uniquely identify a claim on an identity. In Solidity this is keccak256(abi.encode(_issuer, _topic)). In ethers you can compute it via keccak256(new AbiCoder().encode(["address","uint256"], [issuer, topic])).

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Returns

FieldTypeDescription
claimClaimThe full claim payload read from the identity contract.

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Usage

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TypeScript

import 'dotenv/config';
import { RWA, Chain, ClaimTopics, type SDKInit, type GetIdentity, type GetClaim } from '@peaq-network/rwa';
import { JsonRpcProvider, AbiCoder, keccak256 } from "ethers";

async function main() {
    // 0. Create rwa_sdk instance and get provider
    const provider = new JsonRpcProvider(process.env.HTTPS_BASE_URL);
    const init: SDKInit = { chainId: Chain.AGUNG, provider: provider };
    const rwa_sdk = new RWA(init);

    // 1. Resolve the identity for an EOA (or use a known identity address)
    const alice = process.env.ALICE_PUBLIC_ADDRESS!;
    const identityRes = await rwa_sdk.onchainid.getIdentity({ subject: alice } as GetIdentity);
    if (identityRes.status !== 'found') throw new Error('Identity not found');
    const identity = identityRes.identity;

    // 2. Compute claimId = keccak256(abi.encode(issuer, topic))
    const issuerContract = process.env.CLAIM_ISSUER_CONTRACT_ADDRESS!;
    const topic = ClaimTopics.CT_KYC_APPROVED;
    const abiCoder = new AbiCoder();
    const claimId = keccak256(abiCoder.encode(["address", "uint256"], [issuerContract, topic]));

    // 3. Fetch claim
    const result = await rwa_sdk.onchainid.getClaim({
      subjectIdentity: identity,
      claimId
    } as GetClaim);
    console.log("Result", result);
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});

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JavaScript

import 'dotenv/config';
import { RWA, Chain, ClaimTopics } from "@peaq-network/rwa";
import { JsonRpcProvider, AbiCoder, keccak256 } from "ethers";

async function main() {
    // 0. Create rwa_sdk instance and get provider
    const provider = new JsonRpcProvider(process.env.HTTPS_BASE_URL);
    const rwa_sdk = new RWA({ chainId: Chain.AGUNG, provider: provider });

    // 1. Resolve the identity for an EOA (or use a known identity address)
    const alice = process.env.ALICE_PUBLIC_ADDRESS;
    const identityRes = await rwa_sdk.onchainid.getIdentity({ subject: alice });
    if (identityRes.status !== 'found') throw new Error('Identity not found');
    const identity = identityRes.identity;

    // 2. Compute claimId = keccak256(abi.encode(issuer, topic))
    const issuerContract = process.env.CLAIM_ISSUER_CONTRACT_ADDRESS;
    const topic = ClaimTopics.CT_KYC_APPROVED;
    const abiCoder = new AbiCoder();
    const claimId = keccak256(abiCoder.encode(["address", "uint256"], [issuerContract, topic]));

    // 3. Fetch claim
    const result = await rwa_sdk.onchainid.getClaim({
      subjectIdentity: identity,
      claimId: claimId
    });
    console.log("Result", result);
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});

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Example outputs

Result {
  claim: {
    topic: ClaimTopics.CT_KYC_APPROVED,
    scheme: 1,
    issuer: '0x187EB39e1aF4B9a79936635dBa52984af98464a9',
    signature: '0x4bab329329ea682e4ac675d9ebab2b8ec597124b98b5085a4e8f83104ce064d4728771567752a75db8ad75552579f0f805913f1f756947f25a8e85d67ce3055e1b',
    data: '0x252ec8044814d556905cc1587f4a375a2acfe3f84a17d7d104accd32ee25b3b6',
    uri: 'https://example.com/kyc'
  }
}