onchainid.getClaim(GetClaim)
Fetch a claim from an ONCHAINID identity by claimId. This is a read-only call to the identity contract.
GetClaim Type Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| subjectIdentity | string | Required | The ONCHAINID identity contract address to read from. |
| claimId | string | Required | The claim identifier, computed as keccak256(abi.encode(issuer, topic)). |
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])).
Returns
| Field | Type | Description |
|---|---|---|
| claim | Claim | The full claim payload read from the identity contract. |
Usage
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);
});
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);
});
Example outputs
Result {
claim: {
topic: ClaimTopics.CT_KYC_APPROVED,
scheme: 1,
issuer: '0x187EB39e1aF4B9a79936635dBa52984af98464a9',
signature: '0x4bab329329ea682e4ac675d9ebab2b8ec597124b98b5085a4e8f83104ce064d4728771567752a75db8ad75552579f0f805913f1f756947f25a8e85d67ce3055e1b',
data: '0x252ec8044814d556905cc1587f4a375a2acfe3f84a17d7d104accd32ee25b3b6',
uri: 'https://example.com/kyc'
}
}