state_getStorage

Reads a storage key from the latest state (or a given block) on Manta Atlantic.

Parameters

Parameter	Type	Required	Description
key	string	Yes	Hex-encoded SCALE storage key.
at	string	No	Block hash to query a historical state.

Returns

• result: Hex-encoded SCALE bytes representing the stored value.

Storage Targets

Use Case	Description
Credential registries	Fetch zkSBT schema metadata and issuer records for compliance audits.
Note commitment roots	Keep zkAddress wallets synchronized with the shielded UTXO tree.
Revocation lists	Monitor nullifiers to invalidate expired credentials.

Request Example

{
 "jsonrpc": "2.0",
 "method": "state_getStorage",
 "params": [
 "0x26aa394eea5630e07c48ae0c9558cef702a5c1b19e4fce3d99a4c1796f6ce3ac",
 "0x1f4c2a8f6815485a1a5e14f953fa6e533659d21a9b2d4399d5c66a1a1a1f9e3b"
 ],
 "id": 1
}

Code Example (@polkadot/api)

import { ApiPromise, WsProvider } from '@polkadot/api';

const provider = new WsProvider('wss://api-manta-atlantic-mainnet.n.dwellir.com/YOUR_API_KEY');
const api = await ApiPromise.create({ provider });

const storageKey = api.query.zksbt.schemas.key('IssuerId', 'CredentialId');
const value = await api.rpc.state.getStorage(storageKey.toHex());
console.log('Schema metadata bytes', value);

Tips

• Use state_getStorage at finalized block hashes when generating compliance reports to ensure deterministic proofs.
• Combine with state_getStorageHash to detect state changes before re-processing large registries.

Errors

Code	Meaning
-32602	Invalid params (missing key)
-32000	Storage entry not found

Retry with backoff and confirm the key exists in the current runtime metadata.