author_submitExtrinsic

Submits a signed SCALE-encoded extrinsic to the Manta Atlantic transaction pool. Returns the extrinsic hash on success.

Parameters

Parameter	Type	Required	Description
extrinsic	string	Yes	Hex-encoded, signed extrinsic payload.

Returns

• result: Hex-encoded hash of the included extrinsic.

Usage Scenarios

• Mint zkSBT credentials or publish revocations via dedicated runtime pallets.
• Broadcast private asset transfers that rely on zkAddress proofs.

Request Example

{
 "jsonrpc": "2.0",
 "method": "author_submitExtrinsic",
 "params": [
 "0x450284008eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a48"
 ],
 "id": 1
}

Code Example (@polkadot/api)

import { ApiPromise, WsProvider, Keyring } 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 keyring = new Keyring({ type: 'sr25519' });
const issuer = keyring.addFromUri('//IssuerSeed');

const tx = api.tx.zksbt.mintPrivate(
 schemaId,
 recipientCommitment,
 proofBytes,
 expiry
);

const hash = await tx.signAndSend(issuer);
console.log('zkSBT submitted with hash', hash.toHex());

Error Handling

Code	Meaning	Mitigation
1010	Bad signature or payload	Re-sign with correct metadata version.
-32010	Pool is full	Retry after monitoring pending queue.
-32602	Invalid params	Check that the extrinsic is SCALE-encoded and signed.

Monitor author_pendingExtrinsics to track queue length before submitting large batches.