chain_getBlock

Fetches a full Manta Atlantic block, including header, extrinsics, and justification data. When params is empty, the latest block is returned.

Parameters

Parameter	Type	Required	Description
blockHash	string	No	Hex-encoded block hash. When omitted, returns the most recent block.

Returns

The method returns a JSON object with the following fields:

Field	Type	Description
block	object	Full block data, including header and extrinsics.
block.header	object	Contains parent hash, number, state root, extrinsics root, and digest.
block.extrinsics	array	List of SCALE-encoded extrinsics in the block.
justifications	array or null	Finality proofs (GRANDPA) when available.

Reference: Substrate JSON-RPC Specification.

Request Example

{
 "jsonrpc": "2.0",
 "method": "chain_getBlock",
 "params": [
 "0x3b5dcb0d26f0a21cb88d5df4fe7e88f7a8e50a6b9c6e3a57306d98e010ce4081"
 ],
 "id": 1
}

Response Example

{
 "jsonrpc": "2.0",
 "result": {
 "block": {
 "header": {
 "number": "0x1c22e0",
 "parentHash": "0xaf1dfe5de408f13ec3b54d2797dd934c7b3f54a1b53a6a2d4538af5c4c4c9b47",
 "stateRoot": "0x9c58d8b2eaf5a19eb712f27a7ed8a24c0b345f0f8524ff4e0c28c908276d1f7c",
 "extrinsicsRoot": "0x682cdf1cd83fba629a506d9fe7839f5a9f87d86161b9e27e4d75fab9c966cf39"
 },
 "extrinsics": [
 "0x280402000b50cd548d8501",
 "0x450284008eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a48"
 ]
 },
 "justifications": null
 },
 "id": 1
}

Usage Scenarios

• Index zkSBT issuance extrinsics for compliance dashboards and revocation tracking.
• Monitor zkAddress note commitments to keep off-chain wallets synchronized.

Code Examples

cURL

curl https://api-manta-atlantic-mainnet.n.dwellir.com/YOUR_API_KEY \
 -H 'Content-Type: application/json' \
 -d '{
 "jsonrpc": "2.0",
 "method": "chain_getBlock",
 "params": [],
 "id": 1
 }'

JavaScript (fetch)

export async function getBlock(blockHash) {
 const body = {
 jsonrpc: '2.0',
 method: 'chain_getBlock',
 params: blockHash ? [blockHash] : [],
 id: 1,
 };

 const res = await fetch('https://api-manta-atlantic-mainnet.n.dwellir.com/YOUR_API_KEY', {
 method: 'POST',
 headers: { 'Content-Type': 'application/json' },
 body: JSON.stringify(body),
 });

 if (!res.ok) throw new Error('Failed to fetch block');
 return res.json();
}

Python (requests)

import json
import requests

def chain_get_block(block_hash=None):
 payload = {
 "jsonrpc": "2.0",
 "method": "chain_getBlock",
 "params": [block_hash] if block_hash else [],
 "id": 1
 }

 response = requests.post(
 "https://api-manta-atlantic-mainnet.n.dwellir.com/YOUR_API_KEY",
 headers={"Content-Type": "application/json"},
 data=json.dumps(payload),
 timeout=10
 )
 response.raise_for_status()
 return response.json()

Error Codes

Code	Meaning
-32602	Invalid params (e.g., malformed hash)
-32002	Resource temporarily unavailable (node restarting)

Handle errors by retrying with exponential backoff and verifying the block hash exists.