chain_getBlock – Mythos JSON-RPC Method

chain_getBlock returns full block data from Mythos, including headers, extrinsics, and justifications. Use it to audit marketplace minting, DAO proposals, or cross-game reward batches.

Parameters

Parameter	Type	Required	Description
blockHash	string	No	Hex-encoded block hash. If omitted, the latest block is returned.

Returns

Standard Substrate block structure with Mythos-specific extrinsics (NFTs, marketplace, multibatching) inside the block.extrinsics array.

Request Example

Fetch block 7,258,942 (0x6ec33e), finalized on 3 October 2025:

{
  "jsonrpc": "2.0",
  "method": "chain_getBlock",
  "params": [
    "0xcc9e2bff6ef4f135b3711c4a6072320660565335d3d1da874df0211e5222147c"
  ],
  "id": 1
}

Response Highlights

{
  "jsonrpc": "2.0",
  "result": {
    "block": {
      "header": {
        "number": "0x6ec33e",
        "parentHash": "0x1c09e6b23b7f7b28f7f4d8b127259db1ce4f20cd0917f51eec18ecf5831f1ec6",
        "stateRoot": "0xfce16b4795ca76aef6ec59943a65afbd261bc644fe102ed27ae807b023128cbb"
      },
      "extrinsics": [
        "0x91bb05010091...",
        "0x2d0284006f26cdb2c3398f2cabaa0bf51d3c8ec3f3cbe75ffb8b9b8853718055517b2497"
      ]
    },
    "justifications": null
  },
  "id": 1
}

The second extrinsic corresponds to nfts.mint, verifying on-chain asset issuance.

Usage Tips

• Pair with chain_getBlockHash for pagination when syncing event data.
• Monitor block time (~6 seconds) to tune polling intervals for live leaderboards.
• Trigger retries when justifications is null; Mythos finality arrives from Polkadot GRANDPA.