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POST
/
66f812de2a6724a75a51f60dd6f2a154
debug_printBlock
curl --request POST \
  --url https://nd-954-882-037.p2pify.com/66f812de2a6724a75a51f60dd6f2a154 \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "debug_printBlock",
  "params": [
    30000000
  ]
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}
Arbitrum API method that returns a human-readable representation of a block. Unlike eth_getBlockByNumber which returns structured JSON, this method returns a verbose text dump of the entire block structure including all header fields, transactions, and uncles. The output format uses Go’s spew.Sdump formatting.
Learn how to deploy a node with the debug and trace API methods enabled.
This method is available for post-Nitro blocks only (block 22,207,815 and later). For pre-Nitro blocks, use the arbtrace_* methods instead.
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​
Parameters

  • number — the block number as a decimal integer.

​
Response

  • result — a human-readable string representation of the block, including all internal fields and nested structures.

​
debug_printBlock code examples

const ethers = require('ethers');
const NODE_URL = "YOUR_CHAINSTACK_ENDPOINT";
const provider = new ethers.JsonRpcProvider(NODE_URL);

const debugPrintBlock = async (blockNumber) => {
  const result = await provider.send("debug_printBlock", [blockNumber]);
  console.log(result);
};

debugPrintBlock(30000000);

​
Use case

The debug_printBlock method is useful for quick debugging when you need a comprehensive view of a block’s internal structure. The human-readable output format reveals all fields including those not typically exposed by standard RPC methods, making it valuable for diagnosing block-level issues and understanding the complete block composition.

Body

application/json
​
id
integer
default:1
​
jsonrpc
string
default:2.0
​
method
string
default:debug_printBlock
​
params
integer[]

The block number as a decimal integer.

Response

200 - application/json

Returns a human-readable representation of the block.

​
jsonrpc
string
​
id
integer
​
result
string
Last modified on March 13, 2026