How-To-Get-Block-Information

Goal

Query infomation about a block.

Before you begin

Make sure to meet the following requirements:

• Familiarize with the cleos get block command and its parameters.
• Install the currently supported version of cleos.

Note

cleos is bundled with the Antelope software. Installing Antelope will also install cleos.

• Understand what a block is and its role in the blockchain.
• Understand the block lifecycle in the Antelope consensus protocol.

Steps

Perform the step below:

Retrieve full information about a block:

cleos get block <block_number_or_id>

Where block_number_or_id is the specified block number or block ID.

Some examples are provided below:

• Query the testnet to retrieve full block information about block number 48351112 or block ID 02e1c7888a92206573ae38d00e09366c7ba7bc54cd8b7996506f7d2a619c43ba:

Example Output

cleos -u https://choiceofyourprovider get block 48351112

Reference to testnet providers

{
  "timestamp": "2021-01-28T17:58:59.500",
  "producer": "inith",
  "confirmed": 0,
  "previous": "02e1c78787ff4d4ce6124831b936bb4ef6015e470868a535f1c6e04f3afed8a1",
  "transaction_mroot": "0000000000000000000000000000000000000000000000000000000000000000",
  "action_mroot": "1bf9d17b5a951cbb6d0a8324e4039744db4137df498abd53046ea26fa74d73c9",
  "schedule_version": 1,
  "new_producers": null,
  "producer_signature": "SIG_K1_JxFfxGA1wZx9LCVjbrBb5nxTuJai7RUSiwRXyY866fYvZZyRtdmQFn9KJCqVHFAiYEsJpDb6dhTmHNDwipJm4rDiyhEmGa",
  "transactions": [],
  "id": "02e1c7888a92206573ae38d00e09366c7ba7bc54cd8b7996506f7d2a619c43ba",
  "block_num": 48351112,
  "ref_block_prefix": 3493375603
}

• Query the testnet to retrieve full block information about block ID 02e1c7888a92206573ae38d00e09366c7ba7bc54cd8b7996506f7d2a619c43ba:

Example Output

cleos -u https://choiceofyourprovider get block 02e1c7888a92206573ae38d00e09366c7ba7bc54cd8b7996506f7d2a619c43ba

{
  "timestamp": "2021-01-28T17:58:59.500",
  "producer": "inith",
  "confirmed": 0,
  "previous": "02e1c78787ff4d4ce6124831b936bb4ef6015e470868a535f1c6e04f3afed8a1",
  "transaction_mroot": "0000000000000000000000000000000000000000000000000000000000000000",
  "action_mroot": "1bf9d17b5a951cbb6d0a8324e4039744db4137df498abd53046ea26fa74d73c9",
  "schedule_version": 1,
  "new_producers": null,
  "producer_signature": "SIG_K1_JxFfxGA1wZx9LCVjbrBb5nxTuJai7RUSiwRXyY866fYvZZyRtdmQFn9KJCqVHFAiYEsJpDb6dhTmHNDwipJm4rDiyhEmGa",
  "transactions": [],
  "id": "02e1c7888a92206573ae38d00e09366c7ba7bc54cd8b7996506f7d2a619c43ba",
  "block_num": 48351112,
  "ref_block_prefix": 3493375603
}