Here is an article about the format of block key content in Bitcoind’s LevelDB:

Understanding the Format of Block Key Content in Bitcoind’s LevelDB

When working with Bitcoind’s LevelDB block index files, it is important to understand the format of block keys and their content. This is crucial for efficiently searching for specific blocks in the database.

What are block keys?

Block keys, also known as block IDs or block numbers, are unique identifiers assigned to each block in the Bitcoin blockchain. They serve as tags that help Bitcoind identify which block to process next during the block validation and verification process.

Block Key Content Format

The block key content format is typically represented by a 64-bit integer (8 bytes) that contains various fields, including:

• 0x01: A bit flag indicating whether the block key is valid

• 0x00-0x7F: Additional information about the block, such as its timestamp and/or other metadata

The more commonly used block key content format in Bitcoind’s LevelDB is:

0x01 (validity)
| 0x00 0x00 0x00 0x00 (timestamp) 
seconds since the start of the epoch
| 0x01 (metadata, e.g. timestamp, size, etc.)
0x08-0x07 (block ID, 64-bit integer)
0x00-0x7F (additional metadata or flags)

Byte position of specific blocks

To find the byte position of specific blocks in the database, you can use the blk field in the block key content. This field indicates the starting address of a block.

For example, if you have a block key with a validity flag of 0x01 and metadata indicating a block ID of 0x12345678, the byte position of that particular block would be:

0x08-0x07 (block ID: 0x12345678) 
start address

Example use case

Let’s say you want to search for a specific block in the database. You can create a blk field with the desired byte position and metadata, such as:

blk00029.dat | 0x01 (validity) | 0x08-0x07 (block id: 0x12345678)

You can then use Bitcoind’s LevelDB command line tool (bitcoind -db path/to/db -query blk00029.dat | grep block_id:0x12345678) to search for the specified block.

By understanding the format of the block key content and using the blk field with the desired byte position, you can efficiently find specific blocks in Bitcoind’s LevelDB database.

Fantom Economic Indicators Fundamental Assessment