Function top_block_height

pub fn top_block_height(
    table_block_heights: &impl DatabaseRo<BlockHeights>,
) -> Result<BlockHeight, RuntimeError>

Retrieve the height of the top block.

This returns the height of the top block, not the chain_height.

For example:

• The blockchain has 0 blocks => this returns Err(RuntimeError::KeyNotFound)
• The blockchain has 1 block (height 0) => this returns Ok(0)
• The blockchain has 2 blocks (height 1) => this returns Ok(1)

Note that in cases where no blocks have been written to the database yet, an error is returned: Err(RuntimeError::KeyNotFound).

Errors

This function returns RuntimeError::KeyNotFound if the input (if applicable) doesn’t exist or other RuntimeError’s on database errors.