Method for calculating confirmation reliability for blockchain based transaction and blockchain network monitoring system for performing the method

A blockchain network monitoring system comprising:

• a plurality of blockchain nodes which is a member of a blockchain network, distributes and manages blockchain data, generates a new block, and propagates the new block onto the blockchain network;
• a monitoring node which is a member of the blockchain network and monitors new blocks propagated onto the blockchain network in real time;
• and
• a blockchain network monitoring apparatus which receives information on the new block from the monitoring node in real time, and monitors an occurrence state of a branch on the blockchain data, based on the information on the new block.

An apparatus for calculating transaction confirmation reliability comprising:

• a hardware processor;
• a network interface;
• a memory configured to load a computer program executed by the hardware processor;
• and
• a storage configured to store the computer program,
• wherein the computer program which, when executed by the hardware processor, causes the hardware processor to perform operations including:
• acquiring information on a branch formed on blockchain data;
• calculating a difference in a block height between a target block corresponding to a current block height of the blockchain data and a block in a non-branched state based on the information on the branch;
• and
• calculating a transaction confirmation reliability of transaction data recorded in the target block based on the difference in the block height,
• wherein the transaction confirmation reliability indicates a probability that, as k blocks are further connected after the target block, a block position at which the transaction data is recorded will not change, wherein k is an integer greater than zero.