Management of snapshot in blockchain

A computer program product having instructions embodied on a non-transitory computer-readable storage medium or programmable circuitry, the instructions executable by a processor or the programmable circuitry, respectively, to cause the processor or the programmable circuitry to perform operations comprising:

• obtaining, from at least one first node from a plurality of first nodes, a difference between a common data at a first time point and the common data at a second time point that is different from the first time point;
• generating a first snapshot of the common data at the first time point based on the difference;
• obtaining a hash of the common data at the first time point from at least one of the plurality of first nodes;
• and
• verifying the first snapshot at the first time point with the hash of the common data at the first time point.