Blockchain By Example

Checkpoints

The Bitcoin Core client has hardcoded checkpoints verifying that certain specific blocks should be found at certain heights. They are regularly added in new versions of the client to avoid accepting any forks from the network prior to the last checkpoint, thereby making transactions irreversible.

As our blockchain doesn't have previous blocks, you have to disable these checkpoints for Readercoin, otherwise your node will not be able to construct additional blocks nor start mining, as it will be waiting for non-existent blocks.

In the chainparams.cpp file, locate the checkpointData map:

The map stores a collection of preset checkpoints ...