Selection of cryptographic identifiers in a block

A filter node system comprising:

• a pool of hashing processors executing a filter node protocol and configured to receive, via a network interface, a plurality of events each associated with a cryptographic identifier, wherein the pool of hashing processors are configured to generate a block data structure that is appended to a blockchain data structure, the block data structure based on a subset of the plurality of events;
• a filter node mempool associated with the pool of hashing processors, the filter node mempool storing the plurality of events, wherein at least a portion of the plurality of events were received by the filter node mempool from a non-filter node mempool;
• a memory including a predetermined list of cryptographic identifiers and filter node protocol instructions that when executed cause the hashing processors to sort the plurality of events based on each respective cryptographic identifier associated with the plurality of events, wherein the sorting identifies events of the plurality of events to include in the subset where those events associated with the predetermined list of cryptographic identifiers are selectively excluded from the subset, and the instructions further cause the hashing processors to generate the block data structure based on the subset, wherein the block data structure is compatible with a blockchain network populated by the filter node and non-filter nodes, and wherein the memory further includes instructions that when executed delete events associated with the predetermined list of cryptographic identifiers from the filter node mempool in response to the association of those events with the predetermined list of cryptographic identifiers, thereby preventing propagation of the those events from the filter node mempool to other mempools;
• and
• a network interface configured to append the block data structure to the blockchain data structure of the blockchain network populated by the filter node and non-filter nodes.

A computer-readable storage medium storing instructions that, when executed by a computing system, cause the computing system to perform a process comprising:

• receiving, by hashing processors of a filter node from a non-filter node mempool, a plurality of events each associated with a cryptographic identifier, wherein the hashing processors are configured to generate a block data structure that is appended to a blockchain data structure, the block data structure based on a subset of the plurality of events;
• sorting the plurality of events based on each respective cryptographic identifier associated with each respective event of the plurality of events, wherein said sorting identifies events of the plurality of events to include in the subset where those events associated with a predetermined list of cryptographic identifiers are selectively excluded from the subset;
• in response to association of events in a filter node mempool with the predetermined list of cryptographic identifiers, deleting those events from the filter node mempool;
• propagating of events present in the filter node mempool post-deletion to other mempools;
• generating, by the hashing processors, the block data structure based on the subset, wherein the block data structure is compatible with a blockchain network populated by the filter node and non-filter nodes;
• and
• appending the block data structure to the blockchain network populated by the filter node and non-filter nodes.