Implement transaction cycles/threads about eos HOT 3 CLOSED

Output transactions are assigned 32-bit serial number IDs at the end of each cycle. To include an output transaction from a previous cycle as an input transaction in a current cycle, reference its ID.

This is no longer the case. The use of 32-bit serial numbers proved too cumbersome: the added complexity of assigning the numbers correctly, avoiding synchronization problems with output transactions being generated in parallel, and most of all implementing signed_block::merkle_root() without having access to either the full transactions or their hashes... It is all around simpler, albeit slightly more expensive in time and space, to use full hashes.

from eos.

cleaning up old assignments

from eos.

cycles/threads have been replaced by Inter Blockchain Communication. See https://medium.com/eosio/introducing-eosio-dawn-4-0-f738c552879

from eos.