The SQS seeder and the Poller seeder are removed, they weren't
adapted to the linear synchronization process and they are not
required anymore.
Also, all related classes and dependencies that where used by
these tasks were removed too.
This is a piece for #18, we need to retrieve paginated transactions for a given
address.
NOTE: This commit doesn't include tests in order to work in the frontend
concurrently, tests will be included before the release.
The trait is implemented by TransactionPostgresDataHandler and
TransactionPostgresDataHandler.
This is a piece for creating endpoints interacting with transactions
from the database instead of the xsn service.
When a block is processed, in case it can't be fully retrieved from the
rpc server, the block is ignored.
When a block is processed, if there is an existing block having the same
height, it will be replaced by the new one.
This is a part for fixing the bug #6
Alexis Hernandez