Update mempool asynchronously when processing a new block

[kushti]

Current mempool update logic in ErgoNodeViewHolder :

                  val newMemPool = if (almostSynced) {
                    updateMemPool(progressInfo.toRemove, blocksApplied, memoryPool())
                  } else {
                    memoryPool()
                  }

and it can be called asynchronously

[anujmax]

hi @kushti , is this issue still relevant? Can I work on this?

[kushti]

hi @kushti , is this issue still relevant? Can I work on this?

Hi, sure, please take it!

[anujmax]

hi @kushti, sorry I got busy with other projects.