Tx replacement policy

[akumaigorodski]

Currently max bitAssets block size is defined to be 10Mb so in theory a fee market may happen because block space is limited. OTOH there is no tx replacement policy like RBF on L1 so during congestion a tx may stay in mempool indefinitely without a clear way out.

Is this intentional? If no, I think replacing by fee is a useful thing and I can add it while working on other stuff here. If it is intentional then OK also and I won't bother.

[akumaigorodski]

Tx replacement is probably a bad direction, large/growing block size is a simpler one both for developers and users and something we can afford on a sidechain.

[akumaigorodski]

Note: some kind of minimal fee policy is probably required, otherwise an attacker could blow an UTXO set up for free.