Calculate static rewards by getting start balance from the block before

[Bushstar]

Summary

• The start block for static rewards should be from one before rewards are paid, this gives a start balance to calculate the difference from. Otherwise an address updated via accounttoaccount or some other means on a block with a reward then does not show that reward.

Implications

• Storage

  • Database reindex required
  • Database reindex optional
  • Database reindex not required
  • None

• Consensus

  • Network upgrade required
  • Includes backward compatible changes
  • Includes consensus workarounds
  • Includes consensus refactors
  • None