Fix bug in coin's state hadnling which caused crash on double spend

hexresearch / hschain

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Fix bug in coin's state hadnling which caused crash on double spend #676

Closed Shimuuar closed 4 years ago

Shimuuar commented 4 years ago

Short: query condition indbLookupUTXO was wrong so double spend transaction was provisionally accepted and consequent write crashed due to constraint violations. Also PR contains:

Tests for coin state transitions
Orphans for working with database using coin types