message: negative rewards
diff: @@ -31,7 +31,7 @@ class Staking(Rule):
  ($2::integer - _block_number::integer) / $4::float as compounding_rate,
  from {token_holder_table}
  where _block_number::integer < $2::integer
  - and token = 'card'
  + and token = $3::text
  and safe is not null
  qualify
  _block_number::integer >= $1::integer
  