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Lars Brünjes 2021-05-26 11:48:18 +02:00
parent 64d795fbb2
commit 7d03111171
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1 changed files with 17 additions and 4 deletions
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21
code/week08/src/Week08/TokenSale.hs
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@ -66,16 +66,29 @@ lovelaces = Ada.getLovelace . Ada.fromValue
transition :: TokenSale -> State Integer -> TSRedeemer -> Maybe (TxConstraints Void Void, State Integer)
transition ts s r = case (stateValue s, stateData s, r) of
(v, _, SetPrice p) | p >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
, State p (v <> nft (negate 1))
, State p $
v <>
nft (negate 1)
)
(v, p, AddTokens n) | n > 0 -> Just ( mempty
, State p $ v <> nft (negate 1) <> assetClassValue (tsToken ts) n
, State p $
v <>
nft (negate 1) <>
assetClassValue (tsToken ts) n
)
(v, p, BuyTokens n) | n > 0 -> Just ( mempty
, State p $ v <> nft (negate 1) <> assetClassValue (tsToken ts) (negate n) <> lovelaceValueOf (n * p)
, State p $
v <>
nft (negate 1) <>
assetClassValue (tsToken ts) (negate n) <>
lovelaceValueOf (n * p)
)
(v, p, Withdraw n l) | n >= 0 && l >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
, State p $ v <> nft (negate 1) <> assetClassValue (tsToken ts) (negate n) <> lovelaceValueOf (negate l)
, State p $
v <>
nft (negate 1) <>
assetClassValue (tsToken ts) (negate n) <>
lovelaceValueOf (negate l)
)
_ -> Nothing
where