71 lines
2.0 KiB
Plaintext
71 lines
2.0 KiB
Plaintext
type state is
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record
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goal : nat;
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deadline : timestamp;
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backers : map (address, nat);
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funded : bool
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end
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entrypoint contribute (storage store : state;
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const sender : address;
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const amount : mutez)
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: state * list (operation) is
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var operations : list (operation) := []
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begin
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if now > store.deadline then
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fail "Deadline passed"
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else
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match store.backers[sender] with
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None ->
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store :=
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copy store with
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record
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backers = add_binding ((sender, amount), store.backers)
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end
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| _ -> skip
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end
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end with (store, operations)
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entrypoint withdraw (storage store : state; const sender : address)
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: state * list (operation) is
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var operations : list (operation) := []
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begin
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if sender = owner then
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if now >= store.deadline then
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if balance >= store.goal then
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begin
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store := copy store with record funded = True end;
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operations := [Transfer (owner, balance)]
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end
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else fail "Below target"
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else fail "Too soon"
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else skip
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end with (store, operations)
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entrypoint claim (storage store : state; const sender : address)
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: state * list (operation) is
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var operations : list (operation) := []
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var amount : mutez := 0
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begin
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if now <= store.deadline then
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fail "Too soon"
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else
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match store.backers[sender] with
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None ->
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fail "Not a backer"
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| Some (amount) ->
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if balance >= store.goal || store.funded then
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fail "Cannot refund"
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else
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begin
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amount := store.backers[sender];
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store :=
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copy store with
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record
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backers = remove_entry (sender, store.backers)
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end;
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operations := [Transfer (sender, amount)]
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end
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end
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end with (store, operations)
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