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update fomo.ride #43

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update fomo.ride #43

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35 changes: 21 additions & 14 deletions ride4dapps/fomo.ride
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
# FOMO - Fear of missing out - is a game
# users send Waves to the FOMO account. each payment has to be bigger than the previous one
# if there are no payments in the last 24 hours, the last transaction owner can withdraw the full bank

{-# STDLIB_VERSION 3 #-}
{-# CONTENT_TYPE DAPP #-}
{-# SCRIPT_TYPE ACCOUNT #-}
Expand All @@ -9,23 +13,25 @@ let day = 1440

@Callable(i)
func fearmissing() = {
let payment = match i.payment {
case p:AttachedPayment =>
# this function can be used by anyone to place a bet
# user has to attach a Waves payment to the script invokation
let payment = match i.payment {
case p:AttachedPayment =>
match p.assetId {
case assetId: ByteVector => throw("fomo waves only")
case assetId: ByteVector => throw("fomo waves only") # waves-only threshold
case _ => p.amount
}

case _ => throw("payment must be attached")
}
let lastPayment = match getInteger(this, "lastPayment") {
case _ => throw("payment must be attached")
}
let lastPayment = match getInteger(this, "lastPayment") { # reading the last payment value from the FOMO account state
case p:Int => p
case _ => 0
}

if(payment <= lastPayment)
then throw("min payment is " +toString(payment))
else # storing best payment, caller and height
then throw("min payment is " +toString(lastPayment)) # the new payment must be bigger than the previous one
else # storing best payment, caller and actual blockchain height
WriteSet([
DataEntry(lpKey, payment),
DataEntry(liKey, i.caller.bytes),
Expand All @@ -35,11 +41,12 @@ func fearmissing() = {

@Callable(i)
func withdraw() = {
let callerCorrect = i.caller.bytes == extract(getBinary(this, liKey))
let heightCorrect = extract(getInteger(this, lhKey)) - height >= day
let canWithdraw = heightCorrect && callerCorrect
# this function is used by the FOMO winner to withdraw the full balance
let callerCorrect = i.caller.bytes == extract(getBinary(this, liKey)) # is caller the winner?
let heightCorrect = extract(getInteger(this, lhKey)) - height >= day # are there no more bets in the last 24 hours?
let canWithdraw = heightCorrect && callerCorrect # are both variables true?

if (canWithdraw)
then TransferSet([ScriptTransfer(i.caller, wavesBalance(this), unit)])
else throw("behold")
then TransferSet([ScriptTransfer(i.caller, wavesBalance(this), unit)]) # send full balance to the winner
else throw("This user can not withdraw the balance in this moment")
}