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{-# STDLIB_VERSION 3 #-}
{-# SCRIPT_TYPE ACCOUNT #-}
{-# CONTENT_TYPE DAPP #-}

@Callable(i)
func request (name: String) = {
    # verify the certificate is not in data state yet
    let wasRequested = match getInteger(this, name) { 
        case a: Int => true
        case _ => false

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["a","b","c","d"].indexOf("a")
# >> 0

["a","b","c","d"].contains("a")
# >> true

[1, 2, 3, 4].min()
# >> 1

[1, 2, 3, 4].max()

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let bitcoinId = base58'8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS'
let x = match assetInfo(bitcoinId) {
    case asset:Asset =>
        asset.name # bitcoin
    case _ => throw("Can't find asset")
}

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dApp.widget.initWidget("<recipient>", "WAVES");
dApp.widget.initPurchase(TOTALAMOUNT);

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document.addEventListener("DOMContentLoaded", function() {
    document.querySelector(".data").value = location.href.split("?")[1]
        .replace("%20", " ")
        .replace("%20", " ");
});

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strict z = invoke(dapp, func, args,[AttachedPayment(unit,100000000)])
// invoke(dApp: Address|Alias, function: String, arguments: List[Any], payments: List[AttachedPayments]): Any

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func foo() = {
   ...
   strict balanceBefore = wavesBalance(this).regular
   strict z = invoke(dapp2,bar,args,[AttachedPayment(unit,100000000)])
   strict balanceAfter = wavesBalance(this).regular

   if(balanceAfter < balanceBefore) then ... else...
}

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function sendData() {
    const text = document.querySelector(".data").value;
    let data = text.split("\n");
    data = data.map(function(x) { return {"key": x.split(" ")[0], "value": x, "type": "string"}} );
    const tx = {
        type: 12, // data transaction
        data: {
            data: data,
            fee: {
                "tokens": "0.001",

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# use this JSON to swap EGGs with ledger
# replace "amount": 100, with your amount of EGGlets (1 EGG = 100, 1.01 EGG = 101)

{
  "type": 16,
  "version": 2,
  "dApp": "3PJQUUiJdvz9etUKED9ju7o7VrcNMtnkXBU",
  "call": {
    "args": [],
    "function": "swapEgg"

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// to invoke puzzle swap you will need to broadcast this transaction
// TODO: replace poolAddress (for example "3PPRHHF9JKvDLkAc3aHD3Kd5tRZp1CoqAJa")
// TODO: replace assetInId and assetOutId (for example "4kwKSf4Bx2Wq8YxKnVZBhcEHyXzEtJ2pw7ixfJgirwf2" and "54UszKAj3MtYmkdRCqSXAcaQLaVALBy7CCrVkfmfzhxR")
// TODO: set minToReceive if you want to avoid slippage risk

.invoke({
    dApp: "poolAddress",
    fee: 500000,
    payment: {
        assetId: "assetInId",