Noob cannot deploy smart contract

1

Hi, I decided to create a simple web interface that uses myalgo connect to deploy smart contracts.

I get this error when deploying the contract:

Received status 400: TransactionPool.Remember: transaction XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX: logic eval error: gtxn lookup TxnGroup[1] but it only has 1. Details: pc=62, opcodes=pushint 3
==
gtxn 1 Amount

I’m not sure what this error is about.
Thanks.

2

Your smart contract expects a group of two transactions and inspect the amount of the second transactions.

See Atomic transfers - Algorand Developer Portal for group transaction / atomic transfers.
See Build with Python - Algorand Developer Portal for a tutorial on smart contracts.

3

Thanks fabrice, but I have tried so many things and it hasn’t worked.

My pyteal is

from pyteal import *

def teal():    
    
    # deposit 
    deposit = Seq(
        App.localPut(Txn.sender(), Bytes("AmountDeposited"), Gtxn[0].asset_amount()),
        App.localPut(Txn.sender(), Bytes("TimeDepositedUnix"), Global.latest_timestamp()),
        Return(Int(1))
    )

    def claim():
        return Seq([
                # then
                Assert((App.localGet(Txn.sender(), Bytes("TimeDepositedUnix")) - Global.latest_timestamp()) % Int(86400) > Int(0)),
                InnerTxnBuilder.Begin(),
                InnerTxnBuilder.SetFields(
                    {
                        TxnField.type_enum: TxnType.AssetTransfer,
                        TxnField.xfer_asset: Int(75312966),
                        TxnField.asset_amount: (App.localGet(Txn.sender(), Bytes("AmountDeposited")) * ((App.localGet(Txn.sender(), Bytes("TimeDepositedUnix")) - Global.latest_timestamp()) % Int(86400)) * Int(10)) / Int(10),
                        TxnField.sender: Global.current_application_address(),
                        TxnField.receiver: Txn.sender(),
                        TxnField.fee: Global.min_txn_fee()
                    }
                ),
                InnerTxnBuilder.Submit(),
                Return(Int(1))
            ])
    
    def withdraw():
        return Seq([
            InnerTxnBuilder.Begin(),
            InnerTxnBuilder.SetFields(
                {
                    TxnField.type_enum: TxnType.AssetTransfer,
                    TxnField.xfer_asset: Int(552767025),
                    TxnField.asset_amount: App.localGet(Txn.sender(), Bytes("AmountDeposited")),
                    TxnField.sender: Global.current_application_address(),
                    TxnField.receiver: Txn.sender(),
                    TxnField.fee: Global.min_txn_fee()
                }
            ),
            InnerTxnBuilder.Submit(),
            Return(Int(1))
        ])

    def optin():
        return Seq([
            Seq([
                InnerTxnBuilder.Begin(),
                InnerTxnBuilder.SetFields(
                    {
                        TxnField.type_enum: TxnType.AssetTransfer,
                        TxnField.xfer_asset: Int(75313288),
                        TxnField.asset_amount: Int(0),
                        TxnField.sender: Global.current_application_address(),
                        TxnField.receiver: Global.current_application_address(),
                        TxnField.fee: Global.min_txn_fee()
                    }
                ),
                InnerTxnBuilder.Submit(),
                Return(Int(1))
            ]),

            Seq([
                InnerTxnBuilder.Begin(),
                InnerTxnBuilder.SetFields(
                    {
                        TxnField.type_enum: TxnType.AssetTransfer,
                        TxnField.xfer_asset: Int(75312966),
                        TxnField.asset_amount: Int(0),
                        TxnField.sender: Global.current_application_address(),
                        TxnField.receiver: Global.current_application_address(),
                        TxnField.fee: Global.min_txn_fee()
                    }
                ),
                InnerTxnBuilder.Submit(),
                Return(Int(1))
            ])
        ])

    
    # Check what action is being completed
    conditions = Cond(
        # check if create txn
        [Global.current_application_id() == Int(0), Return(Int(1))],
        # is deposit transaction
        [And(Global.group_size() == Int(3), Gtxn[0].asset_amount() >= Int(1000000), Gtxn[0].xfer_asset() == Int(75313288), Gtxn[1].amount() == Global.min_txn_fee()), deposit],
        # is claim transaction
        [And(Global.group_size() == Int(2), Gtxn[0].amount() == Global.min_txn_fee(), Gtxn[1].type_enum() == TxnType.ApplicationCall), claim()],
        # is withdraw transaction
        [Txn.type_enum() == TxnType.ApplicationCall, withdraw()],
        # is contract asset opt-in transaction
        [And(Txn.sender() == Addr("RABQ4PRRWJDCMHCCCZ24YTLTT44MI4KFZEMRWGFEYESDRBIKD6QFPNNGBQ"), Txn.note() == Bytes("OptIn")), optin()],
        # check if update txn
        [Txn.on_completion() == OnComplete().UpdateApplication, Return(Int(0))],
        # check if optin
        [Txn.on_completion() == OnComplete().OptIn, Return(Int(1))],
        # check if optout
        [Txn.on_completion() == OnComplete().CloseOut, Return(Int(1))],
        # check if delete
        [Txn.on_completion() == OnComplete().DeleteApplication, Return(Int(1))],
    )

    return conditions


# compile
print(compileTeal(teal(), mode=Mode.Application, version=5))
save_to_file_bool = True

def save_to_file():
    with open('testnet-contract.teal', 'w') as f:
        f.write(compileTeal(teal(), mode=Mode.Application, version=5))
        f.close()

if save_to_file_bool == True:
    save_to_file()
4

In

all the parts of the And are evaluated immediately, even if the first part fails.
It is like the & in C++, not like the &&.

You need to have an If…

In general, before ABI is published (which it will be published very soon), I strongly recommend having the first argument indicate the type of operation, withdraw, claim, … like in the on_call in https://developer.algorand.org/docs/get-started/dapps/pyteal/#create-auction
After the ABI is published, the ABI should be followed. Documentation is getting updated soon.

5

Thanks, I’ll try that!

6

Hello,

I fixed the errors regarding the transaction group, however, I’m now receiving errors about invalid asset reference 75313288 when deploying to the testnet.

What could cause this problem? It definitely exists: Algorand

7

You need the asset ID to be in the foreign asset array of the transaction.
See resource availability in The Algorand Virtual Machine (AVM) and TEAL. - Algorand Developer Portal

You can see its use there:

Search for foreign_assets