goer | goer - Simple golanghr event registration app | Microservice library

I'm trying to create a mint function on my dapp where a user can connect their metamask wallet, connect to the proper network (in this case I'm just testing it so it is Goerli, chainID: 5) and then click a mint button and be asked to accept the transaction, at the moment I'm struggling getting the correct syntax and setting the correct values for the transaction object, I get the error:

TypeError: DenOfDragonsSigned.mint(...) is not a function even though it is because I believe I have set the ABI correctly and: MetaMask - RPC Error: execution reverted: Insufficient funds! even though I have set the "value:" correctly and have enough test eth for the transaction

Here is my ABI:

This is the problem I am working through:

The program asks the user for the number of pieces of cake and the number of party-goers, in that order. Print the number of pieces of cake each party-goer receives and the number of pieces of cake left over

My code:

I'm having issues with Web3j with the Polygon Mumbai network, I've tried several ways to communicate with a smart contract but it sends the request to the network but the transaction will stay in a pending state for a few mins and then disappear. It states

"This txn hash was found in our secondary node and should be picked up by our indexer in a short while."

at first and then no transaction was found in a few mins. Below are a few things that I've tried

• Tried with Simple Contract and a ERC-721 same behavior

• Tried with Crating WrapperClasses via Web3j and also tried without
  the WrapperClass both the cases same behavior.

• Tried Several RPC Public Urls and also created an Infura Project with Polygon Still no luck.

• Tried to Deploy the Contact via Web3j Same result , Even tried to connect to a contract deployed via Remix to Polygon Mumbai Network

• Tried with a Local Ganache Instance and verified that Blocks are written and Works fine

• Tried with Several Gas Prices and Limits too, assuming I must've set a smaller amount I even matched the Gas Prive and limit based on a
  successful call I made via polygonscan still no luck. Tried with
  Default Gas Provider and Gas Station Still the same

Finally, Tried connecting to Goerli Testnet Network with just an URL Change, and Both Contract deploy and Transaction got success within Seconds.

Any Idea why I'm getting this behavior? Any pointers

ERC - 721 Contract in Mumbai - https://mumbai.polygonscan.com/address/0x13fb4790d16f59f5ce98e10b61c3210a41c60261

Test Simple Contract in Mumbai - https://mumbai.polygonscan.com/address/0x1adc1ee6ab16571368a71db7841274bcaaadaf62

ERC-721 Web3j Deployed Contract in Goerli - https://goerli.etherscan.io/address/0xb5342a93b37e4685a529f68110bc51afa0465a81 ** Please note that code has some errors so Contract got deployed with some errors but was able to call methods tho it never minted the token due to the error

Goerli Transaction via Web3j - https://goerli.etherscan.io/tx/0xf9c29957824049baa0c7b1d44f0e347840986baf2b6018fda0a03dec627596de

Thanks, Mihindu Karunarathne

I was given the task to create an NYC Guide project out of Python and Django. I am iterating through a nested dictionary to render boroughs, activities, and venues. The home page lists a handful of boroughs. The boroughs page lists a handful of activities in each borough. The activities page lists a handful of venues to select. My issue is when I click on one of the activities I receive a TracebackError. I am trying to at least render the venues page that has a simple 'VENUES PAGE' on it. I'd love any advice or feedback. This is my first Django project so forgive me if I didn't explain this thoroughly enough. Feel free to ask for further explanation! What I am ultimately trying to do is render an unordered list of venues for each activity in the activities page. I would like each li to be a url that takes me to the venue.html page. It doesn't have to render a specific venue. I can take it from there. I am stuck on this one step. I have already successfully rendered the borough and activities pages, and I have been able to loop through the activities, but when I click on a specific activity I get this error:

"TypeError at /brooklyn/beaches activity() missing 1 required positional argument: 'venues'"

I am very new to Flutter and have been trying for a few days now to get this right. Either I get stuck with the set state that does not reload(With a spinner) or the JSON cant is decoded as my example.

I want to get the JSON into a listview and then when the floatingActionButton button is pushed refresh the widget with the CircularProgressIndicator. This is what I have so far. All examples that I find seem not to be Null safe and again I am lost.

My example says "List' is not a subtype of type 'Map" and I can see this is because my JSON is a list List ??.

A few pointers would be greatly appreciated.

This is the JSON its pulling:

I'm working on sending transactions from one address to another on the goerli testnet and all transactions so far are not confirming. They have been staying in a pending state: https://goerli.etherscan.io/tx/0x056187763bac9adc8696fa0554c26b2f0e8ac48601dd4e5f03a30536d6597bf0

Did I do something wrong? I see the transaction in the etherscan.io/tx, but do I need some sort of callback handler?

Is this because there are not enough miners on the goerli testnet? Is Kovan the best testnet for ethereum dapp/smart contract development where transactions are being confirmed more often? Any help is appreciated.

I'm unable to figure out why 'quit' doesn't change my variable flag to False; stopping the while loop. Error below.

I am working with web3-react and I cannot figure out how to keep the connection to the MetaMask wallet persistent upon browser refreshes.

This is the code:

The following code is a popular Solidity Ethereum function