# Development guide

ℹ️ This document describes how to build application based on this jetton. If you are looking for guideline how to contribute to this project, please read [this](https://docs.supadupa.space/jetton/contributing) document

* [Definitions](#definitions)
* [Exit codes](#exit-codes)

## Definitions

According to [TON Jetton Standard](https://github.com/ton-blockchain/TEPs/blob/master/text/0074-jettons-standard.md) there are actually 2 smart contracts:

* **Jetton Master** contract that deploys in single copy for your jetton
* **Jetton Wallet** contract that deploys for each jetton owner

[Read more about jetton architecture on TON](https://docs.ton.org/develop/dapps/asset-processing/jettons#jetton-architecture)

## Exit codes

This project using custom exit codes for specific error. You can match received exit code with following list and get human-friednly error text.

[Standard Tact exit codes](https://docs.tact-lang.org/book/exit-codes)

| Code                 | Description                                                                                                                                    |
| -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| Tact lang exit codes |                                                                                                                                                |
| 132                  | <p>Invalid owner of contract.<br><em>Occurs when sender wallet is not owner of receiver contract when it is required.</em></p>                 |
| Custom exit codes    |                                                                                                                                                |
| 6901                 | No enough TON on contract balance.                                                                                                             |
| 6902                 | No enough TON in message                                                                                                                       |
| 6903                 | <p>Jetton already initialized.<br><em>Occurs when you send <code>0x133701</code> message to jetton that has been already initialized.</em></p> |
| 6904                 | <p>Max supply exceeded.<br><em>Occurs when you try mint more tokens than max\_supply parameter allow.</em></p>                                 |
| 6905                 | <p>Invalid transfer amount.<br><em>Occurs when you try to send, burn or mint 0 tokens.</em></p>                                                |
| 6906                 | <p>Minting already disabled.<br><em>Occurs when you attempt to enable minting after it has been permanently disabled.</em></p>                 |
| 6907                 | <p>Minting is disabled.<br><em>Occurs when you try to mint tokens while the minting functionality is disabled.</em></p>                        |


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