chore: update readme (#13)

README.md

@@ -1,27 +1,72 @@
-# jetton
-TON jetton standard implementation on tact
+# TON Jetton contract on Tact
 
-## Project structure
+ℹ️ Jetton implementation for The Open Network written in Tact language. Metadata is fully decentralized, it means that full token metadata is stored on-chain.
+
+⚠️ <b>Warning!</b> This contract is not 100% tested and I would not recommend using it in production yet.
 
--   `contracts` - source code of all the smart contracts of the project and their dependencies.
--   `wrappers` - wrapper classes (implementing `Contract` from ton-core) for the contracts, including any [de]serialization primitives and compilation functions.
--   `tests` - tests for the contracts.
--   `scripts` - scripts used by the project, mainly the deployment scripts.
+❤️ I'll be very grateful for any kind of contribution: code, docs, issues, bug reports, github stars or whatever
 
-## How to use
+<!-- # Deploy TODO -->
 
-### Build
+# Development
 
-`npx blueprint build` or `yarn blueprint build`
+This is default Tact blueprint project with default commands:
 
-### Test
+- `npm run build` - build project and compile contracts
+- `npm test` - run contracts tests
+- `npx blueprint run` - execute script from `/scripts` directory
 
-`npx blueprint test` or `yarn blueprint test`
+# Docs
+
+## Project structure
 
-### Deploy or run another script
+- `contracts` - source code of all the smart contracts
+- - `jetton` - entrypoints of jetton contracts with dependencies (traits) specified
+- - - `master.tact` - jetton master contract entrypoint
+- - - `wallet.tact` - jetton wallet contract entrypoint
+- - `teps` - traits with [TEPs](https://github.com/ton-blockchain/TEPs/) realization
+- - - `tep64.tact` - trait implementation of [TEP 64](https://github.com/ton-blockchain/TEPs/blob/master/text/0064-token-data-standard.md)
+- - - `tep74.tact` - trait implementation of [TEP 74](https://github.com/ton-blockchain/TEPs/blob/master/text/0074-jettons-standard.md)
+- - - `tep89.tact` - trait implementation of [TEP 89](https://github.com/ton-blockchain/TEPs/blob/master/text/0089-jetton-wallet-discovery.md)
+- - `consts.tact` - project constants
+- - `errors.tact` - custom project error codes (exit codes)
+- - `messages.tact` - contracts API messages
 
-`npx blueprint run` or `yarn blueprint run`
+## Exit codes
 
-### Add a new contract
+[Standard Tact exit codes](https://docs.tact-lang.org/book/exit-codes)
 
-`npx blueprint create ContractName` or `yarn blueprint create ContractName`
+<table>
+    <tr>
+        <th>Code</th>
+        <th>Description</th>
+    </tr>
+    <tr><td colspan=2>Tact lang exit codes</td></tr>
+    <tr>
+        <td>132</td>
+        <td>
+            Invalid owner of contract.</br><i>Occurs when sender wallet is not owner of receiver contract when it is required.</i>
+        </td>
+    </tr>
+    <tr><td colspan=2>Custom exit codes</td></tr>
+    <tr>
+        <td>6901</td>
+        <td>No enough TON on contract balance.</td>
+    </tr>
+    <tr>
+        <td>6902</td>
+        <td>No enoght TON in message</td>
+    </tr>
+    <tr>
+        <td>6903</td>
+        <td>
+            Jetton already initialized.<br/><i>Occurs when you send <code>0x133701</code> message to jetton that has been already initialized.</i>
+        </td>
+    </tr>
+    <tr>
+        <td>6904</td>
+        <td>
+            Max supply exceeded.</br><i>Occurs when you try mint more tokens than max_supply parameter allow.</i>
+        </td>
+    </tr>
+</table>