added discussions accounts factory to community contract (#88)

This issue is supporting PR
[#645](NEAR-DevHub/neardevhub-bos#645)

@frolvlad @ailisp  I would like to get some feedback on my approach.

I assumed that in order to create
`discussions.${handle}.community.devhub.near` the
`${handle}.community.devhub.near` account needs to be an factory in
itself.


I added this image help describe what I did with some common
terminology.
<img width="1072" alt="Screenshot 2024-01-23 at 17 31 22"
src="https://github.com/NEAR-DevHub/neardevhub-contract/assets/28901891/7b0b1145-0828-4e32-9a1d-cb0ba32354f9">

I added a `set_discussions_community_socialdb` function so the user can
post on socialdb from the devhub.near contract. This uses
`get_devhub_discussions_account` which retrieves
`discussions.<handle>.community.devhub.near`.

To support that I added a `create_discussions_account` function to the
community contract. So the community contract is in essence a
discussions factory. I copied most of what was the community contract to
the discussions contract with some minor tweaks since it is a level down
in subaccounts.

In file `community/src/lib.rs` line 9 and 70 a PUBkey from devhub.near
is used to give control to make posts on socialDB.
Should this be devhub.near?

.github/workflows/main.yml

@@ -13,6 +13,8 @@ jobs:
         uses: actions/checkout@v2
       - uses: Swatinem/rust-cache@v1
       - run: rustup target add wasm32-unknown-unknown
+      - name: Build discussions contract
+        run: cd discussions && ./build.sh
       - name: Build community contract
         run: cd community && ./build.sh
       - name: Build community factory contract

.github/workflows/release.yml

@@ -18,6 +18,8 @@ jobs:
       uses: actions/checkout@v2
     - uses: Swatinem/rust-cache@v1
     - run: rustup target add wasm32-unknown-unknown
+    - name: Build discussions contract
+      run: cd discussions && ./build.sh
     - name: Build community contract
       run: cd community && ./build.sh
     - name: Build community factory contract

community-factory/src/lib.rs

@@ -2,7 +2,7 @@ use near_sdk::borsh::{BorshDeserialize, BorshSerialize};
 use near_sdk::{env, near_bindgen, require, AccountId, Gas, NearToken, Promise};
 
 const CODE: &[u8] = include_bytes!("../../res/devhub_community.wasm");
-const INITIAL_BALANCE: NearToken = NearToken::from_near(2);
+const INITIAL_BALANCE: NearToken = NearToken::from_near(4);
 const PUBKEY_STR: &str = "ed25519:4deBAvg1S4MF7qe9GBDJwDCGLyyXtJa73JnMXwyG9vsB";
 
 #[near_bindgen]
@@ -23,8 +23,8 @@ impl Contract {
             "Can only be called from parent contract"
         );
         require!(
-            env::attached_deposit() == INITIAL_BALANCE,
-            "Require 2 NEAR to create community account"
+            env::attached_deposit() >= INITIAL_BALANCE,
+            "Require 4 NEAR to create community account"
         );
 
         let community_account_id: AccountId =
@@ -40,7 +40,7 @@ impl Contract {
                 "new".to_string(),
                 b"{}".to_vec(),
                 NearToken::from_near(0),
-                Gas::from_tgas(20),
+                Gas::from_tgas(50),
             )
     }
 }

community/src/lib.rs

@@ -1,18 +1,23 @@
 mod social_db;
-
 use crate::social_db::social_db_contract;
+use near_sdk;
 use near_sdk::borsh::{BorshDeserialize, BorshSerialize};
+use near_sdk::Gas;
 use near_sdk::{env, near_bindgen, require, AccountId, NearToken, Promise};
 
+const CODE: &[u8] = include_bytes!("../../res/devhub_discussions.wasm");
+const INITIAL_BALANCE: NearToken = NearToken::from_near(4);
+const PUBKEY_STR: &str = "ed25519:4deBAvg1S4MF7qe9GBDJwDCGLyyXtJa73JnMXwyG9vsB";
+
 #[near_bindgen]
 #[derive(BorshDeserialize, BorshSerialize, Default)]
 #[borsh(crate = "near_sdk::borsh")]
 pub struct Contract {}
 
 #[near_bindgen]
 impl Contract {
-    #[init]
-    pub fn new() -> Self {
+    #[payable]
+    pub fn new(&mut self) -> Promise {
         social_db_contract()
             .with_unused_gas_weight(1)
             .with_attached_deposit(NearToken::from_near(1))
@@ -21,7 +26,8 @@ impl Contract {
                 None,
                 vec![env::current_account_id().to_string()],
             );
-        Contract {}
+
+        self.create_discussions_account()
     }
 
     pub fn destroy(&mut self) {
@@ -41,4 +47,22 @@ impl Contract {
             .expect("Community factory should be deployed on a child account")
             .into()
     }
+
+    pub fn create_discussions_account(&mut self) -> Promise {
+        let account_id: AccountId =
+            format!("discussions.{}", env::current_account_id()).parse().unwrap();
+
+        let pubkey = PUBKEY_STR.parse().unwrap();
+        Promise::new(account_id)
+            .create_account()
+            .add_full_access_key(pubkey)
+            .transfer(NearToken::from_near(2))
+            .deploy_contract(CODE.to_vec())
+            .function_call(
+                "new".to_string(),
+                b"{}".to_vec(),
+                NearToken::from_near(0),
+                Gas::from_tgas(20),
+            )
+    }
 }