.gitignore

@@ -1,5 +1 @@
-openethereum/.env
+data
-openethereum/key
-openethereum/data
-openethereum/password
-devops/caddy

README.md

@@ -1,61 +1,2 @@
-## Kitabu Chain
+# kitabu-chain
 
-### Prerequisites
-
-_This step assumes you have root access on a Debian or Ubuntu based host OS_
-
-```bash
-$ apt get update
-$ apt install chrony curl git
-$ curl -fsSL https://get.docker.com | bash
-$ curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
-$ chmod +x /usr/local/bin/docker-compose
-```
-
-### Validator node setup
-
-#### 1. Clone this repo
-
-```bash
-$ git clone https://git.grassecon.net/grassrootseconomics/kitabu-chain
-$ cd kitabu chain
-```
-
-#### 2. Obtain your private key
-
-If you have an existing keystore file, rename it to `key` else create a new one:
-
-```bash
-$ openethereum account new --base-path=$(pwd)
-$ mv keys/ethereum/UTC* ./key
-$ rm -rf keys
-```
-
-Save the password of the key created above in a `password` file. Save the key's public address for the next step.
-
-#### 3. Setup environmental variables and other configs
-
-```bash
-cp .env.example .env
-```
-
-Edit the `.env` file:
-
-- `EXT_IP`: Your server's external IP (`curl ifconfig.me`)
-- `ACCOUNT`: Your private key's public address
-
-Edit `docker-compose.yml` or `kitabu.toml` to tweak the Openethereum config as per your own preferences.
-
-#### 4. Start the validator node
-
-```bash
-$ docker-compose up
-#  or...
-$ docker-compose up -d
-```
-
-#### 5. Reverse proxy setup
-
-The `devops` folder contains a Caddy config to use as a reverse proxy to further control access to your validator node's API.
-
-Replace `.yourdomain` in the `Caddyfile` and point it to your server IP.

contracts/validators/KitabuValidators.sol

@@ -0,0 +1,94 @@
+// Author: Mohamed Sohail <mohamedsohailazim@gmail.com>
+// SPDX-License-Identifier:	GPL-3.0-or-later
+
+pragma solidity >=0.6.12;
+
+contract KitabuValidators {
+    address constant SYSTEM_ADDRESS =
+        0xffffFFFfFFffffffffffffffFfFFFfffFFFfFFfE;
+    address public admissionController =
+        0x9F57B4A25638F3bdfFcB1F3d2902860601a1Aa65;
+
+    address[] validators;
+
+    bool public finalized;
+
+    mapping(address => uint256) validatorSetIndex;
+
+    event NewAdmissionController(
+        address indexed old,
+        address indexed newController
+    );
+    event InitiateChange(bytes32 indexed parentHash, address[] newSet);
+    event ChangeFinalized(address[] currentSet);
+
+    modifier onlySystemChange() {
+        require(msg.sender == SYSTEM_ADDRESS);
+        _;
+    }
+
+    modifier alreadyFinalized() {
+        require(finalized);
+        _;
+    }
+
+    modifier onlyAdmissionController() {
+        require(msg.sender == admissionController);
+        _;
+    }
+
+    constructor() public {
+        validators.push(admissionController);
+        validatorSetIndex[admissionController] = 0;
+        finalized = true;
+    }
+
+    function setNewAdmissionController(address newController)
+        public
+        onlyAdmissionController
+    {
+        emit NewAdmissionController(admissionController, newController);
+        admissionController = newController;
+    }
+
+    function getValidators() public view returns (address[] memory) {
+        return validators;
+    }
+
+    function initiateChange() private {
+        finalized = false;
+        emit InitiateChange(blockhash(block.number - 1), getValidators());
+    }
+
+    function finalizeChange() public onlySystemChange {
+        finalized = true;
+        emit ChangeFinalized(validators);
+    }
+
+    function addValidator(address newValidator)
+        public
+        onlyAdmissionController
+        alreadyFinalized
+    {
+        validators.push(newValidator);
+        validatorSetIndex[newValidator] = validators.length - 1;
+        initiateChange();
+    }
+
+    function removeValidator(address exValidator)
+        public
+        onlyAdmissionController
+        alreadyFinalized
+    {
+        orderedRemoval(validatorSetIndex[exValidator]);
+        delete validatorSetIndex[exValidator];
+        initiateChange();
+    }
+
+    function orderedRemoval(uint256 index) private {
+        for (uint256 i = index; i < validators.length - 1; i++) {
+            validators[i] = validators[i + 1];
+        }
+        validators.pop();
+    }
+}

devops/Caddyfile

@@ -1,12 +0,0 @@
-rpc.yourdomain {
-    reverse_proxy openethereum:8545
-}
-
-ws.yourdomain {
-    @websockets {
-        header Connection *Upgrade*
-        header Upgrade    websocket
-    }
-
-    reverse_proxy @websockets openethereum:8546
-}

devops/docker-compose.yml

@@ -1,17 +0,0 @@
-version: '3.9'
-services:
-  caddy:
-    restart: unless-stopped
-    container_name: caddy
-    image: caddy:2-alpine
-    volumes:
-      - ./Caddyfile:/etc/caddy/Caddyfile
-      - ./caddy/data:/data
-    ports:
-      - '80:80'
-      - '443:443'
-    networks:
-      - openethereum_kitabu
-networks:
-  openethereum_kitabu:
-    external: true

openethereum/.env.example

@@ -1,2 +0,0 @@
-EXT_IP=
-ACCOUNT=

openethereum/docker-compose.yml

@@ -1,37 +0,0 @@
-version: '3.9'
-services:
-  openethereum:
-    init: true
-    user: root
-    restart: unless-stopped
-    container_name: kitabu-openethereum
-    image: openethereum/openethereum:v3.3.3
-    command:
-      --config=/root/kitabu.toml
-      --nat='extip:$EXT_IP'
-      --engine-signer='$ACCOUNT'
-      --jsonrpc-port=8545
-      --jsonrpc-cors=all
-      --jsonrpc-interface=all
-      --jsonrpc-hosts=all
-      --jsonrpc-apis=web3,eth,net,parity
-      --ws-port=8546
-      --ws-interface=all
-      --ws-hosts=all      
-    volumes:
-      - ./key:/root/data/keys/kitabu_sarafu/key
-      - ./kitabu.json:/root/kitabu.json
-      - ./kitabu.toml:/root/kitabu.toml
-      - ./password:/root/password
-      - ./data:/root/data
-    expose:
-      - '8545'
-      - '8546'
-    ports:
-      - '30303:30303'
-      - '30303:30303/udp'
-    networks:
-      - kitabu
-networks:
-  kitabu:
-    driver: bridge

openethereum/kitabu.toml

@@ -1,22 +0,0 @@
-[parity]
-chain = "/root/kitabu.json"
-base_path = "/root/data"
-
-[network]
-max_peers = 25
-snapshot_peers = 10
-
-[account]
-password = ["/root/password"]
-
-[mining]
-reseal_on_txs = "none"
-force_sealing = true
-min_gas_price = 1
-gas_floor_target = "1"
-
-[footprint]
-tracing = "on"
-pruning = "archive"
-pruning_history = 256
-cache_size_db = 2000