review structure

exercises/ex05-offchain-workers/http-call/Cargo.toml

@@ -0,0 +1,40 @@
+[package]
+name = "pallet-http-call"
+version = "2.5.0"
+edition = "2021"
+authors = ["Mrisho Lukamba"]
+description = "https://github.com/MrishoLukamba/MrishoLukamba"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = [
+	"derive",
+] }
+scale-info = { version = "2.1.1", default-features = false, features = ["derive"] }
+frame-benchmarking = { version = "4.0.0-dev", default-features = false, optional = true, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+frame-support = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+frame-system = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-runtime = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-std = { default-features = false, version = "4.0.0-dev", git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.27"}
+
+log = "0.4.17"
+lite-json = "0.2.0"
+
+[dev-dependencies]
+sp-core = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-io = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-runtime = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"frame-benchmarking/std",
+	"frame-support/std",
+	"frame-system/std",
+	"scale-info/std",
+]

exercises/ex05-offchain-workers/http-call/src/lib.rs

@@ -0,0 +1,74 @@
+#![cfg_attr(not(feature = "std"),no_std)]
+#[cfg(test)]
+mod tests;
+
+pub use pallet::*;
+#[frame_support::pallet]
+pub mod pallet{
+	use frame_system::pallet_prelude::*;
+	use frame_support::pallet_prelude::*;
+	use sp_runtime::offchain::{http};
+	use log;
+	use lite_json;
+	use lite_json::JsonValue;
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {}
+
+	#[pallet::pallet]
+	pub struct Pallet<T>(_);
+
+
+	impl<T: Config> Pallet<T> {
+		pub fn get_external_data() -> Result<u32, http::Error> {
+
+			let request = http::Request::get("https://api.fda.gov/food/enforcement.json?limit=0");
+			let pending = request.send().map_err(|_|http::Error::Unknown)?;
+			let result = pending.wait();
+
+			let response = result.map_err(|_| http::Error::IoError)?;
+
+			if response.code != 200 {
+				log::info!("Failed Response Code {}",response.code);
+				return Err(http::Error::IoError)
+			}
+			log::info!("fetched success");
+
+			let body = response.body().collect::<Vec<u8>>();
+			let body_str = sp_std::str::from_utf8(&body[..])
+				.map_err(|_| http::Error::Unknown)?;
+			let body_json = lite_json::json_parser::parse_json(body_str)
+				.map_err(|_|http::Error::Unknown)?;
+			let result_total = Self::parse_to_int(body_json).unwrap();
+			Ok(result_total)
+
+		}
+
+		pub fn parse_to_int(body: JsonValue) -> Option<u32>{
+			let result = match body {
+				JsonValue::Object(obj) => {
+					let (_,val) = obj.into_iter().find(|(k,_)| k.iter().copied().eq("meta".chars()))?;
+					match val {
+						JsonValue::Object(obj) => {
+							let (_,val) = obj.into_iter().find(|(k,_)|k.iter().copied().eq("results".chars()))?;
+							match val {
+								JsonValue::Object(obj) => {
+									let (_,val) = obj.into_iter().find(|(k,_)|k.iter().copied().eq("total".chars()))?;
+									match val  {
+										JsonValue::Number(num) => Some(num),
+										_=> None
+									}
+								},
+								_=> None
+							}
+						},
+						_=> None
+					}
+				},
+				_=> None
+			};
+			Some(result.unwrap().integer as u32)
+		}
+	}
+
+}

exercises/ex05-offchain-workers/http-call/src/tests.rs

@@ -0,0 +1,95 @@
+use crate as pallet_http_call;
+use frame_support::traits::{ConstU16, ConstU32, ConstU64};
+use sp_runtime::{
+	testing::{Header},
+	traits::{Extrinsic, IdentifyAccount, Verify}
+};
+use sp_core::H256;
+use sp_runtime::{
+	traits::{BlakeTwo256, IdentityLookup},
+};
+use sp_core::{
+	offchain::{testing, OffchainWorkerExt, TransactionPoolExt},
+	sr25519::Signature,
+};
+type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<TestRuntime>;
+type Block = frame_system::mocking::MockBlock<TestRuntime>;
+
+// Configure a mock runtime to test the pallet.
+frame_support::construct_runtime!(
+	pub enum TestRuntime where
+		Block = Block,
+		NodeBlock = Block,
+		UncheckedExtrinsic = UncheckedExtrinsic,
+	{
+		System: frame_system::{Pallet, Call, Config, Storage, Event<T>},
+		HttpCall: pallet_http_call,
+	}
+);
+
+
+impl frame_system::Config for TestRuntime {
+	type BaseCallFilter = frame_support::traits::Everything;
+	type BlockWeights = ();
+	type BlockLength = ();
+	type DbWeight = ();
+	type Origin = Origin;
+	type Call = Call;
+	type Index = u64;
+	type BlockNumber = u64;
+	type Hash = H256;
+	type Hashing = BlakeTwo256;
+	type AccountId = u64;
+	type Lookup = IdentityLookup<Self::AccountId>;
+	type Header = Header;
+	type Event = Event;
+	type BlockHashCount = ConstU64<250>;
+	type Version = ();
+	type PalletInfo = PalletInfo;
+	type AccountData = ();
+	type OnNewAccount = ();
+	type OnKilledAccount = ();
+	type SystemWeightInfo = ();
+	type SS58Prefix = ConstU16<42>;
+	type OnSetCode = ();
+	type MaxConsumers = ConstU32<16>;
+}
+
+impl pallet_http_call::Config for TestRuntime {}
+
+#[test]
+fn test_htt_call(){
+	let mut test_ext = sp_io::TestExternalities::default();
+	let (ocw, ocw_state) = testing::TestOffchainExt::new();
+	let ocw_ext = OffchainWorkerExt::new(ocw);
+	test_ext.register_extension(ocw_ext);
+
+	ocw_state.write().expect_request(testing::PendingRequest {
+		method: "GET".into(),
+		uri: "https://api.fda.gov/food/enforcement.json?limit=0".into(),
+		response: Some(br#"
+		    {
+			  "meta": {
+				"disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
+				"terms": "https://open.fda.gov/terms/",
+				"license": "https://open.fda.gov/license/",
+				"last_updated": "2022-08-31",
+				"results": {
+				  "skip": 0,
+				  "limit": 0,
+				  "total": 22840
+				}
+			  },
+              "results": []
+            }
+		"#.to_vec()),
+		sent: true,
+		..Default::default()
+	});
+
+
+	test_ext.execute_with(||{
+		let total_result = HttpCall::get_external_data().unwrap();
+		assert_eq!(total_result,22840);
+	})
+}

exercises/ex05-offchain-workers/offchain-call/Cargo.toml

@@ -0,0 +1,43 @@
+[package]
+name = "pallet-offchain-call"
+version = "2.5.0"
+edition = "2021"
+authors = ["Mrisho Lukamba"]
+description = "https://github.com/MrishoLukamba/MrishoLukamba"
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = [
+	"derive",
+] }
+scale-info = { version = "2.1.1", default-features = false, features = ["derive"] }
+frame-benchmarking = { version = "4.0.0-dev", default-features = false, optional = true, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+frame-support = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+frame-system = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-runtime = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-core = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+log = "0.4.17"
+sp-std = { default-features = false, version = "4.0.0-dev", git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.27"}
+lite-json = "0.2.0"
+
+[dev-dependencies]
+sp-core = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-io = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-runtime = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+sp-keystore = { version="0.12.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28"}
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"frame-benchmarking/std",
+	"frame-support/std",
+	"frame-system/std",
+	"scale-info/std",
+	"sp-runtime/std",
+	"sp-core/std",
+	"sp-std/std"
+]