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Offchain Workers: Example Pallet (#4989)

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* Example of offchain worker pallet.

* Fix compilation issues.

* Use serde_json to parse JSON.

* Add some basic tests.

* Working on docs.

* Fix compilation

* Finish docs for signed.

* Work on unsigned send.

* Add some tests and missing docs.

* Add example of StorageValueRef

* Add weight.

* Extra \n

* Fix im-online test.

* Bump runtime.

* Fix tests.

* Apply suggestions from code review

Co-Authored-By: Joshy Orndorff <JoshOrndorff@users.noreply.github.com>
Co-Authored-By: Gavin Wood <gavin@parity.io>

* Address review comments.

Co-authored-by: Joshy Orndorff <JoshOrndorff@users.noreply.github.com>
Co-authored-by: Gavin Wood <github@gavwood.com>
This commit is contained in:
Tomasz Drwięga
2020-02-20 15:21:34 +01:00
committed by GitHub
parent 5bf644b768
commit 9a0b8b5be5
11 changed files with 832 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/frame/im-online/src/lib.rs
-2
View File
@@ -341,8 +341,6 @@ decl_module! {
// Runs after every block.
fn offchain_worker(now: T::BlockNumber) {
debug::RuntimeLogger::init();
// Only send messages if we are a potential validator.
if sp_io::offchain::is_validator() {
for res in Self::send_heartbeats(now).into_iter().flatten() {
substrate/frame/im-online/src/tests.rs
+7 -8
View File
@@ -192,6 +192,8 @@ fn late_heartbeat_should_fail() {
#[test]
fn should_generate_heartbeats() {
use sp_runtime::traits::OffchainWorker;
let mut ext = new_test_ext();
let (offchain, _state) = TestOffchainExt::new();
let (pool, state) = TestTransactionPoolExt::new();
@@ -202,6 +204,7 @@ fn should_generate_heartbeats() {
// given
let block = 1;
System::set_block_number(block);
UintAuthorityId::set_all_keys(vec![0, 1, 2]);
// buffer new validators
Session::rotate_session();
// enact the change and buffer another one
@@ -209,17 +212,13 @@ fn should_generate_heartbeats() {
Session::rotate_session();
// when
UintAuthorityId::set_all_keys(vec![0, 1, 2]);
ImOnline::send_heartbeats(2)
.unwrap()
// make sure to consume the iterator and check there are no errors.
.collect::<Result<Vec<_>, _>>().unwrap();
ImOnline::offchain_worker(block);
// then
let transaction = state.write().transactions.pop().unwrap();
// All validators have `0` as their session key, so we generate 3 transactions.
// All validators have `0` as their session key, so we generate 2 transactions.
assert_eq!(state.read().transactions.len(), 2);
// check stuff about the transaction.
let ex: Extrinsic = Decode::decode(&mut &*transaction).unwrap();
let heartbeat = match ex.call {
@@ -228,7 +227,7 @@ fn should_generate_heartbeats() {
};
assert_eq!(heartbeat, Heartbeat {
block_number: 2,
block_number: block,
network_state: sp_io::offchain::network_state().unwrap(),
session_index: 2,
authority_index: 2,