feature(lib/runtime): implement ext_offchain_timestamp and `ext_off…

…chain_sleep_until` (#1806)

* Issue#1508 First commit

* Changed interface name + Added testcase

* Removed leftover comments

* Updated host api runtime + Added testcase

* add support for polkadot runtime v0.9.10

* cleanup

* Removed testcases temporarily

* Updated base Go version to 1.17 to resolve time.UnixMilli issues

* Updated go.mod

* Removed unused context

* Updated go-version to 1.17.x in github workflows

* Updated go version in the Dockerfile

* added .devcontainer in the gitignore

* Linked related issue for the unimplemented unit test

* Fixed CGO issues

* Fixed lint issues

* Fixed unit tests

Co-authored-by: noot <elizabethjbinks@gmail.com>
Co-authored-by: noot <36753753+noot@users.noreply.github.com>

lib/runtime/constants.go

@@ -32,9 +32,10 @@ const (
 	POLKADOT_RUNTIME_URL = "https://github.com/noot/polkadot/blob/noot/v0.8.25/polkadot_runtime.wasm?raw=true"
 
 	// v0.9 test API wasm
-	HOST_API_TEST_RUNTIME     = "hostapi_runtime"
-	HOST_API_TEST_RUNTIME_FP  = "hostapi_runtime.compact.wasm"
-	HOST_API_TEST_RUNTIME_URL = "https://github.com/ChainSafe/polkadot-spec/blob/b94d8c58ad6ea8bf827b0cae1645a999719c2bc7/test/runtimes/hostapi/hostapi_runtime.compact.wasm?raw=true"
+	HOST_API_TEST_RUNTIME    = "hostapi_runtime"
+	HOST_API_TEST_RUNTIME_FP = "hostapi_runtime.compact.wasm"
+	// HOST_API_TEST_RUNTIME_URL = "https://github.com/ChainSafe/polkadot-spec/blob/b94d8c58ad6ea8bf827b0cae1645a999719c2bc7/test/runtimes/hostapi/hostapi_runtime.compact.wasm?raw=true"
+	HOST_API_TEST_RUNTIME_URL = "https://github.com/ChainSafe/polkadot-spec/blob/omar/offchain/test/runtimes/hostapi/hostapi_runtime.compact.wasm?raw=true"
 
 	// v0.8 substrate runtime with modified name and babe C=(1, 1)
 	DEV_RUNTIME     = "dev_runtime"

lib/runtime/wasmer/imports.go

@@ -104,6 +104,7 @@ import (
 	"math/big"
 	"math/rand"
 	"reflect"
+	"time"
 	"unsafe"
 
 	"github.com/ChainSafe/gossamer/internal/log"
@@ -1699,16 +1700,21 @@ func ext_offchain_submit_transaction_version_1(context unsafe.Pointer, data C.in
 }
 
 //export ext_offchain_timestamp_version_1
-func ext_offchain_timestamp_version_1(context unsafe.Pointer) C.int64_t {
+func ext_offchain_timestamp_version_1(_ unsafe.Pointer) C.int64_t {
 	logger.Trace("[ext_offchain_timestamp_version_1] executing...")
-	logger.Warn("[ext_offchain_timestamp_version_1] unimplemented")
-	return 0
+
+	now := time.Now().Unix()
+	return C.int64_t(now)
 }
 
 //export ext_offchain_sleep_until_version_1
 func ext_offchain_sleep_until_version_1(_ unsafe.Pointer, deadline C.int64_t) {
-	logger.Trace("executing...")
-	logger.Warn("unimplemented")
+	logger.Trace("[ext_offchain_sleep_until_version_1] executing...")
+
+	dur := time.Until(time.UnixMilli(int64(deadline)))
+	if dur > 0 {
+		time.Sleep(dur)
+	}
 }
 
 //export ext_offchain_http_request_start_version_1

lib/runtime/wasmer/imports_test.go

@@ -10,6 +10,7 @@ import (
 	"os"
 	"sort"
 	"testing"
+	"time"
 
 	"github.com/ChainSafe/chaindb"
 	"github.com/ChainSafe/gossamer/internal/log"
@@ -47,6 +48,35 @@ func TestMain(m *testing.M) {
 	os.Exit(code)
 }
 
+func Test_ext_offchain_timestamp_version_1(t *testing.T) {
+	inst := NewTestInstance(t, runtime.HOST_API_TEST_RUNTIME)
+	runtimeFunc, ok := inst.vm.Exports["rtm_ext_offchain_timestamp_version_1"]
+	require.True(t, ok)
+
+	res, err := runtimeFunc(0, 0)
+	require.NoError(t, err)
+
+	offset, length := runtime.Int64ToPointerAndSize(res.ToI64())
+	data := inst.load(offset, length)
+	var timestamp int64
+	err = scale.Unmarshal(data, &timestamp)
+	require.NoError(t, err)
+
+	expected := time.Now().Unix()
+	require.GreaterOrEqual(t, expected, timestamp)
+}
+
+func Test_ext_offchain_sleep_until_version_1(t *testing.T) {
+	inst := NewTestInstance(t, runtime.HOST_API_TEST_RUNTIME)
+
+	input := time.Now().UnixMilli()
+	enc, err := scale.Marshal(input)
+	require.NoError(t, err)
+
+	_, err = inst.Exec("rtm_ext_offchain_sleep_until_version_1", enc) //auto conversion to i64
+	require.NoError(t, err)
+}
+
 func Test_ext_hashing_blake2_128_version_1(t *testing.T) {
 	t.Parallel()
 	inst := NewTestInstance(t, runtime.HOST_API_TEST_RUNTIME)
@@ -1454,8 +1484,7 @@ func Test_ext_default_child_storage_storage_kill_version_2_limit_none(t *testing
 	encChildKey, err := scale.Marshal(testChildKey)
 	require.NoError(t, err)
 
-	var val *[]byte // nolint
-	val = nil
+	var val *[]byte
 	optLimit, err := scale.Marshal(val)
 	require.NoError(t, err)