Fixes GrandpaApi implementation and usage

substrate/node/runtime/wasm/Cargo.lock

@@ -526,6 +526,7 @@ dependencies = [
  "srml-treasury 0.1.0",
  "srml-upgrade-key 0.1.0",
  "substrate-client 0.1.0",
+ "substrate-fg-primitives 0.1.0",
  "substrate-primitives 0.1.0",
 ]
 
@@ -1272,6 +1273,18 @@ dependencies = [
  "wasmi 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "substrate-fg-primitives"
+version = "0.1.0"
+dependencies = [
+ "parity-codec 2.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parity-codec-derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sr-primitives 0.1.0",
+ "sr-std 0.1.0",
+ "substrate-client 0.1.0",
+ "substrate-primitives 0.1.0",
+]
+
 [[package]]
 name = "substrate-keyring"
 version = "0.1.0"

substrate/node/runtime/wasm/Cargo.toml

@@ -12,6 +12,7 @@ safe-mix = { version = "1.0", default-features = false }
 parity-codec-derive = { version = "2.1" }
 parity-codec = { version = "2.1", default-features = false }
 substrate-primitives = { path = "../../../core/primitives", default-features = false }
+substrate-fg-primitives = { path = "../../../core/finality-grandpa/primitives", default-features = false }
 substrate-client = { path = "../../../core/client", default-features = false }
 sr-std = { path = "../../../core/sr-std", default-features = false }
 srml-support = { path = "../../../srml/support", default-features = false }
@@ -38,6 +39,7 @@ std = [
 	"parity-codec/std",
 	"substrate-primitives/std",
 	"substrate-client/std",
+	"substrate-fg-primitives/std",
 	"sr-std/std",
 	"srml-support/std",
 	"srml-balances/std",