Expand remote keystore interface to allow for hybrid mode (#7628)

* update to latest master

* updates on docs, license, meta

* hide ssrs behind feature flag

* implement remaining functions on the server

* sign server line length fix

* fix tests

* fixup in-memory-keystore

* adding failsafe

* skipping ecdsa test for now

* remote keystore param

* remote sign urls made available

* integrating keystore remotes features

* don't forget the dependency

* remove old cruft

* reset local keystore

* applying suggestions

* Switch to single remote, minor grumbles

* minor grumbles, docs

substrate/primitives/application-crypto/test/Cargo.toml

@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 sp-core = { version = "2.0.0", default-features = false, path = "../../core" }
-sp-keystore = { version = "0.8.0", path = "../../keystore" }
+sp-keystore = { version = "0.8.0", path = "../../keystore", default-features = false }
 substrate-test-runtime-client = { version = "2.0.0", path = "../../../test-utils/runtime/client" }
 sp-runtime = { version = "2.0.0", path = "../../runtime" }
 sp-api = { version = "2.0.0", path = "../../api" }

substrate/primitives/core/Cargo.toml

@@ -96,11 +96,11 @@ std = [
 	"base58",
 	"substrate-bip39",
 	"tiny-bip39",
-	"serde",
 	"byteorder/std",
 	"rand",
 	"sha2/std",
 	"schnorrkel/std",
+	"schnorrkel/serde",
 	"regex",
 	"num-traits/std",
 	"tiny-keccak",

substrate/primitives/core/src/crypto.rs

@@ -1029,6 +1029,7 @@ pub trait CryptoType {
 	Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Encode, Decode, PassByInner,
 	crate::RuntimeDebug
 )]
+#[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
 pub struct KeyTypeId(pub [u8; 4]);
 
 impl From<u32> for KeyTypeId {
@@ -1058,10 +1059,12 @@ impl<'a> TryFrom<&'a str> for KeyTypeId {
 
 /// An identifier for a specific cryptographic algorithm used by a key pair
 #[derive(Debug, Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Encode, Decode)]
+#[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
 pub struct CryptoTypeId(pub [u8; 4]);
 
 /// A type alias of CryptoTypeId & a public key
 #[derive(Debug, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Encode, Decode)]
+#[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
 pub struct CryptoTypePublicPair(pub CryptoTypeId, pub Vec<u8>);
 
 #[cfg(feature = "std")]

substrate/primitives/keystore/Cargo.toml

@@ -20,10 +20,19 @@ futures = { version = "0.3.1" }
 schnorrkel = { version = "0.9.1", features = ["preaudit_deprecated", "u64_backend"], default-features = false }
 merlin = { version = "2.0", default-features = false }
 parking_lot = { version = "0.10.0", default-features = false }
-
+serde = { version = "1.0", optional = true}
 sp-core = { version = "2.0.0", path = "../core" }
 sp-externalities = { version = "0.8.0", path = "../externalities", default-features = false }
 
 [dev-dependencies]
 rand = "0.7.2"
 rand_chacha = "0.2.2"
+
+
+[features]
+default = ["std"]
+std = [
+	"serde",
+	"schnorrkel/std",
+	"schnorrkel/serde",
+]

substrate/primitives/keystore/src/vrf.rs

@@ -20,9 +20,11 @@
 use codec::Encode;
 use merlin::Transcript;
 use schnorrkel::vrf::{VRFOutput, VRFProof};
+
 /// An enum whose variants represent possible
 /// accepted values to construct the VRF transcript
 #[derive(Clone, Encode)]
+#[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
 pub enum VRFTranscriptValue {
 	/// Value is an array of bytes
 	Bytes(Vec<u8>),
@@ -38,6 +40,7 @@ pub struct VRFTranscriptData {
 	pub items: Vec<(&'static str, VRFTranscriptValue)>,
 }
 /// VRF signature data
+#[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
 pub struct VRFSignature {
 	/// The VRFOutput serialized
 	pub output: VRFOutput,