Add embedded elliptic curve keys to Substrate

substrate/node/Cargo.toml

@@ -27,6 +27,10 @@ log = "0.4"
 
 schnorrkel = "0.11"
 
+ciphersuite = { path = "../../crypto/ciphersuite" }
+embedwards25519 = { path = "../../crypto/evrf/embedwards25519" }
+secq256k1 = { path = "../../crypto/evrf/secq256k1" }
+
 libp2p = "0.52"
 
 sp-core = { git = "https://github.com/serai-dex/substrate" }

substrate/node/src/chain_spec.rs

@@ -1,13 +1,20 @@
 use core::marker::PhantomData;
-use std::collections::HashSet;
 
-use sp_core::{Decode, Pair as PairTrait, sr25519::Public};
+use sp_core::Pair as PairTrait;
 
 use sc_service::ChainType;
 
+use ciphersuite::{
+  group::{ff::PrimeField, GroupEncoding},
+  Ciphersuite,
+};
+use embedwards25519::Embedwards25519;
+use secq256k1::Secq256k1;
+
 use serai_runtime::{
-  primitives::*, WASM_BINARY, BABE_GENESIS_EPOCH_CONFIG, RuntimeGenesisConfig, SystemConfig,
-  CoinsConfig, DexConfig, ValidatorSetsConfig, SignalsConfig, BabeConfig, GrandpaConfig,
+  primitives::*, validator_sets::AllEmbeddedEllipticCurveKeysAtGenesis, WASM_BINARY,
+  BABE_GENESIS_EPOCH_CONFIG, RuntimeGenesisConfig, SystemConfig, CoinsConfig, DexConfig,
+  ValidatorSetsConfig, SignalsConfig, BabeConfig, GrandpaConfig,
 };
 
 pub type ChainSpec = sc_service::GenericChainSpec<RuntimeGenesisConfig>;
@@ -16,6 +23,15 @@ fn account_from_name(name: &'static str) -> PublicKey {
   insecure_pair_from_name(name).public()
 }
 
+// Panics on names which are too long, or ciphersuites with weirdly encoded scalars
+fn insecure_ciphersuite_key_from_name<C: Ciphersuite>(name: &'static str) -> Vec<u8> {
+  let mut repr = <C::F as PrimeField>::Repr::default();
+  let repr_len = repr.as_ref().len();
+  let start = (repr_len / 2) - (name.len() / 2);
+  repr.as_mut()[start .. (start + name.len())].copy_from_slice(name.as_bytes());
+  (C::generator() * C::F::from_repr(repr).unwrap()).to_bytes().as_ref().to_vec()
+}
+
 fn wasm_binary() -> Vec<u8> {
   // TODO: Accept a config of runtime path
   const WASM_PATH: &str = "/runtime/serai.wasm";
@@ -32,7 +48,21 @@ fn devnet_genesis(
   validators: &[&'static str],
   endowed_accounts: Vec<PublicKey>,
 ) -> RuntimeGenesisConfig {
-  let validators = validators.iter().map(|name| account_from_name(name)).collect::<Vec<_>>();
+  let validators = validators
+    .iter()
+    .map(|name| {
+      (
+        account_from_name(name),
+        AllEmbeddedEllipticCurveKeysAtGenesis {
+          embedwards25519: insecure_ciphersuite_key_from_name::<Embedwards25519>(name)
+            .try_into()
+            .unwrap(),
+          secq256k1: insecure_ciphersuite_key_from_name::<Secq256k1>(name).try_into().unwrap(),
+        },
+      )
+    })
+    .collect::<Vec<_>>();
+
   RuntimeGenesisConfig {
     system: SystemConfig { code: wasm_binary.to_vec(), _config: PhantomData },
 
@@ -65,17 +95,18 @@ fn devnet_genesis(
     },
     signals: SignalsConfig::default(),
     babe: BabeConfig {
-      authorities: validators.iter().map(|validator| ((*validator).into(), 1)).collect(),
+      authorities: validators.iter().map(|validator| (validator.0.into(), 1)).collect(),
       epoch_config: Some(BABE_GENESIS_EPOCH_CONFIG),
       _config: PhantomData,
     },
     grandpa: GrandpaConfig {
-      authorities: validators.into_iter().map(|validator| (validator.into(), 1)).collect(),
+      authorities: validators.into_iter().map(|validator| (validator.0.into(), 1)).collect(),
       _config: PhantomData,
     },
   }
 }
 
+/*
 fn testnet_genesis(wasm_binary: &[u8], validators: Vec<&'static str>) -> RuntimeGenesisConfig {
   let validators = validators
     .into_iter()
@@ -126,6 +157,7 @@ fn testnet_genesis(wasm_binary: &[u8], validators: Vec<&'static str>) -> Runtime
     },
   }
 }
+*/
 
 pub fn development_config() -> ChainSpec {
   let wasm_binary = wasm_binary();
@@ -204,7 +236,7 @@ pub fn local_config() -> ChainSpec {
 }
 
 pub fn testnet_config() -> ChainSpec {
-  let wasm_binary = wasm_binary();
+  // let wasm_binary = wasm_binary();
 
   ChainSpec::from_genesis(
     // Name
@@ -213,7 +245,7 @@ pub fn testnet_config() -> ChainSpec {
     "testnet-2",
     ChainType::Live,
     move || {
-      let _ = testnet_genesis(&wasm_binary, vec![]);
+      // let _ = testnet_genesis(&wasm_binary, vec![])
       todo!()
     },
     // Bootnodes