swap deprecated sp-ark-bls12-381 crate with sp-crypto-ec-utils::bls12-381

Author: l0r1s

Cargo.lock

@@ -274,7 +274,6 @@ sp-keystore = { git = "https://github.com/paritytech/polkadot-sdk.git", tag = "p
 w3f-bls = { git = "https://github.com/opentensor/bls", branch = "fix-no-std", default-features = false }
 ark-crypto-primitives = { version = "0.4.0", default-features = false }
 ark-scale = { version = "0.0.11", default-features = false }
-sp-ark-bls12-381 = { git = "https://github.com/paritytech/arkworks-substrate", package = "sp-ark-bls12-381", default-features = false }
 ark-bls12-381 = { version = "0.4.0", default-features = false }
 ark-serialize = { version = "0.4.0", default-features = false }
 ark-ff = { version = "0.4.0", default-features = false }

Cargo.toml

@@ -17,7 +17,7 @@ scale-info = { workspace = true, features = ["derive"] }
 serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true
 log.workspace = true
-hex = { workspace = true, features = ["serde"] }
+hex = { workspace = true, features = ["serde", "alloc"] }
 sha2.workspace = true
 anyhow.workspace = true
 # frame deps
@@ -29,7 +29,7 @@ sp-io.workspace = true
 sp-runtime.workspace = true
 sp-std.workspace = true
 # arkworks dependencies
-sp-ark-bls12-381.workspace = true
+sp-crypto-ec-utils = { workspace = true, features = ["bls12-381"] }
 ark-bls12-381 = { workspace = true, features = ["curve"] }
 ark-serialize = { workspace = true, features = ["derive"] }
 ark-ff.workspace = true
@@ -64,7 +64,7 @@ std = [
 	"serde/std",
 	"serde_json/std",
 	"hex/std",
-	"sp-ark-bls12-381/std",
+	"sp-crypto-ec-utils/std",
 	"ark-bls12-381/std",
 	"ark-serialize/std",
 	"ark-ff/std",

pallets/drand/Cargo.toml

@@ -16,7 +16,7 @@
 
 use ark_ec::pairing::Pairing;
 use ark_std::{Zero, ops::Neg};
-use sp_ark_bls12_381::{
+use sp_crypto_ec_utils::bls12_381::{
     Bls12_381 as Bls12_381Opt, G1Affine as G1AffineOpt, G2Affine as G2AffineOpt,
 };
 

pallets/drand/src/bls12_381.rs

@@ -27,7 +27,7 @@ use ark_ec::{AffineRepr, hashing::HashToCurve};
 use ark_serialize::CanonicalSerialize;
 use codec::Decode;
 use sha2::{Digest, Sha256};
-use sp_ark_bls12_381::{G1Affine as G1AffineOpt, G2Affine as G2AffineOpt};
+use sp_crypto_ec_utils::bls12_381::{G1Affine as G1AffineOpt, G2Affine as G2AffineOpt};
 use tle::curves::drand::TinyBLS381;
 use w3f_bls::engine::EngineBLS;