Ethereum account

__mocks__/cairo/ethSigner/testEthPubKey.cairo

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+// Cairo 2.5.3
+use openzeppelin::account::interface::EthPublicKey;
+use starknet::SyscallResultTrait;
+use starknet::secp256_trait::Secp256PointTrait;
+use starknet::secp256k1::{
+    Secp256k1Point, secp256k1_get_point_from_x_syscall, secp256k1_new_syscall
+};
+
+impl Secp256k1PointSerde of Serde<EthPublicKey> {
+    fn serialize(self: @Secp256k1Point, ref output: Array<felt252>) {
+        let point = (*self).get_coordinates().unwrap();
+        point.serialize(ref output)
+    }
+    fn deserialize(ref serialized: Span<felt252>) -> Option<Secp256k1Point> {
+        let (x, y) = Serde::<(u256, u256)>::deserialize(ref serialized)?;
+        secp256k1_new_syscall(x, y).unwrap_syscall()
+    }
+}
+
+#[starknet::interface]
+trait IEthPub<TContractState> {
+    fn get_public_key(self: @TContractState) -> EthPublicKey;
+    fn set_public_key(ref self: TContractState, new_public_key: EthPublicKey);
+    fn test_public_key(self: @TContractState, my_pub_key:EthPublicKey) -> EthPublicKey;
+}
+#[starknet::contract]
+mod Eth_pub_key {
+    use openzeppelin::account::interface::EthPublicKey;
+    use openzeppelin::account::utils::secp256k1::{Secp256k1PointSerde, Secp256k1PointStorePacking};
+    use core::starknet::secp256_trait::Secp256PointTrait;
+    use core::starknet::secp256k1::Secp256k1Point;
+
+    #[storage]
+    struct Storage {
+        pubK: EthPublicKey,
+    }
+
+    #[abi(embed_v0)]
+    impl InteractEthPub of super::IEthPub<ContractState> {
+        fn get_public_key(self: @ContractState) -> EthPublicKey {
+            self.pubK.read()
+        }
+
+        fn set_public_key(ref self: ContractState, new_public_key: EthPublicKey) {
+            self.pubK.write(new_public_key)
+        }
+
+        fn test_public_key(self: @ContractState, my_pub_key:EthPublicKey) -> EthPublicKey {
+            my_pub_key
+        }
+    }
+}
+
+
+
+// to compile with scarb 2.5.3 :
+// Scarb.toml :
+// [package]
+// name = "pub_eth"
+// version = "0.1.0"
+// edition = "2023_10"
+
+// [dependencies]
+// starknet = "2.5.3"
+// openzeppelin = { git = "https://github.com/OpenZeppelin/cairo-contracts.git", tag = "v0.9.0" }
+
+// [lib]
+
+// [[target.starknet-contract]]
+// sierra = true
+// casm = true