chore: use core:: where applicable

Author: luisschwab

src/error.rs

@@ -2,14 +2,17 @@
 
 //! Error types for the Bitcoin RPC client.
 
+use core::fmt;
+use core::num::TryFromIntError;
+use std::io;
+
 use bitcoin::{consensus::encode::FromHexError, hex::HexToArrayError};
 #[cfg(feature = "28_0")]
 use corepc_types::v17::{GetBlockHeaderVerboseError, GetBlockVerboseOneError};
 #[cfg(not(feature = "28_0"))]
 use corepc_types::v30::{GetBlockHeaderVerboseError, GetBlockVerboseOneError};
 use corepc_types::{bitcoin, v30::GetBlockFilterError};
 use jsonrpc::serde_json;
-use std::{fmt, io, num::TryFromIntError};
 
 /// Result type alias for the RPC client.
 pub type Result<T> = std::result::Result<T, Error>;
@@ -69,7 +72,7 @@ impl fmt::Display for Error {
     }
 }
 
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
 
 // Conversions from other error types
 impl From<jsonrpc::Error> for Error {

tests/rpc_client.rs

@@ -4,9 +4,10 @@
 //!
 //! These tests require a running Bitcoin Core node in regtest mode. To setup, refer to [`corepc_node`].
 
+use core::str::FromStr;
+
 use bdk_bitcoind_client::{Auth, Client, Error};
 use corepc_types::bitcoin::{Amount, BlockHash, Txid};
-use std::str::FromStr;
 
 mod testenv;