Make serde dependency optional

Author: stevenroose

Cargo.toml

@@ -10,12 +10,17 @@ description = "Wallet library for Bitcoin"
 keywords = [ "crypto", "bitcoin" ]
 readme = "README.md"
 
+[features]
+use-serde = ["serde", "bitcoin/use-serde"]
+
 [dependencies]
-bitcoin = { version = "0.23", features = ["use-serde"] }
+bitcoin = "0.23"
 rand = "0.7"
 rust-crypto = "0.2"
-serde = { version = "1", features = ["derive"] }
+
+serde = { version = "1", optional = true, features = ["derive"] }
 
 [dev-dependencies]
 bitcoin = { version = "0.23", features = ["use-serde", "bitcoinconsensus"] }
+serde = { version = "1", features = ["derive"] }
 serde_json = "1"

src/account.rs

@@ -758,7 +758,8 @@ impl Account {
 }
 
 /// instantiated key of an account
-#[derive(Clone, Serialize, Deserialize)]
+#[derive(Clone)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct InstantiatedKey {
     pub public: PublicKey,
     pub script_code: Script,

src/lib.rs

@@ -24,6 +24,8 @@
 pub extern crate bitcoin;
 pub extern crate crypto;
 extern crate rand;
+
+#[cfg(feature = "serde")]
 #[macro_use]
 extern crate serde;
 

src/proved.rs

@@ -22,7 +22,8 @@ use bitcoin::hashes::{sha256d, Hash, HashEngine};
 use bitcoin::{BitcoinHash, Block, Transaction};
 
 /// A confirmed transaction with its SPV proof
-#[derive(Clone, Serialize, Deserialize, Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Eq, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct ProvedTransaction {
     transaction: Transaction,
     merkle_path: Vec<(bool, sha256d::Hash)>,