Remove base64 dependency

We don't need base64 because rust-bitcoin already exposes a version of
that crate that we can use. Removing one more parallel dependency.

Author: rajarshimaitra

Cargo.lock

@@ -17,7 +17,6 @@ bdk-macros = "0.6"
 structopt = "0.3"
 serde_json = "1.0"
 log = "0.4"
-base64 = "0.11"
 zeroize = "<1.4.0"
 dirs-next = "2.0"
 env_logger = "0.7"

Cargo.toml

@@ -28,6 +28,7 @@ use bdk::{database::BatchDatabase, wallet::AddressIndex, Error, FeeRate, Keychai
 use structopt::StructOpt;
 
 use bdk::bitcoin::consensus::encode::{deserialize, serialize, serialize_hex};
+use bdk::bitcoin::base64;
 #[cfg(any(
     feature = "electrum",
     feature = "esplora",

src/handlers.rs

@@ -282,7 +282,7 @@ pub(crate) fn new_blockchain(
             &Secp256k1::new(),
         )?;
 
-        let rpc_url = "http://".to_string() + &url;
+        let rpc_url = "http://".to_string() + url;
 
         let rpc_config = RpcConfig {
             url: rpc_url,
@@ -295,7 +295,7 @@ pub(crate) fn new_blockchain(
         AnyBlockchainConfig::Rpc(rpc_config)
     };
 
-    Ok(AnyBlockchain::from_config(&config)?)
+    AnyBlockchain::from_config(&config)
 }
 
 /// Create a new wallet from given wallet configuration options