chain: add base64 and rand-std features

The new chain features are required to build example_cli and dependent crates
independently of the bdk repo eworkspace.

crates/chain/Cargo.toml

@@ -32,4 +32,6 @@ proptest = "1.2.0"
 default = ["std", "miniscript"]
 std = ["bitcoin/std", "miniscript?/std"]
 serde = ["dep:serde", "bitcoin/serde", "miniscript?/serde"]
+base64 = ["bitcoin/base64"]
+rand-std = ["bitcoin/rand-std"]
 rusqlite = ["std", "dep:rusqlite", "serde", "serde_json"]

example-crates/example_cli/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-bdk_chain = { path = "../../crates/chain", features = ["serde", "miniscript"]}
+bdk_chain = { path = "../../crates/chain", features = ["serde", "miniscript", "base64", "rand-std"]}
 bdk_coin_select = "0.3.0"
 bdk_file_store = { path = "../../crates/file_store" }
 

example-crates/example_cli/src/lib.rs

@@ -667,15 +667,15 @@ pub fn handle_commands<CS: clap::Subcommand, S: clap::Args>(
                     // print base64 encoded psbt
                     let fee = psbt.fee()?.to_sat();
                     let mut obj = serde_json::Map::new();
-                    obj.insert("psbt".to_string(), json!(psbt.to_string()));
+                    obj.insert("psbt".to_string(), json!(psbt));
                     obj.insert("fee".to_string(), json!(fee));
                     println!("{}", serde_json::to_string_pretty(&obj)?);
                 };
 
                 Ok(())
             }
             PsbtCmd::Sign { psbt, descriptor } => {
-                let mut psbt = Psbt::from_str(&psbt.unwrap_or_default())?;
+                let mut psbt = Psbt::from_str(psbt.unwrap_or_default().as_str())?;
 
                 let desc_str = match descriptor {
                     Some(s) => s,
@@ -717,7 +717,7 @@ pub fn handle_commands<CS: clap::Subcommand, S: clap::Args>(
                 chain_specific,
                 psbt,
             } => {
-                let mut psbt = Psbt::from_str(&psbt)?;
+                let mut psbt = Psbt::from_str(&psbt.as_str())?;
                 psbt.finalize_mut(&Secp256k1::new())
                     .map_err(|errors| anyhow::anyhow!("failed to finalize PSBT {errors:?}"))?;