feat(psbt): Introduce PsbtParams

We add the `psbt::params` module along with new types
including `PsbtParams`, `ReplaceParams`, and `SelectionStrategy`.

`PsbtParams` is mostly inspired by `TxParams` from `tx_builder.rs`,
except that we've removed support for `policy_path` in favor of
`add_assets` API. Further enhancements include `.utxo_filter` and
`.canonical_params` member fields.

In `lib.rs` re-export everything under `psbt` module.

- deps: Add `bdk_tx` 0.1.0
- deps: Add `bdk_coin_select` 0.4.1

Author: ValuedMammal

Cargo.toml

@@ -18,6 +18,8 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 bdk_chain = { version = "0.23.1", features = ["miniscript", "serde"], default-features = false }
+bdk_coin_select = { version = "0.4.1" }
+bdk_tx = { version = "0.1.0" }
 bitcoin = { version = "0.32.7", features = ["serde", "base64"], default-features = false }
 miniscript = { version = "12.3.1", features = ["serde"], default-features = false }
 rand_core = { version = "0.6.0" }

src/lib.rs

@@ -45,6 +45,7 @@ pub use bdk_chain::rusqlite;
 pub use bdk_chain::rusqlite_impl;
 pub use descriptor::template;
 pub use descriptor::HdKeyPaths;
+pub use psbt::*;
 pub use signer;
 pub use signer::SignOptions;
 pub use tx_builder::*;

src/psbt/mod.rs

@@ -17,6 +17,11 @@ use bitcoin::FeeRate;
 use bitcoin::Psbt;
 use bitcoin::TxOut;
 
+#[allow(unused)]
+mod params;
+
+pub use params::*;
+
 // TODO upstream the functions here to `rust-bitcoin`?
 
 /// Trait to add functions to extract utxos and calculate fees.