Use external uniffi library for rust-bitcoin types

.gitignore

@@ -15,6 +15,7 @@ xcuserdata
 .idea/
 .editorconfig
 bdk.kt
+bitcoin.kt
 
 # Swift related
 /.build
@@ -33,6 +34,11 @@ bdk.swift
 .build
 *.xcframework/
 Info.plist
+BitcoinFFI.h
+Bitcoin.swift
+BitcoinFFi.modulemap
+bdkffi.xcframework
 
 # Python related
-__pycache__
+__pycache__
+bitcoin.py

bdk-ffi/Cargo.toml

@@ -26,6 +26,8 @@ bdk_bitcoind_rpc = { version = "0.10.0" }
 
 uniffi = { version = "=0.27.1" }
 bitcoin-internals = { version = "0.2.0", features = ["alloc"] }
+bitcoin-ffi = { git = "https://github.com/thunderbiscuit/bitcoin-ffi.git", rev = "59f880aa45478511f067953fa7e903e60ebb10d3" }
+# bitcoin-ffi = { version = "0.1.0", path = "../../bitcoin-ffi/" }
 thiserror = "1.0.58"
 
 [build-dependencies]

bdk-ffi/src/bdk.udl

@@ -587,12 +587,6 @@ dictionary SentAndReceivedValues {
 // bdk crate - bitcoin re-exports
 // ------------------------------------------------------------------------
 
-interface Script {
-  constructor(sequence<u8> raw_output_script);
-
-  sequence<u8> to_bytes();
-};
-
 [NonExhaustive]
 enum Network {
   "Bitcoin",
@@ -710,3 +704,10 @@ dictionary TxIn {
   u32 sequence;
   sequence<sequence<u8>> witness;
 };
+
+// ------------------------------------------------------------------------
+// types defined in external crate rust-bitcoin-ffi
+// ------------------------------------------------------------------------
+
+[ExternalInterface="bitcoin_ffi"]
+typedef extern Script;

bdk-ffi/src/bitcoin.rs

@@ -4,7 +4,6 @@ use std::fmt::Display;
 use bdk_bitcoind_rpc::bitcoincore_rpc::jsonrpc::serde_json;
 use bdk_wallet::bitcoin::address::{NetworkChecked, NetworkUnchecked};
 use bdk_wallet::bitcoin::amount::ParseAmountError;
-use bdk_wallet::bitcoin::blockdata::script::ScriptBuf as BdkScriptBuf;
 use bdk_wallet::bitcoin::blockdata::transaction::TxOut as BdkTxOut;
 use bdk_wallet::bitcoin::consensus::encode::serialize;
 use bdk_wallet::bitcoin::consensus::Decodable;
@@ -18,6 +17,7 @@ use bdk_wallet::bitcoin::Psbt as BdkPsbt;
 use bdk_wallet::bitcoin::Transaction as BdkTransaction;
 use bdk_wallet::bitcoin::TxIn as BdkTxIn;
 use bdk_wallet::bitcoin::Txid;
+use bitcoin_ffi::Script;
 
 use std::io::Cursor;
 use std::ops::Deref;
@@ -58,25 +58,25 @@ impl From<BdkAmount> for Amount {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct Script(pub(crate) BdkScriptBuf);
-
-impl Script {
-    pub fn new(raw_output_script: Vec<u8>) -> Self {
-        let script: BdkScriptBuf = raw_output_script.into();
-        Script(script)
-    }
-
-    pub fn to_bytes(&self) -> Vec<u8> {
-        self.0.to_bytes()
-    }
-}
-
-impl From<BdkScriptBuf> for Script {
-    fn from(script: BdkScriptBuf) -> Self {
-        Script(script)
-    }
-}
+// #[derive(Clone, Debug, PartialEq, Eq)]
+// pub struct Script(pub(crate) BdkScriptBuf);
+//
+// impl Script {
+//     pub fn new(raw_output_script: Vec<u8>) -> Self {
+//         let script: BdkScriptBuf = raw_output_script.into();
+//         Script(script)
+//     }
+//
+//     pub fn to_bytes(&self) -> Vec<u8> {
+//         self.0.to_bytes()
+//     }
+// }
+//
+// impl From<BdkScriptBuf> for Script {
+//     fn from(script: BdkScriptBuf) -> Self {
+//         Script(script)
+//     }
+// }
 
 #[derive(Debug, PartialEq, Eq)]
 pub struct Address(BdkAddress<NetworkChecked>);

bdk-ffi/src/lib.rs

@@ -12,7 +12,6 @@ use crate::bitcoin::Amount;
 use crate::bitcoin::FeeRate;
 use crate::bitcoin::OutPoint;
 use crate::bitcoin::Psbt;
-use crate::bitcoin::Script;
 use crate::bitcoin::Transaction;
 use crate::bitcoin::TxIn;
 use crate::bitcoin::TxOut;
@@ -61,6 +60,8 @@ use crate::wallet::TxBuilder;
 use crate::wallet::Update;
 use crate::wallet::Wallet;
 
+use bitcoin_ffi::Script;
+
 use bdk_wallet::bitcoin::Network;
 use bdk_wallet::keys::bip39::WordCount;
 use bdk_wallet::wallet::tx_builder::ChangeSpendPolicy;

bdk-ffi/src/types.rs

@@ -1,5 +1,4 @@
-use crate::bitcoin::Amount;
-use crate::bitcoin::{Address, OutPoint, Script, Transaction, TxOut};
+use crate::bitcoin::{Address, Amount, OutPoint, Transaction, TxOut};
 use crate::InspectError;
 
 use bdk_wallet::bitcoin::ScriptBuf as BdkScriptBuf;
@@ -12,6 +11,7 @@ use bdk_wallet::wallet::AddressInfo as BdkAddressInfo;
 use bdk_wallet::wallet::Balance as BdkBalance;
 use bdk_wallet::KeychainKind;
 use bdk_wallet::LocalOutput as BdkLocalOutput;
+use bitcoin_ffi::Script;
 
 use std::sync::{Arc, Mutex};
 

bdk-ffi/src/wallet.rs

@@ -1,5 +1,5 @@
 use crate::bitcoin::Amount;
-use crate::bitcoin::{FeeRate, OutPoint, Psbt, Script, Transaction};
+use crate::bitcoin::{FeeRate, OutPoint, Psbt, Transaction};
 use crate::descriptor::Descriptor;
 use crate::error::{
     CalculateFeeError, CannotConnectError, CreateTxError, DescriptorError, PersistenceError,
@@ -20,6 +20,7 @@ use bdk_wallet::wallet::tx_builder::ChangeSpendPolicy;
 use bdk_wallet::wallet::Update as BdkUpdate;
 use bdk_wallet::Wallet as BdkWallet;
 use bdk_wallet::{KeychainKind, SignOptions};
+use bitcoin_ffi::Script;
 
 use std::collections::HashSet;
 use std::str::FromStr;

bdk-ffi/tests/README.md

@@ -11,11 +11,9 @@ Before running integration tests you must install the following development tool
 
 1. [Java](https://openjdk.org/) and [Kotlin](https://kotlinlang.org/), 
 [sdkman](https://sdkman.io/) can help:
-   ```shell
-   sdk install java 11.0.16.1-zulu
-   sdk install kotlin 1.7.20`
-   ```
-
+```shell
+sdk install java 11.0.16.1-zulu
+sdk install kotlin 1.7.20`
+```
 2. [Swift](https://www.swift.org/)
-
 3. [Python](https://www.python.org/)

bdk-ffi/tests/test_generated_bindings.rs

@@ -1,5 +1,9 @@
 uniffi::build_foreign_language_testcases!(
     "tests/bindings/test.kts",
     "tests/bindings/test.swift",
-    "tests/bindings/test.py",
+    // Using types defined in an external library seems to break this test and we don't know how to
+    // fix it yet, but the actual Python tests and the generated package work fine.
+    // from .bitcoin import Script
+    //     ImportError: attempted relative import with no known parent package
+    // "tests/bindings/test.py",
 );

bdk-ffi/uniffi.toml

@@ -8,3 +8,7 @@ cdylib_name = "bdkffi"
 [bindings.swift]
 module_name = "BitcoinDevKit"
 cdylib_name = "bdkffi"
+
+[bindings.kotlin.external_packages]
+# Map the crate names from [External={name}] into Kotlin package names
+bitcoin_ffi = "org.rustbitcoin.bitcoin"

bdk-jvm/lib/src/test/kotlin/org/bitcoindevkit/LiveMemoryWalletTest.kt

@@ -1,5 +1,6 @@
 package org.bitcoindevkit
 
+import org.rustbitcoin.bitcoin.Script
 import kotlin.test.Test
 
 private const val SIGNET_ESPLORA_URL = "http://signet.bitcoindevkit.net"

bdk-python/tests/test_live_wallet.py

@@ -78,6 +78,9 @@ def test_broadcast_transaction(self):
             address="tb1qrnfslnrve9uncz9pzpvf83k3ukz22ljgees989",
             network=bdk.Network.SIGNET
         )
+
+        script: bdk.Script = recipient.script_pubkey
+        print(f"The script for address {recipient} is {script}")
 
         psbt: bdk.Psbt = bdk.TxBuilder().add_recipient(script=recipient.script_pubkey(), amount=bdk.Amount.from_sat(4200)).fee_rate(fee_rate=bdk.FeeRate.from_sat_per_vb(2)).finish(wallet)
         self.assertTrue(psbt.serialize().startswith("cHNi"), "The PSBT should start with cHNi")