From ce34ec5c20f65ce923e9401f6e0a17efd4771956 Mon Sep 17 00:00:00 2001
From: aaravm <aarav.mehta.mat22@itbhu.ac.in>
Date: Fri, 5 Jul 2024 01:46:11 +0530
Subject: [PATCH] adding the initial version of taproot contract(not working rn

---
 .../taproot_contract/generate_descriptor.rs   | 105 ++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 taptrade-cli-demo/coordinator/src/taproot_contract/generate_descriptor.rs

diff --git a/taptrade-cli-demo/coordinator/src/taproot_contract/generate_descriptor.rs b/taptrade-cli-demo/coordinator/src/taproot_contract/generate_descriptor.rs
new file mode 100644
index 0000000..d630ae1
--- /dev/null
+++ b/taptrade-cli-demo/coordinator/src/taproot_contract/generate_descriptor.rs
@@ -0,0 +1,105 @@
+use bitcoin::util::address::Address;
+use bitcoin::util::psbt::{PartiallySignedTransaction, PSBTInput, PSBTOutput};
+use bitcoin::network::constants::Network;
+use bitcoin::blockdata::transaction::{Transaction, TxIn, TxOut};
+use bitcoin::blockdata::script::Builder;
+use bitcoin::consensus::encode;
+use miniscript::{Miniscript, Descriptor, DescriptorPublicKey, policy::Concrete};
+use miniscript::bitcoin::secp256k1::{Secp256k1, SecretKey, PublicKey, Message, Signature};
+use miniscript::bitcoin::util::bip32::{ExtendedPrivKey, ExtendedPubKey};
+use std::str::FromStr;
+
+async fn generate_taproot_PSBT() {
+    // Define the Miniscript policies
+    let policy_a = format!("and_v(v:pk({}),and_v(v:pk({}),after(144)))", coordinator_pub_key, maker_pub_key);
+    let policy_b = format!("and_v(v:pk({}),and_v(v:pk({}),pk({})))", maker_pub_key, taker_pub_key, coordinator_pub_key);
+    let policy_c = format!("and_v(v:pk({}),pk({}))", maker_pub_key, coordinator_pub_key);
+    let policy_d = format!("and_v(v:pk({}),pk({}))", taker_pub_key, coordinator_pub_key);
+    let policy_e = format!("and_v(v:pk({}),after(12228))", maker_pub_key);
+    let policy_f = format!("and_v(and_v(v:pk({}),v:pk({})),after(2048))", maker_pub_key, taker_pub_key);
+
+    // Compile the policies into Miniscript
+    let miniscript_a: Miniscript<DescriptorPublicKey> = policy_a.parse().unwrap().compile().unwrap();
+    let miniscript_b: Miniscript<DescriptorPublicKey> = policy_b.parse().unwrap().compile().unwrap();
+    let miniscript_c: Miniscript<DescriptorPublicKey> = policy_c.parse().unwrap().compile().unwrap();
+    let miniscript_d: Miniscript<DescriptorPublicKey> = policy_d.parse().unwrap().compile().unwrap();
+    let miniscript_e: Miniscript<DescriptorPublicKey> = policy_e.parse().unwrap().compile().unwrap();
+    let miniscript_f: Miniscript<DescriptorPublicKey> = policy_f.parse().unwrap().compile().unwrap();
+
+    // Create the Taproot descriptors
+    let descriptor_a = Descriptor::Tr(coordinator_pub_key.clone(), vec![miniscript_a]);
+    let descriptor_b = Descriptor::Tr(coordinator_pub_key.clone(), vec![miniscript_b]);
+    let descriptor_c = Descriptor::Tr(coordinator_pub_key.clone(), vec![miniscript_c]);
+    let descriptor_d = Descriptor::Tr(coordinator_pub_key.clone(), vec![miniscript_d]);
+    let descriptor_e = Descriptor::Tr(coordinator_pub_key.clone(), vec![miniscript_e]);
+    let descriptor_f = Descriptor::Tr(coordinator_pub_key.clone(), vec![miniscript_f]);
+
+    // Generate the Taproot addresses
+    let address_a = Address::p2tr(&descriptor_a, Network::Bitcoin);
+    let address_b = Address::p2tr(&descriptor_b, Network::Bitcoin);
+    let address_c = Address::p2tr(&descriptor_c, Network::Bitcoin);
+    let address_d = Address::p2tr(&descriptor_d, Network::Bitcoin);
+    let address_e = Address::p2tr(&descriptor_e, Network::Bitcoin);
+    let address_f = Address::p2tr(&descriptor_f, Network::Bitcoin);
+
+    println!("Taproot Address A: {}", address_a);
+    println!("Taproot Address B: {}", address_b);
+    println!("Taproot Address C: {}", address_c);
+    println!("Taproot Address D: {}", address_d);
+    println!("Taproot Address E: {}", address_e);
+    println!("Taproot Address F: {}", address_f);
+
+    // Create a sample PSBT (Partially Signed Bitcoin Transaction)
+    let mut psbt = PartiallySignedTransaction {
+        global: Default::default(),
+        inputs: vec![],
+        outputs: vec![],
+    };
+
+    // Add an example input (Replace with actual input)
+    psbt.inputs.push(PSBTInput {
+        non_witness_utxo: None,
+        witness_utxo: Some(TxOut {
+            value: 1000,
+            script_pubkey: address_a.script_pubkey(),
+        }),
+        ..Default::default()
+    });
+
+    // Add the output addresses
+    psbt.outputs.push(PSBTOutput {
+        value: 1000,
+        script_pubkey: address_a.script_pubkey(),
+        ..Default::default()
+    });
+
+    psbt.outputs.push(PSBTOutput {
+        value: 1000,
+        script_pubkey: address_b.script_pubkey(),
+        ..Default::default()
+    });
+
+    psbt.outputs.push(PSBTOutput {
+        value: 1000,
+        script_pubkey: address_c.script_pubkey(),
+        ..Default::default()
+    });
+
+    psbt.outputs.push(PSBTOutput {
+        value: 1000,
+        script_pubkey: address_d.script_pubkey(),
+        ..Default::default()
+    });
+
+    psbt.outputs.push(PSBTOutput {
+        value: 1000,
+        script_pubkey: address_e.script_pubkey(),
+        ..Default::default()
+    });
+
+    psbt.outputs.push(PSBTOutput {
+        value: 1000,
+        script_pubkey: address_f.script_pubkey(),
+        ..Default::default()
+    });
+}
\ No newline at end of file