Quick and dirty rustlang code used to create a transaction donating anyone-can-spend P2TR outputs (before taproot activation) to brink.dev https://b10c.me/blog/007-spending-p2tr-pre-activation/

main.rs

use core::str::FromStr;

use bitcoin::consensus::serialize;
use bitcoin::hash_types::{ScriptHash, Txid};
use bitcoin::hashes::hash160::Hash as Hash160;
use bitcoin::hashes::Hash;
use bitcoin::util::base58;
use bitcoin::{OutPoint, Script, Transaction, TxIn, TxOut};

fn main() {
    let first_p2tr_output_value = 5431;
    let first_p2tr_output = OutPoint::new(
        Txid::from_str("b53e3bc5edbb41b34a963ecf67eb045266cf841cab73a780940ce6845377f141").unwrap(),
        0,
    );

    let third_p2tr_output_value = 3656;
    let third_p2tr_output = OutPoint::new(
        Txid::from_str("b48a59fa9e036e997ba733904f631b1a64f5274be646698e49fd542141ca9404").unwrap(),
        0,
    );

    let fourth_p2tr_output_value = 50_000;
    let fourth_p2tr_output = OutPoint::new(
        Txid::from_str("7641c08f4bd299abfef26dcc6b477938f4a6c2eed2f224d1f5c1c86b4e09739d").unwrap(),
        1,
    );

    let fifth_p2tr_output_value = 100_000;
    let fifth_p2tr_output = OutPoint::new(
        Txid::from_str("fd43650477e0ba6825ae0482a8b0b2b509d5443fa2a8cdd101872752a9171dd6").unwrap(),
        1,
    );

    let input1 = TxIn {
        previous_output: third_p2tr_output,
        script_sig: Script::new(),
        sequence: 0xb10c,
        witness: vec![],
    };

    let input2 = TxIn {
        previous_output: fourth_p2tr_output,
        script_sig: Script::new(),
        sequence: 0xb10c,
        witness: vec![],
    };

    let input3 = TxIn {
        previous_output: fifth_p2tr_output,
        script_sig: Script::new(),
        sequence: 0xb10c,
        witness: vec![],
    };

    let brink_dev_donation_address = "3QdFzfpU3u92GeRN4U5pLLezbBaHbj2ppr";
    let address_bytes = base58::from_check(brink_dev_donation_address).unwrap();
    let script_hash = ScriptHash::from_hash(Hash160::from_slice(&address_bytes[1..]).unwrap());

    let donation_out = TxOut {
        value: first_p2tr_output_value
            + third_p2tr_output_value
            + fourth_p2tr_output_value
            + fifth_p2tr_output_value,
        script_pubkey: Script::new_p2sh(&script_hash),
    };

    let opreturn_out = TxOut {
        value: 0,
        script_pubkey: Script::new_op_return("https://b10c.me/7".as_bytes()),
    };

    let mut sequence_in_0 = 6817749;

    while sequence_in_0 < 0xFFFF_FFFFu32 {
        let input0 = TxIn {
            previous_output: first_p2tr_output,
            script_sig: Script::new(),
            sequence: sequence_in_0,
            witness: vec![],
        };

        let tx = Transaction {
            version: 1,
            lock_time: 45324,
            input: vec![input0, input1.clone(), input2.clone(), input3.clone()],
            output: vec![donation_out.clone(), opreturn_out.clone()],
        };

        if tx.txid()[29..] == vec![0x00, 0x0c, 0xb1] {
            println!("Sequence: {}", sequence_in_0);
            let tx_ser = serialize(&tx);
            println!("{} {}", tx.txid(), hex::encode(&tx_ser));
            break;
        }
        sequence_in_0 += 1;
    }
}

nice

I can use this to explain to my students