bitcoin_transaction_utils/
lib.rs

1pub fn is_transaction_hex_segwit(transaction_hex: &String) -> bool {
2    fn get_5th_byte(hex: &String) -> String {
3        let format = format!(
4            "{}{}",
5            hex.chars().nth(8).unwrap(),
6            hex.chars().nth(9).unwrap()
7        );
8        format
9    }
10    let fifth_byte = get_5th_byte(transaction_hex);
11    fifth_byte == "00"
12}
13
14#[cfg(test)]
15mod tests {
16    use super::*;
17
18    #[test]
19    fn it_works() {
20        let segwit_transaction_hex = "020000000001017fc0bfbe2b2e06e33723bec965db6f99edfcfdf0eb17a70b3bd4f708a02052830100000000ffffffff02a078aa000000000017a9144417c11f4b80a25b559e56df5daf9e715eaa27228721732301000000001600140f410abac0a0de8320891834565410bb010cda2602483045022100fe4b42cfc8390a00c1eb32da5ce2805f0321cdb0f2404210e94120fd6e48a55002204bee731f2f9fc0b2449266664669c7f99eb832b65c006fc8bcb5bc33b5a971d00121020b6ce55fabe6456bda581678a78276ce8c0c8a4799ada99f835342263d2e2d9100000000".to_string();
21        let non_segwit_transaction_hex = "0100000001f5bf38188b302dc80f5b0f979a924736dd6a48f95931c51e7182c75229957ccd000000006b483045022100ea408778a04d6c3d23c5184631b811d484480c7259e37c1ef5c29dbf1e05749d022038ac87e2327aa82e8fa5dc7c4d63fd70cd4b8eee2a7222fcc31151e4c935985f01210369e03e2c91f0badec46c9c903d9e9edae67c167b9ef9b550356ee791c9a40896ffffffff02d2b6f601000000001976a9149f21a07a0c7c3cf65a51f586051395762267cdaf88ac48720900000000001976a9145ac4968f9d4061da0023e6e204e22a1a2182820488ac00000000".to_string();
22        assert_eq!(is_transaction_hex_segwit(&segwit_transaction_hex), true);
23        assert_eq!(
24            is_transaction_hex_segwit(&non_segwit_transaction_hex),
25            false
26        );
27    }
28}