+#[repr(C)]
+#[derive(Clone)]
+/// An input to a transaction.
+///
+/// This contains the witness, the scriptSig and the previous outpoint and represents a single
+/// input to a transaction
+pub struct TxIn {
+ /// The witness which includes any signatures required to spend a segwit output.
+ pub witness: Witness,
+ /// The script_sig which includes signatures requires to spend a pre-segwit output (or a
+ /// P2SH-wrapped segwit output).
+ pub script_sig: derived::CVec_u8Z,
+ /// The sequence number of the transaction input
+ pub sequence: u32,
+ /// The txid of the transaction being spent.
+ pub previous_txid: ThirtyTwoBytes,
+ /// The output index of the transaction being spent.
+ pub previous_vout: u32,
+}
+
+impl TxIn {
+ pub(crate) fn from_rust(txin: &::bitcoin::blockdata::transaction::TxIn) -> Self {
+ TxIn {
+ witness: Witness::from_bitcoin(&txin.witness),
+ script_sig: derived::CVec_u8Z::from(txin.script_sig.clone().into_bytes()),
+ sequence: txin.sequence.0,
+ previous_txid: ThirtyTwoBytes { data: txin.previous_output.txid.into_inner() },
+ previous_vout: txin.previous_output.vout,
+ }
+ }
+}
+
+#[no_mangle]
+/// Frees the witness and script_sig in a TxIn
+pub extern "C" fn TxIn_free(_res: TxIn) { }
+
+#[no_mangle]
+/// Convenience function for constructing a new TxIn
+pub extern "C" fn TxIn_new(witness: Witness, script_sig: derived::CVec_u8Z, sequence: u32, previous_txid: ThirtyTwoBytes, previous_vout: u32) -> TxIn {
+ TxIn { witness, script_sig, sequence, previous_txid, previous_vout }
+}
+
+