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88 lines
2.5 KiB
88 lines
2.5 KiB
#ifndef LIGHTNING_BITCOIN_TX_H
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#define LIGHTNING_BITCOIN_TX_H
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#include "config.h"
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#include "shadouble.h"
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#include "signature.h"
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#include "varint.h"
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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struct bitcoin_txid {
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struct sha256_double shad;
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};
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struct bitcoin_tx {
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u32 version;
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struct bitcoin_tx_input *input;
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struct bitcoin_tx_output *output;
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u32 lock_time;
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};
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struct bitcoin_tx_output {
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u64 amount;
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u8 *script;
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};
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struct bitcoin_tx_input {
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struct bitcoin_txid txid;
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u32 index; /* output number referred to by above */
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u8 *script;
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u32 sequence_number;
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/* Value of the output we're spending (NULL if unknown). */
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u64 *amount;
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/* Only if BIP141 used. */
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u8 **witness;
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};
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/* SHA256^2 the tx: simpler than sha256_tx */
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void bitcoin_txid(const struct bitcoin_tx *tx, struct bitcoin_txid *txid);
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/* Useful for signature code. */
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void sha256_tx_for_sig(struct sha256_double *h, const struct bitcoin_tx *tx,
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unsigned int input_num, const u8 *witness_script);
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/* Linear bytes of tx. */
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u8 *linearize_tx(const tal_t *ctx, const struct bitcoin_tx *tx);
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/* Get cost of tx in (x4 of non-witness bytecount). */
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size_t measure_tx_cost(const struct bitcoin_tx *tx);
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/* Allocate a tx: you just need to fill in inputs and outputs (they're
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* zeroed with inputs' sequence_number set to FFFFFFFF) */
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struct bitcoin_tx *bitcoin_tx(const tal_t *ctx, varint_t input_count,
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varint_t output_count);
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/* This takes a raw bitcoin tx in hex. */
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struct bitcoin_tx *bitcoin_tx_from_hex(const tal_t *ctx, const char *hex,
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size_t hexlen);
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/* Parse hex string to get txid (reversed, a-la bitcoind). */
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bool bitcoin_txid_from_hex(const char *hexstr, size_t hexstr_len,
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struct bitcoin_txid *txid);
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/* Get hex string of txid (reversed, a-la bitcoind). */
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bool bitcoin_txid_to_hex(const struct bitcoin_txid *txid,
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char *hexstr, size_t hexstr_len);
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/* Internal de-linearization functions. */
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struct bitcoin_tx *pull_bitcoin_tx(const tal_t *ctx,
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const u8 **cursor, size_t *max);
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/**
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* pull_bitcoin_tx_onto - De-serialize a bitcoin tx into tx
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*
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* Like pull_bitcoin_tx, but skips the allocation of tx. Used by the
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* wire implementation where the caller allocates, and the callee only
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* fills in values.
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*
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* @ctx: Allocation context
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* @cursor: buffer to read from
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* @max: Buffer size left to read
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* @tx (out): Destination transaction
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*/
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struct bitcoin_tx *pull_bitcoin_tx_onto(const tal_t *ctx, const u8 **cursor,
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size_t *max, struct bitcoin_tx *tx);
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#endif /* LIGHTNING_BITCOIN_TX_H */
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