mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
524849bc11
The deserialization of bitcoin transactions in wire/ is rather annoying in that we first allocate a new bitcoin_tx, then copy it's contents onto the destination and then still carry the newly allocated one around due to the tal-tree. This splits `pull_bitcoin_tx` into two: one part that does the allocation and another one that proceeds to parse. Signed-off-by: Christian Decker <decker.christian@gmail.com>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
#ifndef LIGHTNING_BITCOIN_TX_H
|
|
#define LIGHTNING_BITCOIN_TX_H
|
|
#include "config.h"
|
|
#include "shadouble.h"
|
|
#include "signature.h"
|
|
#include "varint.h"
|
|
#include <ccan/short_types/short_types.h>
|
|
#include <ccan/tal/tal.h>
|
|
|
|
struct bitcoin_txid {
|
|
struct sha256_double shad;
|
|
};
|
|
|
|
struct bitcoin_tx {
|
|
u32 version;
|
|
struct bitcoin_tx_input *input;
|
|
struct bitcoin_tx_output *output;
|
|
u32 lock_time;
|
|
};
|
|
|
|
struct bitcoin_tx_output {
|
|
u64 amount;
|
|
u8 *script;
|
|
};
|
|
|
|
struct bitcoin_tx_input {
|
|
struct bitcoin_txid txid;
|
|
u32 index; /* output number referred to by above */
|
|
u8 *script;
|
|
u32 sequence_number;
|
|
|
|
/* Value of the output we're spending (NULL if unknown). */
|
|
u64 *amount;
|
|
|
|
/* Only if BIP141 used. */
|
|
u8 **witness;
|
|
};
|
|
|
|
|
|
/* SHA256^2 the tx: simpler than sha256_tx */
|
|
void bitcoin_txid(const struct bitcoin_tx *tx, struct bitcoin_txid *txid);
|
|
|
|
/* Useful for signature code. */
|
|
void sha256_tx_for_sig(struct sha256_double *h, const struct bitcoin_tx *tx,
|
|
unsigned int input_num, const u8 *witness_script);
|
|
|
|
/* Linear bytes of tx. */
|
|
u8 *linearize_tx(const tal_t *ctx, const struct bitcoin_tx *tx);
|
|
|
|
/* Get cost of tx in (x4 of non-witness bytecount). */
|
|
size_t measure_tx_cost(const struct bitcoin_tx *tx);
|
|
|
|
/* Allocate a tx: you just need to fill in inputs and outputs (they're
|
|
* zeroed with inputs' sequence_number set to FFFFFFFF) */
|
|
struct bitcoin_tx *bitcoin_tx(const tal_t *ctx, varint_t input_count,
|
|
varint_t output_count);
|
|
|
|
/* This takes a raw bitcoin tx in hex. */
|
|
struct bitcoin_tx *bitcoin_tx_from_hex(const tal_t *ctx, const char *hex,
|
|
size_t hexlen);
|
|
|
|
/* Parse hex string to get txid (reversed, a-la bitcoind). */
|
|
bool bitcoin_txid_from_hex(const char *hexstr, size_t hexstr_len,
|
|
struct bitcoin_txid *txid);
|
|
|
|
/* Get hex string of txid (reversed, a-la bitcoind). */
|
|
bool bitcoin_txid_to_hex(const struct bitcoin_txid *txid,
|
|
char *hexstr, size_t hexstr_len);
|
|
|
|
/* Internal de-linearization functions. */
|
|
struct bitcoin_tx *pull_bitcoin_tx(const tal_t *ctx,
|
|
const u8 **cursor, size_t *max);
|
|
|
|
/**
|
|
* pull_bitcoin_tx_onto - De-serialize a bitcoin tx into tx
|
|
*
|
|
* Like pull_bitcoin_tx, but skips the allocation of tx. Used by the
|
|
* wire implementation where the caller allocates, and the callee only
|
|
* fills in values.
|
|
*
|
|
* @ctx: Allocation context
|
|
* @cursor: buffer to read from
|
|
* @max: Buffer size left to read
|
|
* @tx (out): Destination transaction
|
|
*/
|
|
struct bitcoin_tx *pull_bitcoin_tx_onto(const tal_t *ctx, const u8 **cursor,
|
|
size_t *max, struct bitcoin_tx *tx);
|
|
#endif /* LIGHTNING_BITCOIN_TX_H */
|