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4b02c6f558
I got confused navigating these, especially since Alpha and Bitcoin have diverged (BIP68 was proposed after Elements Alpha). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
#ifndef LIGHTNING_BITCOIN_TX_H
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#define LIGHTNING_BITCOIN_TX_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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#include "shadouble.h"
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/* We unpack varints for our in-memory representation */
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#define varint_t u64
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struct bitcoin_tx {
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u32 version;
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varint_t input_count;
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struct bitcoin_tx_input *input;
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/* Only in alpha. */
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u64 fee;
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varint_t output_count;
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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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varint_t script_length;
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u8 *script;
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};
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struct bitcoin_tx_input {
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/* In alpha, this is hashed for signature */
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u64 input_amount;
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struct sha256_double txid;
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u32 index; /* output number referred to by above */
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varint_t script_length;
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u8 *script;
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u32 sequence_number;
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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 sha256_double *txid);
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/* Useful for signature code. */
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void sha256_tx_for_sig(struct sha256_ctx *ctx, const struct bitcoin_tx *tx,
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unsigned int input_num);
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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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/* 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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struct bitcoin_tx *bitcoin_tx_from_file(const tal_t *ctx,
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const char *filename);
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bool bitcoin_tx_write(int fd, const struct bitcoin_tx *tx);
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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 sha256_double *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 sha256_double *txid,
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char *hexstr, size_t hexstr_len);
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#endif /* LIGHTNING_BITCOIN_TX_H */
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