54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#include "bitcoin/script.h"
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#include "bitcoin/tx.h"
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#include "close_tx.h"
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#include "permute_tx.h"
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#include "protobuf_convert.h"
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struct bitcoin_tx *create_close_tx(const tal_t *ctx,
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const u8 *our_script,
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const u8 *their_script,
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const struct sha256_double *anchor_txid,
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unsigned int anchor_index,
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u64 anchor_satoshis,
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uint64_t to_us, uint64_t to_them,
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uint64_t dust_limit)
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{
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struct bitcoin_tx *tx;
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size_t num_outputs = 0;
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assert(to_us + to_them <= anchor_satoshis);
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/* Now create close tx: one input, two outputs. */
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tx = bitcoin_tx(ctx, 1, 2);
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/* Our input spends the anchor tx output. */
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tx->input[0].txid = *anchor_txid;
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tx->input[0].index = anchor_index;
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tx->input[0].amount = tal_dup(tx->input, u64, &anchor_satoshis);
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if (to_us >= dust_limit) {
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/* One output is to us. */
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tx->output[num_outputs].amount = to_us;
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tx->output[num_outputs].script = tal_dup_arr(tx, u8,
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our_script, tal_count(our_script), 0);
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num_outputs++;
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}
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if (to_them >= dust_limit) {
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/* Other output is to them. */
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tx->output[num_outputs].amount = to_them;
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tx->output[num_outputs].script = tal_dup_arr(tx, u8,
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their_script, tal_count(their_script),
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0);
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num_outputs++;
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}
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/* Can't have no outputs at all! */
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if (num_outputs == 0)
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return tal_free(tx);
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tal_resize(&tx->output, num_outputs);
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permute_outputs(tx->output, num_outputs, NULL);
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return tx;
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}
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