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44 lines
1.7 KiB
44 lines
1.7 KiB
#ifndef LIGHTNING_COMMON_FUNDING_TX_H
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#define LIGHTNING_COMMON_FUNDING_TX_H
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#include "config.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_tx;
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struct ext_key;
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struct privkey;
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struct pubkey;
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struct sha256_double;
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struct utxo;
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/**
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* funding_tx: create a P2WSH funding transaction for a channel.
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* @ctx: context to tal from.
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* @outnum: (out) txout (0 or 1) which is the funding output.
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* @utxomap: (in/out) tal_arr of UTXO pointers to spend (permuted to match)
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* @funding_satoshis: (in) satoshis to output.
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* @local_fundingkey: (in) local key for 2of2 funding output.
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* @remote_fundingkey: (in) remote key for 2of2 funding output.
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* @change_satoshis: (in) amount to send as change.
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* @changekey: (in) key to send change to (only used if change_satoshis != 0).
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* @bip32_base: (in) bip32 base for key derivation, or NULL.
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*
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* If bip32_base is supplied, scriptSig will be added for p2sh inputs: this
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* means our signing code will fail, but txid will be correct. If NULL,
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* the txid will be incorrect, by signing will succeed.
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*
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* This is done because all other txs have no scriptSig (being pure Segwit)
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* so our signature code simply asserts there's no scriptsig (which would
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* have to be removed for signing anyway). The funding transaction is
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* a special case because of the P2SH inputs.
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*/
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struct bitcoin_tx *funding_tx(const tal_t *ctx,
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u16 *outnum,
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const struct utxo **utxomap,
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u64 funding_satoshis,
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const struct pubkey *local_fundingkey,
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const struct pubkey *remote_fundingkey,
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u64 change_satoshis,
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const struct pubkey *changekey,
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const struct ext_key *bip32_base);
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#endif /* LIGHTNING_COMMON_FUNDING_TX_H */
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