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p2tr script utilities

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This commit is contained in:
Greg Sanders
2023-07-11 01:54:43 +09:30
committed by Rusty Russell
parent 0097e2c666
commit 3c689cdaff
2 changed files with 110 additions and 2 deletions
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24
bitcoin/script.h
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@@ -63,6 +63,19 @@ u8 *scriptpubkey_p2wpkh_derkey(const tal_t *ctx, const u8 der[33]);
u8 *scriptpubkey_witness_raw(const tal_t *ctx, u8 version,
const u8 *wprog, size_t wprog_size);
/* Create an output script for a "raw"(perhaps already tweaked) taproot output pubkey */
u8 *scriptpubkey_raw_p2tr(const tal_t *ctx, const struct pubkey *output_pubkey);
/* Same as above, but compressed key is DER-encoded. */
u8 *scriptpubkey_raw_p2tr_derkey(const tal_t *ctx, const u8 output_der[33]);
/* Create an output script for an internal taproot pubkey. Results in different script than
* scriptpubkey_raw_p2tr! TODO support merkle root tweaking */
u8 *scriptpubkey_p2tr(const tal_t *ctx, const struct pubkey *inner_pubkey);
/* Same as above, but compressed key is DER-encoded. TODO support merkle root tweaking */
u8 *scriptpubkey_p2tr_derkey(const tal_t *ctx, const u8 inner_der[33]);
/* To-remotekey with csv max(lease_expiry - blockheight, 1) delay. */
u8 *bitcoin_wscript_to_remote_anchored(const tal_t *ctx,
const struct pubkey *remote_key,
@@ -157,9 +170,15 @@ bool is_p2wsh(const u8 *script, struct sha256 *addr);
/* Is this (version 0) pay to witness pubkey hash? (extract addr if not NULL) */
bool is_p2wpkh(const u8 *script, struct bitcoin_address *addr);
/* Is this one of the four above script types? */
/* Is this a taproot output? (extract xonly_pubkey bytes if not NULL) */
bool is_p2tr(const u8 *script, u8 xonly_pubkey[32]);
/* Is this one of the above script types? */
bool is_known_scripttype(const u8 *script);
/* Is this a witness script type? */
bool is_known_segwit_scripttype(const u8 *script);
/* Is this a to-remote witness script (used for option_anchor_outputs)? */
bool is_to_remote_anchored_witness_script(const u8 *script, size_t script_len);
@@ -184,4 +203,7 @@ void script_push_bytes(u8 **scriptp, const void *mem, size_t len);
/* OP_0 + PUSH(32-byte-hash) */
#define BITCOIN_SCRIPTPUBKEY_P2WSH_LEN (1 + 1 + 32)
/* OP_1 + PUSH(32-byte-key) */
#define BITCOIN_SCRIPTPUBKEY_P2TR_LEN (1 + 1 + 32)
#endif /* LIGHTNING_BITCOIN_SCRIPT_H */