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122 lines
3.1 KiB
122 lines
3.1 KiB
#include "txfilter.h"
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#include <bitcoin/script.h>
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#include <ccan/build_assert/build_assert.h>
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#include <ccan/crypto/ripemd160/ripemd160.h>
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#include <ccan/mem/mem.h>
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#include <common/memleak.h>
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#include <common/pseudorand.h>
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#include <common/utils.h>
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#include <wallet/wallet.h>
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struct txfilter {
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const u8 **scriptpubkeys;
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};
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struct outpointfilter_entry {
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struct bitcoin_txid txid;
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u32 outnum;
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};
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static size_t outpoint_hash(const struct outpointfilter_entry *out)
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{
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struct siphash24_ctx ctx;
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siphash24_init(&ctx, siphash_seed());
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siphash24_update(&ctx, &out->txid, sizeof(out->txid));
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siphash24_u32(&ctx, out->outnum);
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return siphash24_done(&ctx);
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}
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static bool outpoint_eq(const struct outpointfilter_entry *o1,
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const struct outpointfilter_entry *o2)
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{
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return bitcoin_txid_eq(&o1->txid, &o2->txid) && o1->outnum == o2->outnum;
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}
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static const struct outpointfilter_entry *outpoint_keyof(const struct outpointfilter_entry *out)
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{
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return out;
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}
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HTABLE_DEFINE_TYPE(struct outpointfilter_entry, outpoint_keyof, outpoint_hash, outpoint_eq,
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outpointset);
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struct outpointfilter {
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struct outpointset *set;
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};
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struct txfilter *txfilter_new(const tal_t *ctx)
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{
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struct txfilter *filter = tal(ctx, struct txfilter);
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filter->scriptpubkeys = tal_arr(filter, const u8 *, 0);
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return filter;
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}
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void txfilter_add_scriptpubkey(struct txfilter *filter, const u8 *script TAKES)
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{
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tal_arr_expand(&filter->scriptpubkeys,
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tal_dup_arr(filter, u8, script, tal_count(script), 0));
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}
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void txfilter_add_derkey(struct txfilter *filter,
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const u8 derkey[PUBKEY_DER_LEN])
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{
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u8 *skp, *p2sh;
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skp = scriptpubkey_p2wpkh_derkey(tmpctx, derkey);
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p2sh = scriptpubkey_p2sh(tmpctx, skp);
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txfilter_add_scriptpubkey(filter, take(skp));
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txfilter_add_scriptpubkey(filter, take(p2sh));
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}
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bool txfilter_match(const struct txfilter *filter, const struct bitcoin_tx *tx)
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{
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for (size_t i = 0; i < tal_count(tx->output); i++) {
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u8 *oscript = tx->output[i].script;
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for (size_t j = 0; j < tal_count(filter->scriptpubkeys); j++) {
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if (scripteq(oscript, filter->scriptpubkeys[j]))
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return true;
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}
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}
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return false;
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}
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void outpointfilter_add(struct outpointfilter *of, const struct bitcoin_txid *txid, const u32 outnum)
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{
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struct outpointfilter_entry *op;
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if (outpointfilter_matches(of, txid, outnum))
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return;
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/* Have to mark the entries as notleak since they'll not be
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* pointed to by anything other than the htable */
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op = notleak(tal(of->set, struct outpointfilter_entry));
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op->txid = *txid;
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op->outnum = outnum;
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outpointset_add(of->set, op);
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}
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bool outpointfilter_matches(struct outpointfilter *of, const struct bitcoin_txid *txid, const u32 outnum)
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{
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struct outpointfilter_entry op;
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op.txid = *txid;
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op.outnum = outnum;
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return outpointset_get(of->set, &op) != NULL;
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}
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void outpointfilter_remove(struct outpointfilter *of, const struct bitcoin_txid *txid, const u32 outnum)
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{
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struct outpointfilter_entry op;
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op.txid = *txid;
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op.outnum = outnum;
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outpointset_del(of->set, &op);
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}
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struct outpointfilter *outpointfilter_new(tal_t *ctx)
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{
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struct outpointfilter *opf = tal(ctx, struct outpointfilter);
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opf->set = tal(opf, struct outpointset);
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outpointset_init(opf->set);
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return opf;
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}
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