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wallet.c
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/*
The MIT License (MIT)
Copyright (c) 2016 Jonas Schnelli
Copyright (c) 2023 bluezr
Copyright (c) 2023-2024 The Dogecoin Foundation
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/
#include <assert.h>
#include <inttypes.h>
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#include <win/winunistd.h>
#else
#include <unistd.h>
#endif
#include <dogecoin/wallet.h>
#include <dogecoin/seal.h>
#define COINBASE_MATURITY 100
uint8_t WALLET_DB_REC_TYPE_MASTERPUBKEY = 0;
uint8_t WALLET_DB_REC_TYPE_PUBKEYCACHE = 1;
uint8_t WALLET_DB_REC_TYPE_ADDR = 1;
uint8_t WALLET_DB_REC_TYPE_TX = 2;
static const unsigned char file_hdr_magic[4] = {0xA8, 0xF0, 0x11, 0xC5}; /* header magic */
static const unsigned char file_rec_magic[4] = {0xC8, 0xF2, 0x69, 0x1E}; /* record magic */
static const uint32_t current_version = 1;
/**
* Prints an error message to the screen
*
* @param er The error message to display.
*
* @return Nothing.
*/
static bool showError(const char* er) {
printf("Error: %s\n", er);
return 1;
}
/* ====================== */
/* compare btree callback */
/* ====================== */
int dogecoin_wallet_addr_compare(const void *l, const void *r)
{
const dogecoin_wallet_addr *lm = l;
const dogecoin_wallet_addr *lr = r;
uint8_t *pubkeyA = (uint8_t *)lm->pubkeyhash;
uint8_t *pubkeyB = (uint8_t *)lr->pubkeyhash;
/* byte per byte compare */
/* TODO: switch to memcmp */
unsigned int i;
for (i = 0; i < sizeof(uint160); i++) {
uint8_t iA = pubkeyA[i];
uint8_t iB = pubkeyB[i];
if (iA > iB)
return -1;
else if (iA < iB)
return 1;
}
return 0;
}
int dogecoin_wtx_compare(const void *l, const void *r)
{
const dogecoin_wtx *lm = l;
const dogecoin_wtx *lr = r;
uint8_t *hashA = (uint8_t *)lm->tx_hash_cache;
uint8_t *hashB = (uint8_t *)lr->tx_hash_cache;
/* byte per byte compare */
unsigned int i;
for (i = 0; i < sizeof(uint256); i++) {
uint8_t iA = hashA[i];
uint8_t iB = hashB[i];
if (iA > iB)
return -1;
else if (iA < iB)
return 1;
}
return 0;
}
int dogecoin_utxo_compare(const void *l, const void *r)
{
const dogecoin_utxo *lm = l;
const dogecoin_utxo *lr = r;
uint8_t *hashA = (uint8_t *)lm->txid;
uint8_t *hashB = (uint8_t *)lr->txid;
/* byte per byte compare */
unsigned int i;
for (i = 0; i < sizeof(uint256); i++) {
uint8_t iA = hashA[i];
uint8_t iB = hashB[i];
if (iA > iB)
return -1;
else if (iA < iB)
return 1;
}
return 0;
}
int dogecoin_tx_outpoint_compare(const void *l, const void *r)
{
const dogecoin_tx_outpoint *lm = l;
const dogecoin_tx_outpoint *lr = r;
uint8_t *hashA = (uint8_t *)lm->hash;
uint8_t *hashB = (uint8_t *)lr->hash;
/* byte per byte compare */
unsigned int i;
for (i = 0; i < sizeof(uint256); i++) {
uint8_t iA = hashA[i];
uint8_t iB = hashB[i];
if (iA > iB)
return -1;
else if (iA < iB)
return 1;
}
if (lm->n > lr->n) {
return -1;
}
if (lm->n < lr->n) {
return 1;
}
return 0;
}
/*
==========================================================
WALLET TRANSACTION (WTX) FUNCTIONS
==========================================================
*/
dogecoin_wtx* dogecoin_wallet_wtx_new()
{
dogecoin_wtx* wtx;
wtx = dogecoin_calloc(1, sizeof(*wtx));
wtx->height = 0;
wtx->ignore = false;
dogecoin_hash_clear(wtx->blockhash);
dogecoin_hash_clear(wtx->tx_hash_cache);
wtx->tx = dogecoin_tx_new();
return wtx;
}
dogecoin_wtx* dogecoin_wallet_wtx_copy(dogecoin_wtx* wtx)
{
dogecoin_wtx* wtx_copy;
wtx_copy = dogecoin_wallet_wtx_new();
dogecoin_tx_copy(wtx_copy->tx, wtx->tx);
return wtx_copy;
}
void dogecoin_wallet_wtx_free(dogecoin_wtx* wtx)
{
dogecoin_tx_free(wtx->tx);
dogecoin_free(wtx);
}
void dogecoin_wallet_wtx_serialize(cstring* s, const dogecoin_wtx* wtx)
{
ser_u32(s, wtx->height);
ser_u256(s, wtx->tx_hash_cache);
dogecoin_tx_serialize(s, wtx->tx);
}
dogecoin_bool dogecoin_wallet_wtx_deserialize(dogecoin_wtx* wtx, struct const_buffer* buf)
{
deser_u32(&wtx->height, buf);
deser_u256(wtx->tx_hash_cache, buf);
return dogecoin_tx_deserialize(buf->p, buf->len, wtx->tx, NULL);
}
void dogecoin_wallet_wtx_cachehash(dogecoin_wtx* wtx) {
dogecoin_tx_hash(wtx->tx, wtx->tx_hash_cache);
}
/*
==========================================================
WALLET UNSPENT TX OUTPUT (UTXO) FUNCTIONS
==========================================================
*/
dogecoin_utxo* dogecoin_wallet_utxo_new() {
dogecoin_utxo* utxo = dogecoin_calloc(1, sizeof(dogecoin_utxo));
dogecoin_hash_clear(utxo->txid);
utxo->vout = 0;
dogecoin_mem_zero(&utxo->address, sizeof(utxo->address));
dogecoin_mem_zero(&utxo->script_pubkey, sizeof(utxo->script_pubkey));
dogecoin_mem_zero(&utxo->amount, sizeof(utxo->amount));
utxo->confirmations = 0;
utxo->spendable = true;
utxo->solvable = true;
return utxo;
}
dogecoin_utxo* new_dogecoin_utxo() {
dogecoin_utxo* utxo = dogecoin_wallet_utxo_new();
utxo->index = HASH_COUNT(utxos) + 1;
return utxo;
}
#define is_spent(x) (((dogecoin_utxo*)x)->spendable == false)
int start_dogecoin_utxo() {
dogecoin_utxo* m = new_dogecoin_utxo();
add_dogecoin_utxo(m);
return m->index;
}
void add_dogecoin_utxo(dogecoin_utxo* utxo_external) {
dogecoin_utxo* utxo_internal;
HASH_FIND_INT(utxos, &utxo_external->index, utxo_internal);
if (utxo_internal == NULL) {
HASH_ADD_INT(utxos, index, utxo_external);
} else {
HASH_REPLACE_INT(utxos, index, utxo_external, utxo_internal);
}
dogecoin_free(utxo_internal);
}
dogecoin_utxo* find_dogecoin_utxo(int index) {
dogecoin_utxo* utxo;
HASH_FIND_INT(utxos, &index, utxo);
return utxo;
}
void remove_dogecoin_utxo(dogecoin_utxo* utxo) {
HASH_DEL(utxos, utxo);
dogecoin_free(utxo);
}
void remove_all_utxos() {
dogecoin_utxo* utxo;
dogecoin_utxo* tmp;
HASH_ITER(hh, utxos, utxo, tmp) {
remove_dogecoin_utxo(utxo);
}
}
void dogecoin_wallet_utxo_free(dogecoin_utxo* utxo) {
dogecoin_free(utxo);
}
/*
==========================================================
WALLET ADDRESS (WALLET_ADDR) FUNCTIONS
==========================================================
*/
dogecoin_wallet_addr* dogecoin_wallet_addr_new()
{
dogecoin_wallet_addr* waddr;
waddr = dogecoin_calloc(1, sizeof(*waddr));
dogecoin_mem_zero(waddr->pubkeyhash, sizeof(waddr->pubkeyhash));
return waddr;
}
void dogecoin_wallet_addr_free(dogecoin_wallet_addr* waddr)
{
dogecoin_free(waddr);
}
void dogecoin_wallet_addr_serialize(cstring* s, const dogecoin_chainparams *params, const dogecoin_wallet_addr* waddr)
{
(void)(params);
ser_bytes(s, waddr->pubkeyhash, sizeof(uint160));
ser_bytes(s, (unsigned char *)&waddr->type, sizeof(uint8_t));
ser_u32(s, waddr->childindex);
ser_bytes(s, (unsigned char *)&waddr->ignore, sizeof(uint8_t));
}
dogecoin_bool dogecoin_wallet_addr_deserialize(dogecoin_wallet_addr* waddr, const dogecoin_chainparams *params, struct const_buffer* buf) {
(void)(params);
if (!deser_bytes(&waddr->pubkeyhash, buf, sizeof(uint160))) return false;
if (!deser_bytes((unsigned char *)&waddr->type, buf, sizeof(uint8_t))) return false;
if (!deser_u32(&waddr->childindex, buf)) return false;
if (!deser_bytes((unsigned char *)&waddr->ignore, buf, sizeof(uint8_t))) return false;
return true;
}
/*
==========================================================
WALLET OUTPUT (prev wtx + n) FUNCTIONS
==========================================================
*/
dogecoin_output* dogecoin_wallet_output_new()
{
dogecoin_output* output;
output = dogecoin_calloc(1, sizeof(*output));
output->i = 0;
output->wtx = dogecoin_wallet_wtx_new();
return output;
}
void dogecoin_wallet_output_free(dogecoin_output* output)
{
dogecoin_wallet_wtx_free(output->wtx);
dogecoin_free(output);
}
/*
==========================================================
WALLET CORE FUNCTIONS
==========================================================
*/
void set_wallet_filename(dogecoin_wallet* wallet, const dogecoin_chainparams *params) {
char path[256];
memcpy_safe(path, getcwd(path, 256), 256);
char* delim = NULL;
#ifdef WIN32
delim = "\\";
#else
delim = "/";
#endif
char* file_suffix = "_wallet.db";
size_t path_size = strlen(path);
size_t delim_size = strlen(delim);
size_t chain_size = strlen(params->chainname);
size_t file_size = strlen(file_suffix);
memcpy_safe((char*)wallet->filename, path, path_size);
memcpy_safe((char*)wallet->filename + path_size, delim, delim_size);
memcpy_safe((char*)wallet->filename + path_size + delim_size, params->chainname, chain_size);
memcpy_safe((char*)wallet->filename + path_size + delim_size + chain_size, file_suffix, file_size);
}
dogecoin_wallet* dogecoin_wallet_new(const dogecoin_chainparams *params)
{
dogecoin_wallet* wallet = dogecoin_calloc(1, sizeof(*wallet));
wallet->masterkey = NULL;
wallet->chain = params;
set_wallet_filename(wallet, params);
wallet->hdkeys_rbtree = 0;
wallet->utxos = 0;
wallet->unspent_rbtree = 0;
wallet->spends_rbtree = 0;
wallet->vec_wtxes = vector_new(10, (void (*)(void *)) dogecoin_wallet_wtx_free);
wallet->wtxes_rbtree = 0;
wallet->waddr_vector = vector_new(10, (void (*)(void *)) dogecoin_wallet_addr_free);
wallet->waddr_rbtree = 0;
return wallet;
}
dogecoin_wallet* dogecoin_wallet_init(const dogecoin_chainparams* chain, const char* address, const char* name, const char* mnemonic_in, const char* pass, const dogecoin_bool encrypted, const dogecoin_bool tpm, const int file_num, const dogecoin_bool master_key, const dogecoin_bool prompt) {
dogecoin_wallet* wallet = dogecoin_wallet_new(chain);
int error;
dogecoin_bool created;
char* wallet_suffix = "_wallet.db";
char* wallet_prefix = (char*)chain->chainname;
char* walletfile = NULL;
dogecoin_bool res = false;
if (mnemonic_in) {
char* wallet_type = "_mnemonic";
char* wallet_type_prefix = concat(wallet_prefix, wallet_type);
walletfile = concat(wallet_type_prefix, wallet_suffix);
dogecoin_free(wallet_type_prefix);
if (name) {
// Override wallet file name with name:
res = dogecoin_wallet_load(wallet, name, &error, &created, prompt);
}
else {
res = dogecoin_wallet_load(wallet, walletfile, &error, &created, prompt);
}
}
// else if name is set, use name for wallet file name:
else if (name) {
res = dogecoin_wallet_load(wallet, name, &error, &created, prompt);
}
else {
// use prefixed chain to wallet file name:
res = dogecoin_wallet_load(wallet, wallet->filename, &error, &created, prompt);
}
dogecoin_free(walletfile);
if (!res) {
showError("Loading wallet failed\n");
dogecoin_wallet_free(wallet);
return NULL;
}
if (created) {
// create a new key
dogecoin_hdnode node;
SEED seed;
if (mnemonic_in) {
// generate seed from mnemonic
if (dogecoin_seed_from_mnemonic(mnemonic_in, pass, seed) == -1) {
showError("Invalid mnemonic\n");
dogecoin_wallet_free(wallet);
return NULL;
}
} else if (encrypted && !master_key) {
dogecoin_bool tpmSuccess = false;
MNEMONIC mnemonic = {0};
if (tpm) {
// decrypt encrypted mnemonic with TPM
tpmSuccess = dogecoin_decrypt_mnemonic_with_tpm(mnemonic, file_num);
if (!tpmSuccess) {
printf("ERROR: Decrypting mnemonic from TPM failed\n");
printf("Trying to decrypt mnemonic from software...\n");
}
}
// decrypt encrypted mnemonic with software
if (!tpmSuccess) {
if (!dogecoin_decrypt_mnemonic_with_sw(mnemonic, file_num, NULL)) {
showError("Decrypting mnemonic from software failed\n");
dogecoin_wallet_free(wallet);
return NULL;
}
}
// generate seed from mnemonic
if (dogecoin_seed_from_mnemonic(mnemonic, pass, seed) == -1) {
showError("Invalid mnemonic\n");
dogecoin_wallet_free(wallet);
return NULL;
}
} else if (encrypted && master_key) {
dogecoin_bool tpmSuccess = false;
if (tpm) {
// decrypt encrypted master key with TPM
tpmSuccess = dogecoin_decrypt_hdnode_with_tpm(&node, file_num);
if (!tpmSuccess) {
printf("ERROR: Decrypting master key from TPM failed\n");
printf("Trying to decrypt master key from software...\n");
}
}
// decrypt encrypted master key with software
if (!tpmSuccess) {
if (!dogecoin_decrypt_hdnode_with_sw(&node, file_num, NULL)) {
showError("Decrypting master key from software failed\n");
dogecoin_wallet_free(wallet);
return NULL;
}
}
} else {
// generate a random seed if no mnemonic or master key
res = dogecoin_random_bytes(seed, sizeof(seed), true);
if (!res) {
showError("Generating random bytes failed\n");
dogecoin_wallet_free(wallet);
return NULL;
}
if (prompt) {
printf("Store seed in encrypted file? (Y/n): ");
char buffer[MAX_LEN];
int file_id = 0; // Variable to store file ID, defaulting to 0
// read user input
if (fgets(buffer, sizeof(buffer), stdin) != NULL) {
if (buffer[0] == 'Y' || buffer[0] == 'y') {
printf("Enter file ID (0-999): ");
if (fgets(buffer, sizeof(buffer), stdin) != NULL) {
file_id = atoi(buffer); // Update file_id with user input
}
printf("Overwrite file if found? (Y/n): ");
if (fgets(buffer, sizeof(buffer), stdin) != NULL) {
bool overwrite = (buffer[0] == 'Y' || buffer[0] == 'y');
// encrypt seed for storage with software
if (dogecoin_encrypt_seed_with_sw(seed, sizeof(seed), file_id, overwrite, NULL) == false) {
dogecoin_wallet_free(wallet);
return NULL;
}
}
}
}
}
}
if (!master_key) {
// generate hdnode from mnemonic or random seed
dogecoin_hdnode_from_seed(seed, sizeof(seed), &node);
}
dogecoin_wallet_set_master_key_copy(wallet, &node);
} else {
// ensure we have a key/address
if (wallet->masterkey == NULL && address == NULL) {
showError("No master key or address in wallet.\n");
dogecoin_wallet_free(wallet);
exit(EXIT_FAILURE);
}
}
if (address != NULL) {
char delim[] = " ";
// copy address into a new string, strtok modifies the string
char* address_copy = strdup(address);
char *ptr;
char* temp_address_copy = address_copy;
while((ptr = strtok_r(temp_address_copy, delim, &temp_address_copy)))
{
dogecoin_p2pkh_address_to_wallet(ptr, wallet);
}
dogecoin_free(address_copy);
}
#ifdef USE_UNISTRING
else if (wallet->waddr_vector->len == 0) {
int i=0;
for(;i<20;i++) {
dogecoin_wallet_next_bip44_addr(wallet);
}
}
#else
else if (wallet->waddr_vector->len == 0) {
dogecoin_wallet_next_addr(wallet);
}
#endif
return wallet;
}
void print_utxos(dogecoin_wallet* wallet) {
/* Creating a vector of addresses and storing them in the wallet. */
vector* addrs = vector_new(1, free);
dogecoin_wallet_get_addresses(wallet, addrs);
unsigned int i;
for (i = 0; i < addrs->len; i++) {
char* addr = vector_idx(addrs, i);
printf("address: %s\n", addr);
}
vector_free(addrs, true);
if (HASH_COUNT(utxos) > 0) {
char wallet_total[21];
dogecoin_mem_zero(wallet_total, 21);
uint64_t wallet_total_u64 = 0;
dogecoin_utxo* utxo;
dogecoin_utxo* tmp;
HASH_ITER(hh, utxos, utxo, tmp) {
if (is_spent(utxo)) {
printf("%s\n", "----------------------");
printf("txid: %s\n", utils_uint8_to_hex(utxo->txid, sizeof utxo->txid));
printf("vout: %d\n", utxo->vout);
printf("address: %s\n", utxo->address);
printf("script_pubkey: %s\n", utxo->script_pubkey);
printf("amount: %s\n", utxo->amount);
debug_print("confirmations: %d\n", utxo->confirmations);
printf("spendable: %d\n", utxo->spendable);
printf("solvable: %d\n", utxo->solvable);
wallet_total_u64 += coins_to_koinu_str(utxo->amount);
}
}
koinu_to_coins_str(wallet_total_u64, wallet_total);
printf("Spent Balance: %s\n", wallet_total);
dogecoin_mem_zero(wallet_total, 21);
wallet_total_u64 = 0;
HASH_ITER(hh, utxos, utxo, tmp) {
if (!is_spent(utxo)) {
printf("%s\n", "----------------------");
printf("txid: %s\n", utils_uint8_to_hex(utxo->txid, sizeof utxo->txid));
printf("vout: %d\n", utxo->vout);
printf("address: %s\n", utxo->address);
printf("script_pubkey: %s\n", utxo->script_pubkey);
printf("amount: %s\n", utxo->amount);
debug_print("confirmations: %d\n", utxo->confirmations);
printf("spendable: %d\n", utxo->spendable);
printf("solvable: %d\n", utxo->solvable);
wallet_total_u64 += coins_to_koinu_str(utxo->amount);
}
}
koinu_to_coins_str(wallet_total_u64, wallet_total);
printf("Unspent Balance: %s\n", wallet_total);
}
}
void dogecoin_wallet_free(dogecoin_wallet* wallet)
{
if (!wallet)
return;
if (wallet->dbfile) {
fclose(wallet->dbfile);
wallet->dbfile = NULL;
}
if (wallet->masterkey) {
dogecoin_hdnode_free(wallet->masterkey);
wallet->masterkey = NULL;
}
if (wallet->waddr_vector) {
vector_free(wallet->waddr_vector, true); // set to 'true' if vector owns the elements
wallet->waddr_vector = NULL;
}
if (wallet->vec_wtxes) {
vector_free(wallet->vec_wtxes, true); // set to 'true' if vector owns the elements
wallet->vec_wtxes = NULL;
}
wallet->chain = NULL;
// Destroy binary trees
dogecoin_btree_tdestroy(wallet->hdkeys_rbtree, NULL);
dogecoin_btree_tdestroy(wallet->unspent_rbtree, NULL);
dogecoin_btree_tdestroy(wallet->spends_rbtree, NULL);
dogecoin_btree_tdestroy(wallet->wtxes_rbtree, (void (*)(void *)) dogecoin_wallet_wtx_free);
dogecoin_btree_tdestroy(wallet->waddr_rbtree, NULL);
remove_all_utxos();
dogecoin_free(wallet);
}
void dogecoin_wallet_scrape_utxos(dogecoin_wallet* wallet, dogecoin_wtx* wtx) {
// needed in case someone spends excess utxo's:
size_t k = 0;
// iterate through vin's:
for (; k < wtx->tx->vin->len; k++) {
dogecoin_utxo* utxo;
dogecoin_utxo* tmp;
HASH_ITER(hh, utxos, utxo, tmp) {
// assign from vin's to dogecoin_tx_in:
dogecoin_tx_in* tx_in = vector_idx(wtx->tx->vin, k);
// uint8_t to char*:
char* prevout_hash = utils_uint8_to_hex(tx_in->prevout.hash, 32);
// reverse the characters:
utils_reverse_hex(prevout_hash, 64);
// copy back to uint8_t:
uint8_t prevout_hash_bytes[32] = {0};
memcpy(&prevout_hash_bytes, utils_hex_to_uint8(prevout_hash), 32);
// compare wtx->tx->vin->prevout.hash and prevout.n with utxo->txid and utxo->vout:
if (memcmp(&prevout_hash_bytes, utxo->txid, 32)==0 && (int)tx_in->prevout.n == utxo->vout) {
size_t n = 0;
dogecoin_utxo* spent_utxo;
dogecoin_utxo* spent_tmp;
HASH_ITER(hh, utxos, spent_utxo, spent_tmp) {
if (is_spent(spent_utxo) && memcmp((const uint8_t*)spent_utxo->txid, (const uint8_t*)utxo->txid, 32) == 0 && spent_utxo->vout == utxo->vout) {
n++;
}
}
if (n == 0) {
// prevent spending/solving:
utxo->spendable = 0;
utxo->solvable = 0;
}
}
}
}
size_t j = 0;
// iterate through vout's:
for (; j < wtx->tx->vout->len; j++) {
dogecoin_tx_out* tx_out = vector_idx(wtx->tx->vout, j);
// populate address vector if script_pubkey exists:
if (wallet->waddr_vector->len && tx_out->script_pubkey->len) {
char p2pkh_from_script_pubkey[P2PKHLEN];
// convert script pubkey hash to p2pkh address:
if (!dogecoin_pubkey_hash_to_p2pkh_address(tx_out->script_pubkey->str, tx_out->script_pubkey->len, p2pkh_from_script_pubkey, wallet->chain)) {
printf("failed to convert pubkey hash to p2pkh address!\n");
}
vector* addrs = vector_new(1, free);
// grab all addresses in vector:
dogecoin_wallet_get_addresses(wallet, addrs);
unsigned int i, g;
// loop through addresses:
for (i = 0; i < addrs->len; i++) {
char* addr = vector_idx(addrs, i);
// compare wtx->tx->vout with address from wallet->waddr_vector:
if (strncmp(p2pkh_from_script_pubkey, addr, P2PKHLEN - 1)==0) {
uint256 utxo_txid;
// make the txid:
dogecoin_tx_hash(wtx->tx, (uint8_t*)&utxo_txid);
// convert from uint8_t to char*
char* hexbuf = utils_uint8_to_hex((const uint8_t*)&utxo_txid, DOGECOIN_HASH_LENGTH);
// reverse txid with double length:
utils_reverse_hex(hexbuf, DOGECOIN_HASH_LENGTH*2);
// copy back to utxo->txid as uint256 (uint8_t* or uint8_t[32]):
memcpy_safe(utxo_txid, utils_hex_to_uint8(hexbuf), 32);
g = 0;
dogecoin_utxo* unspent_utxo;
dogecoin_utxo* unspent_tmp;
HASH_ITER(hh, utxos, unspent_utxo, unspent_tmp) {
if (!is_spent(unspent_utxo) && memcmp(unspent_utxo->txid, &utxo_txid, 32)==0 && (size_t)unspent_utxo->vout == j) {
g++;
}
}
dogecoin_utxo* spent_utxo;
dogecoin_utxo* spent_tmp;
HASH_ITER(hh, utxos, spent_utxo, spent_tmp) {
if (is_spent(spent_utxo) && memcmp(spent_utxo->txid, &utxo_txid, 32)==0 && (size_t)spent_utxo->vout == j) {
g++;
}
}
if (g == 0) {
// match so we populate utxo struct:
dogecoin_utxo* utxo = new_dogecoin_utxo();
memcpy_safe(utxo->txid, &utxo_txid, DOGECOIN_HASH_LENGTH);
// copy matching script_pubkey:
memcpy_safe(utxo->script_pubkey, utils_uint8_to_hex((const uint8_t*)tx_out->script_pubkey->str, tx_out->script_pubkey->len), SCRIPT_PUBKEY_STRINGLEN);
// set tx->tx_in->prevout.n (utxo->vout):
utxo->vout = j;
// set utxo p2pkh address:
memcpy_safe(utxo->address, p2pkh_from_script_pubkey, P2PKHLEN);
// set amount of utxo:
koinu_to_coins_str(tx_out->value, utxo->amount);
// finally add utxo to rbtree:
dogecoin_btree_tfind(utxo, &wallet->unspent_rbtree, dogecoin_utxo_compare);
add_dogecoin_utxo(utxo);
}
}
}
vector_free(addrs, true);
}
}
}
void dogecoin_wallet_add_wtx_intern_move(dogecoin_wallet *wallet, const dogecoin_wtx *wtx) {
// check if wtx already exists
dogecoin_wtx* checkwtx = dogecoin_btree_tfind(wtx, &wallet->wtxes_rbtree, dogecoin_wtx_compare);
if (checkwtx) {
// remove existing wtx
checkwtx = *(dogecoin_wtx **)checkwtx;
unsigned int i;
for (i = 0; i < wallet->vec_wtxes->len; i++) {
dogecoin_wtx *wtx_vec = vector_idx(wallet->vec_wtxes, i);
if (wtx_vec == checkwtx) {
vector_remove_idx(wallet->vec_wtxes, i);
}
}
// we do not really delete transactions
checkwtx->ignore = true;
dogecoin_btree_tdelete(checkwtx, &wallet->wtxes_rbtree, dogecoin_wtx_compare);
dogecoin_wallet_wtx_free(checkwtx);
}
dogecoin_btree_tfind(wtx, &wallet->wtxes_rbtree, dogecoin_wtx_compare);
vector_add(wallet->vec_wtxes, (dogecoin_wtx *)wtx);
}
dogecoin_bool dogecoin_wallet_create(dogecoin_wallet* wallet, const char* file_path, int *error)
{
if (!wallet)
return false;
struct stat buffer;
if (stat(file_path, &buffer) != 0) {
*error = 1;
return false;
}
// open wallet file if not already open
if (!wallet->dbfile) {
memcpy_safe((char*)wallet->filename, file_path, strlen(file_path));
wallet->dbfile = fopen(file_path, "a+b");
}
// write file-header-magic
if (fwrite(file_hdr_magic, 4, 1, wallet->dbfile) != 1) return false;
// write version
uint32_t v = htole32(current_version);
if (fwrite(&v, sizeof(v), 1, wallet->dbfile) != 1) return false;
// write genesis
if (fwrite(wallet->chain->genesisblockhash, sizeof(uint256), 1, wallet->dbfile ) != 1) return false;
dogecoin_file_commit(wallet->dbfile);
return true;
}
dogecoin_bool dogecoin_load_wallet_masterpubkey(dogecoin_wallet* wallet) {
if (!wallet) return false;
uint32_t len;
char strbuf[196];
char strbuf_check[196];
dogecoin_mem_zero(strbuf, sizeof(strbuf));
dogecoin_mem_zero(strbuf_check, sizeof(strbuf_check));
if (!deser_varlen_from_file(&len, wallet->dbfile)) return false;
if (len > sizeof(strbuf)) { return false; }
if (fread(strbuf, len, 1, wallet->dbfile) != 1) return false;
if (!deser_varlen_from_file(&len, wallet->dbfile)) return false;
if (len > sizeof(strbuf_check)) { return false; }
if (fread(strbuf_check, len, 1, wallet->dbfile) != 1) return false;
if (strcmp(strbuf, strbuf_check) != 0) {
fprintf(stderr, "Wallet file: xpub check failed, corrupt wallet detected.\n");
return false;
}
wallet->masterkey = dogecoin_hdnode_new();
dogecoin_hdnode_deserialize(strbuf, wallet->chain, wallet->masterkey);
return true;
}
dogecoin_bool dogecoin_wallet_load_address(dogecoin_wallet* wallet) {
if (!wallet) return false;
dogecoin_wallet_addr* waddr = dogecoin_wallet_addr_new();
size_t addr_len = 20+1+4+1;
unsigned char* buf = dogecoin_uchar_vla(addr_len);
struct const_buffer cbuf = {buf, addr_len};
if (fread(buf, addr_len, 1, wallet->dbfile) != 1) {
dogecoin_wallet_addr_free(waddr);
return false;
}
dogecoin_wallet_addr_deserialize(waddr, wallet->chain, &cbuf);
dogecoin_free(buf);
if (!waddr->ignore) {
// add the node to the binary tree
dogecoin_btree_tsearch(waddr, &wallet->waddr_rbtree, dogecoin_wallet_addr_compare);
vector_add(wallet->waddr_vector, waddr);
wallet->next_childindex = waddr->childindex+1;
}
return true;
}
dogecoin_bool dogecoin_wallet_load_transaction(dogecoin_wallet* wallet, uint32_t reclen) {
if (!wallet) return false;
unsigned char* buf = dogecoin_uchar_vla(reclen);
struct const_buffer cbuf = {buf, reclen};
if (fread(buf, reclen, 1, wallet->dbfile) != 1) return false;
dogecoin_wtx *wtx = dogecoin_wallet_wtx_new();
if (!dogecoin_wallet_wtx_deserialize(wtx, &cbuf)) return false;
dogecoin_free(buf);
dogecoin_wallet_scrape_utxos(wallet, wtx);
dogecoin_wallet_add_wtx_intern_move(wallet, wtx); // hands memory management over to the binary tree
return true;
}
// dogecoin_bool dogecoin_wallet_replace(dogecoin_wallet* wallet, const char* file_path, cstring* record, uint8_t record_type, int *error)
// {
// if (!wallet) return false;
// struct stat buffer;
// if (stat(file_path, &buffer) != 0) {
// *error = 1;
// return false;
// }
// wallet->filename = file_path;
// wallet->dbfile = fopen(file_path, "w+b");
// // file header magic, version and genesis lengths:
// size_t skip_length = 4 + sizeof(uint32_t) + sizeof(uint256);
// fseek(wallet->dbfile, skip_length, SEEK_CUR);
// while (!feof(wallet->dbfile))
// {
// uint8_t buf[sizeof(file_rec_magic)];
// if (fread(buf, sizeof(buf), 1, wallet->dbfile) != 1 ) {
// // no more record, break
// break;
// }
// if (memcmp(buf, file_rec_magic, sizeof(file_rec_magic))) {
// fprintf(stderr, "Wallet file: error reading record file (invalid magic). Wallet file is corrupt\n");
// return false;
// }
// uint32_t reclen = 0;
// if (!deser_varlen_from_file(&reclen, wallet->dbfile)) return false;
// uint8_t rectype;
// if (fread(&rectype, 1, 1, wallet->dbfile) != 1) return false;
// if (rectype == WALLET_DB_REC_TYPE_MASTERPUBKEY) {
// if (!dogecoin_load_wallet_masterpubkey(wallet)) return false;
// } else if (rectype == WALLET_DB_REC_TYPE_ADDR) {
// if (!dogecoin_wallet_load_address(wallet)) return false;
// } else if (rectype == WALLET_DB_REC_TYPE_TX) {
// if (!dogecoin_wallet_load_transaction(wallet, reclen)) return false;
// }
// }
// dogecoin_file_commit(wallet->dbfile);
// return true;
// }
dogecoin_bool dogecoin_wallet_load(dogecoin_wallet* wallet, const char* file_path, int *error, dogecoin_bool *created, dogecoin_bool prompt)
{
(void)(error);
if (!wallet) { return false; }
struct stat buffer;
*created = true;
if (stat(file_path, &buffer) == 0) {
*created = false; // Set created to false as file already exists
if (prompt) {
printf("Load %s? (Enter) or (o)verwrite:\n", file_path);
char response[MAX_LEN];
if (!fgets(response, MAX_LEN, stdin)) {
printf("Error reading input.\n");
return false;
}
if (response[0] == 'o' || response[0] == 'O') {
printf("Are you sure? (y/n): \n");
char confirm[MAX_LEN];
if (!fgets(confirm, MAX_LEN, stdin)) {
printf("Error reading input.\n");
return false;
}
if (confirm[0] == 'y' || confirm[0] == 'Y') {
remove(file_path); // remove the existing file
*created = true; // Set created to true as a new file will be created
}
}
}
}
wallet->dbfile = fopen(file_path, *created ? "a+b" : "r+b");
if (*created) {
if (!dogecoin_wallet_create(wallet, file_path, error)) {
return false;
}
}
else {
// check file-header-magic, version and genesis
uint8_t buf[sizeof(file_hdr_magic)+sizeof(current_version)+sizeof(uint256)];
if ((uint32_t)buffer.st_size < (uint32_t)(sizeof(buf)) || fread(buf, sizeof(buf), 1, wallet->dbfile) != 1 || memcmp(buf, file_hdr_magic, sizeof(file_hdr_magic)))
{
fprintf(stderr, "Wallet file: error reading database file\n");
return false;
}
if (le32toh(*(buf+sizeof(file_hdr_magic))) > current_version) {
fprintf(stderr, "Wallet file: unsupported file version\n");
return false;
}
if (memcmp(buf+sizeof(file_hdr_magic)+sizeof(current_version), wallet->chain->genesisblockhash, sizeof(uint256)) != 0) {
fprintf(stderr, "Wallet file: different network\n");
return false;
}
// read
while (!feof(wallet->dbfile))
{
uint8_t buf[sizeof(file_rec_magic)];
if (fread(buf, sizeof(buf), 1, wallet->dbfile) != 1 ) {
// no more record, break
break;
}
if (memcmp(buf, file_rec_magic, sizeof(file_rec_magic))) {
fprintf(stderr, "Wallet file: error reading record file (invalid magic). Wallet file is corrupt\n");
return false;
}
uint32_t reclen = 0;
if (!deser_varlen_from_file(&reclen, wallet->dbfile)) return false;
uint8_t rectype;
if (fread(&rectype, 1, 1, wallet->dbfile) != 1) return false;
if (rectype == WALLET_DB_REC_TYPE_MASTERPUBKEY) {
if (!dogecoin_load_wallet_masterpubkey(wallet)) return false;
} else if (rectype == WALLET_DB_REC_TYPE_ADDR) {
if (!dogecoin_wallet_load_address(wallet)) return false;
} else if (rectype == WALLET_DB_REC_TYPE_TX) {
if (!dogecoin_wallet_load_transaction(wallet, reclen)) return false;
} else {
fseek(wallet->dbfile, reclen, SEEK_CUR);
}
}
}
wallet->utxos = utxos;
return true;
}
dogecoin_bool dogecoin_wallet_flush(dogecoin_wallet* wallet)