cstring *wallet_new_address(struct wallet *wlt)
{
struct hd_path_seg hdpath[] = {
{ 44, true }, // BIP 44
{ 0, true }, // chain: BTC
{ 0, true }, // acct#
{ 0, false }, // change?
{ 0, false }, // key index
};
struct wallet_account *acct = account_byname(wlt, wlt->def_acct->str);
if (!acct)
return NULL;
// patch HD path based on account settings
hdpath[2].index = acct->acct_idx;
hdpath[4].index = acct->next_key_idx;
assert(wlt->hdmaster && (wlt->hdmaster->len > 0));
struct hd_extended_key *master = parr_idx(wlt->hdmaster, 0);
assert(master != NULL);
struct hd_extended_key child;
hd_extended_key_init(&child);
if (!hd_derive(&child, master, hdpath, ARRAY_SIZE(hdpath))) {
hd_extended_key_free(&child);
return NULL;
}
acct->next_key_idx++;
cstring *rs = bp_pubkey_get_address(&child.key,wlt->chain->addr_pubkey);
hd_extended_key_free(&child);
return rs;
}
int main(int argc, char* argv[])
{
int long_index = 0;
int opt = 0;
char* pkey = 0;
char* pubkey = 0;
char* cmd = 0;
char* keypath = 0;
const btc_chainparams* chain = &btc_chainparams_main;
/* get arguments */
while ((opt = getopt_long_only(argc, argv, "p:k:m:c:trv", long_options, &long_index)) != -1) {
switch (opt) {
case 'p':
pkey = optarg;
if (strlen(pkey) < 50)
return showError("Private key must be WIF encoded");
break;
case 'c':
cmd = optarg;
break;
case 'm':
keypath = optarg;
break;
case 'k':
pubkey = optarg;
break;
case 't':
chain = &btc_chainparams_test;
break;
case 'r':
chain = &btc_chainparams_regtest;
break;
case 'v':
print_version();
exit(EXIT_SUCCESS);
break;
default:
print_usage();
exit(EXIT_FAILURE);
}
}
if (!cmd) {
/* exit if no command was provided */
print_usage();
exit(EXIT_FAILURE);
}
/* start ECC context */
btc_ecc_start();
const char *pkey_error = "Missing extended key (use -p)";
if (strcmp(cmd, "pubfrompriv") == 0) {
/* output compressed hex pubkey from hex privkey */
size_t sizeout = 128;
char pubkey_hex[sizeout];
if (!pkey)
return showError(pkey_error);
if (!pubkey_from_privatekey(chain, pkey, pubkey_hex, &sizeout))
return showError("Operation failed");
/* clean memory of private key */
memset(pkey, 0, strlen(pkey));
/* give out hex pubkey */
printf("pubkey: %s\n", pubkey_hex);
/* give out p2pkh address */
char address[sizeout];
address_from_pubkey(chain, pubkey_hex, address);
printf("p2pkh address: %s\n", address);
/* clean memory */
memset(pubkey_hex, 0, strlen(pubkey_hex));
memset(address, 0, strlen(address));
} else if (strcmp(cmd, "addrfrompub") == 0 || strcmp(cmd, "p2pkhaddrfrompub") == 0) {
/* get p2pkh address from pubkey */
size_t sizeout = 128;
char address[sizeout];
if (!pubkey)
return showError("Missing public key (use -k)");
if (!address_from_pubkey(chain, pubkey, address))
return showError("Operation failed, invalid pubkey");
printf("p2pkh address: %s\n", address);
memset(pubkey, 0, strlen(pubkey));
memset(address, 0, strlen(address));
} else if (strcmp(cmd, "genkey") == 0) {
size_t sizeout = 128;
char newprivkey_wif[sizeout];
char newprivkey_hex[sizeout];
/* generate a new private key */
gen_privatekey(chain, newprivkey_wif, sizeout, newprivkey_hex);
printf("privatekey WIF: %s\n", newprivkey_wif);
printf("privatekey HEX: %s\n", newprivkey_hex);
memset(newprivkey_wif, 0, strlen(newprivkey_wif));
memset(newprivkey_hex, 0, strlen(newprivkey_hex));
} else if (strcmp(cmd, "hdgenmaster") == 0) {
size_t sizeout = 128;
char masterkey[sizeout];
/* generate a new hd master key */
hd_gen_master(chain, masterkey, sizeout);
printf("masterkey: %s\n", masterkey);
memset(masterkey, 0, strlen(masterkey));
} else if (strcmp(cmd, "hdprintkey") == 0) {
if (!pkey)
return showError(pkey_error);
if (!hd_print_node(chain, pkey))
return showError("Failed. Probably invalid extended key.\n");
} else if (strcmp(cmd, "hdderive") == 0) {
if (!pkey)
return showError(pkey_error);
if (!keypath)
return showError("Missing keypath (use -m)");
size_t sizeout = 128;
char newextkey[sizeout];
if (!hd_derive(chain, pkey, keypath, newextkey, sizeout))
return showError("Deriving child key failed\n");
else
hd_print_node(chain, newextkey);
}
btc_ecc_stop();
return 0;
}