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16_7_genhd_for_import.c
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16_7_genhd_for_import.c
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#include <stdio.h>
#include "sodium.h"
#include "wally_core.h"
#include "wally_bip39.h"
#include "wally_bip32.h"
#include "wally_address.h"
#include <jansson.h>
int main(void) {
int lw_response;
/* 1. Initialize Libwally */
lw_response = wally_init(0);
if (lw_response) {
printf("Error: Wally_init failed: %d\n",lw_response);
exit(-1);
}
/* 2. Generate Entropy + Mnemonic + Seed */
unsigned char entropy[16];
randombytes_buf(entropy, 16);
char *mnem = NULL;
lw_response = bip39_mnemonic_from_bytes(NULL,entropy,16,&mnem);
if (lw_response) {
printf("Error: bip39_mnemonic_from_bytes failed: %d\n",lw_response);
exit(-1);
}
unsigned char seed[BIP39_SEED_LEN_512];
size_t seed_len;
lw_response = bip39_mnemonic_to_seed(mnem,NULL,seed,BIP39_SEED_LEN_512,&seed_len);
if (lw_response) {
printf("Error: bip39_mnemonic_to_seed failed: %d\n",lw_response);
exit(-1);
}
/* 3. Generate root */
struct ext_key *key_root;
lw_response = bip32_key_from_seed_alloc(seed,sizeof(seed),BIP32_VER_TEST_PRIVATE,0,&key_root);
if (lw_response) {
printf("Error: bip32_key_from_seed failed: %d\n",lw_response);
exit(-1);
}
/* 4. Generate key for account */
struct ext_key *key_account;
uint32_t path_account[] = {BIP32_INITIAL_HARDENED_CHILD+84, BIP32_INITIAL_HARDENED_CHILD+1, BIP32_INITIAL_HARDENED_CHILD};
lw_response = bip32_key_from_parent_path_alloc(key_root,path_account,sizeof(path_account),BIP32_FLAG_KEY_PRIVATE,&key_account);
if (lw_response) {
printf("Error: bip32_key_from_parent_path_alloc failed: %d\n",lw_response);
exit(-1);
}
char *a_xprv;
lw_response = bip32_key_to_base58(key_account, BIP32_FLAG_KEY_PRIVATE, &a_xprv);
if (lw_response) {
printf("Error: account bip32_key_to_base58 failed: %d\n",lw_response);
exit(-1);
}
/* 5. Generate External Adress Key + Sample Address*/
struct ext_key *key_external;
lw_response = bip32_key_from_parent_alloc(key_account,0,BIP32_FLAG_KEY_PRIVATE,&key_external);
if (lw_response) {
printf("Error: root bip32_key_from_parent_alloc Level #1 failed: %d\n",lw_response);
exit(-1);
}
struct ext_key *key_address;
lw_response = bip32_key_from_parent_alloc(key_external,0,BIP32_FLAG_KEY_PRIVATE,&key_address);
if (lw_response) {
printf("Error: root bip32_key_from_parent_alloc Level #2 failed: %d\n",lw_response);
exit(-1);
}
char *segwit;
lw_response = wally_bip32_key_to_addr_segwit(key_address,"tb",0,&segwit);
/* 6. Generate a Fingerprint */
char account_fingerprint[BIP32_KEY_FINGERPRINT_LEN];
lw_response = bip32_key_get_fingerprint(key_account,account_fingerprint,BIP32_KEY_FINGERPRINT_LEN);
if (lw_response) {
printf("Error: root bip32_key_get_fingerprint failed: %d\n",lw_response);
exit(-1);
}
char *fp_hex;
lw_response = wally_hex_from_bytes(account_fingerprint,BIP32_KEY_FINGERPRINT_LEN,&fp_hex);
/* 7. Output in JSON */
json_t *outputparams = NULL;
outputparams = json_object();
json_object_set(outputparams, "mnemonic", json_string(mnem));
json_object_set(outputparams, "account-xprv", json_string(a_xprv));
json_object_set(outputparams, "address", json_string(segwit));
char derivation[BIP32_KEY_FINGERPRINT_LEN+3+sizeof("84h/1h/0h")];
sprintf(derivation,"[%s/%s]",fp_hex,"84h/1h/0h");
json_object_set(outputparams, "derivation", json_string(derivation));
printf ("%s\n", json_dumps(outputparams, JSON_INDENT(2)));
/* Cleanup! */
json_decref(outputparams);
bip32_key_free(key_address);
bip32_key_free(key_external);
bip32_key_free(key_account);
bip32_key_free(key_root);
wally_free_string(a_xprv);
wally_free_string(fp_hex);
wally_free_string(mnem);
wally_cleanup(0);
}