/* Copyright (c) 2017 Pieter Wuille
 *
 * 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.
 */

#ifndef _BSTRING_BECH32_H
#define _BSTRING_BECH32_H 1

#include <stdint.h>

bool
bstring_bech32_serialize(
  char *output,
  const char *hrp,
  const uint8_t *data,
  size_t data_len
);

bool
bstring_bech32_deserialize(
  char *hrp,
  uint8_t *data,
  size_t *data_len,
  const char *input
);

bool
bstring_bech32_is(const char *str);

bool
bstring_bech32_convert_bits(
  uint8_t *out,
  size_t *outlen,
  int outbits,
  const uint8_t *in,
  size_t inlen,
  int inbits,
  int pad
);

/** Encode a SegWit address
 *
 *  Out: output:   Pointer to a buffer of size 73 + strlen(hrp) that will be
 *                 updated to contain the null-terminated address.
 *  In:  hrp:      Pointer to the null-terminated human readable part to use
 *                 (chain/network specific).
 *       ver:      Version of the witness program (between 0 and 16 inclusive).
 *       prog:     Data bytes for the witness program (between 2 and 40 bytes).
 *       prog_len: Number of data bytes in prog.
 *  Returns true if successful.
 */
bool
bstring_bech32_encode(
  char *output,
  const char *hrp,
  int ver,
  const uint8_t *prog,
  size_t prog_len
);

/** Decode a SegWit address
 *
 *  Out: ver:      Pointer to an int that will be updated to contain the witness
 *                 program version (between 0 and 16 inclusive).
 *       prog:     Pointer to a buffer of size 40 that will be updated to
 *                 contain the witness program bytes.
 *       prog_len: Pointer to a size_t that will be updated to contain the length
 *                 of bytes in prog.
 *       hrp:      Pointer to the null-terminated human readable part that will
 *                 be updated to contain the string.
 *       addr:     Pointer to the null-terminated address.
 *  Returns true if successful.
 */
bool
bstring_bech32_decode(
  int *ver,
  uint8_t *prog,
  size_t *prog_len,
  char *hrp,
  const char *addr
);

bool
bstring_bech32_test(const char *addr);

#endif