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Create 16_5_replacewithscript.c

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Shannon Appelcline 2020-08-12 14:48:32 -10:00 committed by GitHub
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commit 1b9a4467eb
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#include <stdio.h>
#include <assert.h>
#include "wally_core.h"
#include "wally_transaction.h"
#include "wally_script.h"
int main(int argc, char *argv[]) {
if (argc != 3) {
printf("ERROR: Only %i arguments! Correct usage is '%s [transaction hex] [serialized locking script]'\n",argc-1,argv[0]);
exit(-1);
}
char *utxo_hex = argv[1];
char *script = argv[2];
int lw_response;
size_t written;
/* 1. Create the P2SH Script */
unsigned char bscript[4];
lw_response = wally_hex_to_bytes(script,bscript,4,&written);
assert(lw_response == WALLY_OK);
unsigned char p2sh[WALLY_SCRIPTPUBKEY_P2SH_LEN];
lw_response = wally_scriptpubkey_p2sh_from_bytes(bscript,sizeof(bscript),WALLY_SCRIPT_HASH160,p2sh,WALLY_SCRIPTPUBKEY_P2SH_LEN,&written);
assert(lw_response == WALLY_OK);
char *pubkey;
lw_response = wally_hex_from_bytes(p2sh,sizeof(p2sh),&pubkey);
/* 2. Create the Transaction */
struct wally_tx *tx;
lw_response = wally_tx_init_alloc(2,0,1,1,&tx);
assert(lw_response == WALLY_OK);
/* 3. Create the Outputs with the P2SH */
struct wally_tx_output *tx_output;
lw_response = wally_tx_output_init_alloc(95000,p2sh,sizeof(p2sh),&tx_output);
assert(lw_response == WALLY_OK);
lw_response = wally_tx_add_output(tx,tx_output);
assert(lw_response == WALLY_OK);
/* 4. Create the Inputs based on Hex */
struct wally_tx *utxo;
lw_response = wally_tx_from_hex(utxo_hex,0,&utxo);
assert(lw_response == WALLY_OK);
struct wally_tx_input *tx_input;
lw_response = wally_tx_input_init_alloc(utxo->inputs[0].txhash,sizeof(utxo->inputs[0].txhash),utxo->inputs[0].index,0,utxo->inputs[0].script,utxo->inputs[0].script_len,utxo->inputs[0].witness,&tx_input);
assert(lw_response == WALLY_OK);
lw_response = wally_tx_add_input(tx,tx_input);
assert(lw_response == WALLY_OK);
/* 5. Print It */
char *tx_hex;
lw_response = wally_tx_to_hex(tx,0, &tx_hex);
assert(lw_response == WALLY_OK);
printf("%s\n",tx_hex);
wally_free_string(tx_hex);
wally_tx_free(tx);
wally_tx_input_free(tx_input);
wally_tx_output_free(tx_output);
wally_cleanup(0);
}