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Randomize sietch memos and increase min zouts to 3

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This commit is contained in:
Duke Leto
2020-06-13 21:34:20 -04:00
parent 717533f711
commit a053d212b8
1 changed files with 15 additions and 5 deletions
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20
src/wallet/rpcwallet.cpp
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@@ -4590,6 +4590,15 @@ UniValue z_getoperationstatus_IMPL(const UniValue& params, bool fRemoveFinishedO
#define CTXIN_SPEND_DUST_SIZE 148
#define CTXOUT_REGULAR_SIZE 34
void random_hex(char str[], int len)
{
char hex[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
for(int i=0;i<len;i++) {
str[i] = hex[GetRandInt(16)];
}
str[len]=0;
}
UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
{
if (!EnsureWalletIsAvailable(fHelp))
@@ -4725,13 +4734,13 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
// SIETCH: Sprinkle our cave with some magic privacy zdust
// End goal is to have this be as large as possible without slowing xtns down too much
// A value of 7 will provide much stronger linkability privacy versus pre-Sietch operations
unsigned int DEFAULT_MIN_ZOUTS=7;
unsigned int ABSOLUTE_MIN_ZOUTS=3;
unsigned int MAX_ZOUTS=25;
unsigned int MIN_ZOUTS=GetArg("--sietch-min-zouts", DEFAULT_MIN_ZOUTS);
if((MIN_ZOUTS<2) || (MIN_ZOUTS>MAX_ZOUTS)) {
fprintf(stderr,"%s: Sietch min zouts must be >=2 and <= 25, setting to default value of %d\n", __FUNCTION__, DEFAULT_MIN_ZOUTS );
if((MIN_ZOUTS<ABSOLUTE_MIN_ZOUTS) || (MIN_ZOUTS>MAX_ZOUTS)) {
fprintf(stderr,"%s: Sietch min zouts must be >=%d and <= %d, setting to default value of %d\n", __FUNCTION__, ABSOLUTE_MIN_ZOUTS, MAX_ZOUTS, DEFAULT_MIN_ZOUTS );
MIN_ZOUTS=DEFAULT_MIN_ZOUTS;
}
@@ -4739,8 +4748,9 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
// OK, we identify this xtn as needing privacy zdust, we must decide how much, non-deterministically
int nAmount = 0;
int decider = 1 + GetRandInt(100); // random int between 1 and 100
string memo = "f600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000";
char *str;
random_hex(str,512);
string memo = string(str);
string zdust1, zdust2;
// Which zaddr we send to is non-deterministically chosen from two zpools...