61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
|
|
//#define KOMODO_ENABLE_INTEREST
|
|
|
|
#define KOMODO_INTEREST ((uint64_t)(0.05 * COIN))
|
|
#define dstr(x) ((double)(x)/COIN)
|
|
|
|
uint64_t komodo_accrued_interest(int32_t height,int64_t paidinterest)
|
|
{
|
|
static uint64_t *interests; static int32_t maxheight;
|
|
uint64_t total; int32_t ind,incr = 100000;
|
|
if ( height >= maxheight )
|
|
{
|
|
interests = (uint64_t *)realloc(interests,(maxheight + incr) * sizeof(*interests) * 2);
|
|
memset(&interests[maxheight << 1],0,incr * sizeof(*interests) * 2);
|
|
maxheight += incr;
|
|
}
|
|
ind = (height << 1);
|
|
if ( paidinterest < 0 ) // request
|
|
return(interests[ind]);
|
|
else
|
|
{
|
|
if ( interests[ind + 1] != paidinterest )
|
|
{
|
|
interests[ind + 1] = paidinterest;
|
|
if ( height == 0 )
|
|
interests[ind] = interests[ind + 1];
|
|
else interests[ind] = interests[ind - 2] + interests[ind + 1];
|
|
total = interests[ind];
|
|
for (++height; height<maxheight; height++)
|
|
{
|
|
ind = (height << 1);
|
|
interests[ind] = total;
|
|
interests[ind + 1] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
uint64_t komodo_moneysupply(int32_t height)
|
|
{
|
|
if ( height <= 1 )
|
|
return(0);
|
|
else return(COIN * 100000000 + (height-1) * 3 + komodo_accrued_interest(height,-1));
|
|
}
|
|
|
|
uint64_t komodo_interest(int32_t txheight,uint64_t nValue,uint32_t nLockTime,uint32_t tiptime)
|
|
{
|
|
int32_t minutes; uint64_t numerator,denominator,interest = 0;
|
|
if ( komodo_moneysupply(txheight) < MAX_MONEY && nLockTime >= LOCKTIME_THRESHOLD && tiptime != 0 && nLockTime < tiptime && nValue >= COIN )
|
|
{
|
|
minutes = (tiptime - nLockTime) / 60;
|
|
numerator = (nValue * KOMODO_INTEREST);
|
|
denominator = (((uint64_t)365 * 24 * 60) / minutes);
|
|
if ( denominator == 0 )
|
|
denominator = 1; // max KOMODO_INTEREST per transfer, do it at least annually!
|
|
interest = (numerator / denominator) / COIN;
|
|
fprintf(stderr,"komodo_interest %lld %.8f nLockTime.%u tiptime.%u minutes.%d interest %lld %.8f (%llu / %llu)\n",(long long)nValue,dstr(nValue),nLockTime,tiptime,minutes,(long long)interest,dstr(interest),(long long)numerator,(long long)denominator);
|
|
}
|
|
return(interest);
|
|
}
|