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In real time?

"What's the cost?"
"X.033"
Roll
"Damn, it's now worth X.032" <-- this actually happens with crypto.

Or someone could wind up with 2 for one deal.

What would be the mechanic for that?

Coin Marketplace

STEEM 0.16
TRX 0.16
JST 0.032
BTC 59241.40
ETH 2525.12
USDT 1.00
SBD 2.47