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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 0.17
TRX 0.15
JST 0.029
BTC 62017.93
ETH 2409.75
USDT 1.00
SBD 2.65