Too Long; Didn't Read
Many proposed blockchain solutions use verification games, whether informally as in TrueBit and Plasma, or formally as in <a href="https://alacris.io/" target="_blank">Alacris.io</a>. In these systems, an important challenge is for the contract to be able to assess whether participants are putting down sufficient collateral to accompany their claims; and this assessment crucially depends on having a good model for the price of gas.