ExchangeRate
An exchange rate between hbar and cents (USD) and the time at which the exchange rate will expire, and be superseded by a new exchange rate.The price is computed as follow:
1 hbar = (centEquiv / hbarEquiv) USD cents
Hedera protobuf reference for the ExchangeRate message describing the HBAR to USD cents conversion rate and expiration used for fee calculations on Hedera.
1 hbar = (centEquiv / hbarEquiv) USD cents