How to get GasPrices?

[0xZonh]

Normally, we use gasPrices of 0.025uatom to initiate transactions, but I want to pay as little as possible. I know that the node has a limit of min-gas-prices, so how do we know the min-gas-prices of the node, or how do we estimate the minimum transaction fee?

[alexanderbez]

https://github.com/cosmos/cosmos-sdk/blob/main/proto/cosmos/base/node/v1beta1/query.proto#L13-L15