AssertMinProtocolGasPrice returns an error if the provided gasPrices are lower then the required by protocol.

FeeAndPriority ensures tx has enough fee coins to pay for the gas at the CheckTx time to early remove transactions from the mempool without enough attached fee.

IsOracleOrGravityTx checks if all messages are oracle messages.

NewAnteHandler returns an AnteHandler that checks and increments sequence numbers, checks signatures & account numbers, and deducts fees from the first signer.

MaxMsgGasUsage defines the maximum gas allowed for an oracle transaction.

SpamPreventionDecorator defines a custom Umee AnteHandler decorator that is responsible for preventing oracle message spam.

OracleKeeper for feeder validation.