NewProcessor creates a new Processor.

ValidateMerkleRootsState validates the proposed merkle roots against the current on-chain state.

Processor is the processor responsible for reading next messages and building merkle roots for them, It's setup to use RMN to query which messages to include in the merkle root and ensures the newly built merkle roots are the same as RMN roots.

MetricsReporter exposes only relevant methods for reporting merkle roots from metrics.Reporter.

Observer is an interface for observing data from the offRamp, onRamp, RMN remote config, etc...