CheckFromAddressesExist returns an error if and only if one of the addresses in the BlockHeaderFeeder spec's fromAddresses field does not exist in the keystore.

NewBlockHeaderFeeder creates a new BlockHeaderFeeder instance.

ValidatedSpec validates and converts the given toml string to a job.Job.

BlockHeaderFeeder checks recent VRF coordinator events and stores any blockhashes for blocks within waitBlocks and lookbackBlocks that have unfulfilled requests.

BatchBHS defines an interface for interacting with a BatchBlockhashStore contract.