Make MercuryProvider extend PluginProvider #165
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We want to replace the
New<Product>Provider
methods in the relayer interface with a single, polymorphicNewPluginProvider
method which extends a common PluginProvider interface exposing the three OCR components required to set up an Oracle.At the moment the MedianProvider and FunctionsProvider both extend this interface, but Mercury does not since it extends the OCR ContractTransmitter with a few additional methods.
This modifies Mercury's interface by splitting this transmitter into two separate components, once which implements
ocrtypes.ContractTransmitter
and another which encompasses the additional methods (and implementsmercury.MercuryServerFetcher
). This is a largely cosmetic change, since under the hood the transmitter can remain the same struct, just exposed in two different methods.