Question: providerStates allowed in any contract?

[scraymondjr]

The spec README seems to indicate that providerState will be updated to providerStates for all contracts here, but it seems that language implementations are only updating the field for Message contracts (example commit).

Should providerStates be available for Interaction and Message contracts or is it correct that provider states with multiple states with params is only supported for Message types?

[uglyog]

providerState is used in older versions (V1, V2) of the pact files. Versions V3+ it is the plural form.

Message pacts only exist with V3 (V1 and V2 are HTTP only), so should always use the plural with multiple values. However, if the spec version is set to V2 for HTTP pacts, it must use the single form.