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[WIP] Enable validators to find and connect to other validators #3247

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[WIP] Enable validators to find and connect to other validators #3247

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Commits on Jul 30, 2019

  1. core/{service,network}: Put AuthorityId -> MultiAddr on Dht

    @mxinden
    mxinden committed Jul 30, 2019
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  2. core/service: Add trait abst to build_network_future to call runtime 

    Instead of building the network future via an independent function
`build_network_future`, follow the convention introduced through
`components.rs/OffchainWorker` and have `build_network_future` implement
a trait.
    @mxinden
    mxinden committed Jul 30, 2019
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  3. core/session: Declare + implement runtime SessionApi 

    The runtime SessionApi enables users to retrieve the ids of the current
set of validators from the srml session module.
    @mxinden
    mxinden committed Jul 30, 2019
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  4. core/service: Use AuthorityKeyProvider 

    For a node to be able to learn its own authority id (public key) and to
be able to sign payloads for the DHT, the node needs to retrieve its
authority key. This is done via AuthorityKeyProvider.
    @mxinden
    mxinden committed Jul 30, 2019
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  5. Cleanup

    @mxinden
    mxinden committed Jul 30, 2019
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  6. core/service: Match received external addresses with their public key

    @mxinden
    mxinden committed Jul 30, 2019
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  7. core/service: Advice peerset to connect to discovered nodes

    @mxinden
    mxinden committed Jul 30, 2019
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  8. core/consensus,node/runtime: Declare and implement authorities endpoint 

    The goal of the commit is to be able to retrieve the current set of
authorities without needing to know the concrete consensus mechanism in
place.

In order to achieve the above this commit introduces the
`core/consensus/common/primitives` crate, declaring the `ConsensusApi`
runtime API. In addition it implements the above mentioned trait
definition in `node/runtime` by returning the current authorities of the
BABE consensus mechanism.
    @mxinden
    mxinden committed Jul 30, 2019
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  9. core/service: Use common consensus authorities api

    @mxinden
    mxinden committed Jul 30, 2019
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  10. core/service: Verify signature before adding node 

    When retrieving addresses of other validators via the DHT, make sure
they are within the current validator set and the payload is properly
signed with the authority key.
    @mxinden
    mxinden committed Jul 30, 2019
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  11. core/service: Refactor build_network_future

    @mxinden
    mxinden committed Jul 30, 2019
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