Pull configuration values to ouroboros-network

[coot]

There are various default configuration values defined in different places. I suggest we provide:

Ouroboros.Network.Diffusion.Configuration

module in ouroboros-network which provides them. Some of the defaults are defined in

• cardano-node and include:
  • pncProtocolIdleTimeout
  • pncTimeWaitTimeout
  • pncAcceptedConnectionsLimit
  • pncTargetNumberOfRootPeers
  • pncTargetNumberOfKnownPeers
  • pncTargetNumberOfEstablishedPeers
  • pncTargetNumberOfActivePeers
  • pncTargetNumberOfKnownBigLedgerPeers
  • pncTargetNumberOfEstablishedBigLedgerPeers
  • pncTargetNumberOfActiveBigLedgerPeers
  • pncEnableP2P
  • pncPeerSharing

from ouroboros-network:

• Ouroboros.Network.NodeToNode.defaultMiniProtocolParameters which is used in miniProtocolParameters
• some values defined in Ouroboros.Network.Diffusion.Policies should be moved to the new module:
  • deactivateTimeout
  • closeConnectionTimeout
  • peerMetricsConfiguration

from ouroboros-consensus:

• defaultBlockFetchConfiguration
• stdChainSyncTimeout

[coot]

As of implementation it might be good idea to group all the outbound-governor related targets (e.g. pncTargetNumber...) group in a single record. For other we could provide newtype wrappers, especially if that turns out to be beneficial for ouroboros-network too - the advantage of this is that who ever is doing top level plumbing in cardano-node (or elsewhere, which currently doesn't exist 😁) will be assisted by the compiler.

[coot]

There's possibly one more config value which goes into the outbound-governor default configuration: the default number of bootstrap peers.

[coot]

Peer sharing configuration values than could be moved too, ref (it's a link to a PR currently in review).

[crocodile-dentist]

will do