Create #95-les-service-model (#138)

* Create draft for PR for idea 95

* Move into regular file until general decision

* Add LES details

* Describe negotiation better

* Reorganization of idea and artifacts

* More detailed MVP and success metrics

ideas/095-les-service-model/README.md

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+## Preamble
+
+    Idea: #095-les-service-model
+    Title: Introduce LES Service Model
+    Status: Draft
+    Created: 2018-03-20
+
+## Summary
+
+Introduce the LES Service Model where LES clients can subscribe to higher quality services. Different
+payment models will be available, negotiation between client and full node is done via auctions based
+on demands and capacity.
+
+This way full node service provide are able to monetize the services they provide. LES will make the
+beginning, Whisper and Swarm may follow.
+
+## Swarm Participants
+
+- Lead Contributor: @themue
+- Testing & Evaluation:
+- Contributor: @jeka
+- Contributor: @b00ris
+- PM: @zsfelfoldi (external)
+- UX (if relevant):
+
+## Product Overview
+
+Today all light clients are treated equal by the full nodes they connect. A future service model will introduce
+the separation between free and payed services. As outlined by Felföldi Zsolt:
+
+- LES will be available either as free or paid service,
+- paid service can guarantee availability and short response times,
+- client bandwidth demand fluctuates with time, good service quality requires reserve capacity,
+- for-profit LES servers can still give away their extra capacity for free (with lower priority than paid service),
+- free service is a good indicator of high bandwidth capacity and therefore the capability to provide good service, and
+- paying clients will prefer servers which already gave them free service so free service can act as an advertisement.
+
+Once the service model is introduced changes to Status app are needed:
+
+- Migration from Infura to ULC
+- Choice between free and paid LES service
+- In case of paid LES service definition of demands for auction
+
+### Remark
+
+For Status it also could become interesting to become a service provider offering payed full node services not only
+for own clients. This business case should be evaluated in an own swarm.
+
+### Product Description
+
+Parts of the introduction of the LES Service Model are:
+
+- research, definition, and implementation of connection management system of paying clients for full nodes,
+- research, definition, and implementation of auctioning,
+- research, definition, and implementation of payment methods and models,
+- documentation.
+
+### Minimum Viable Product
+
+Goal Date: TBD (before end of Q2/2018)
+
+Description:
+
+- [ ] New Ultra Light Client Mode is added to LES
+- [ ] Auctioning protocol between client and full node is defined
+- [ ] Payment methods and models are defined
+- [ ] Initial implementation validates auctioning and micropayment in automated tests
+
+## Artifacts
+
+- [Logfile](log.md)
+- [Links](links.md)
+
+## Success Metrics
+
+LES of `go-ethereum` is extended to provide a micropayed services with a higher quality
+level as well as free services depending on capacity and configuration.
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).
+

ideas/095-les-service-model/links.md

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+## Links
+
+- [LES Service Model by Felföldi Zsolt](https://github.com/zsfelfoldi/ethereum-docs/blob/master/les/service_model.md)
+

ideas/095-les-service-model/log.md

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+## Logfile
+
+### 2018-04-06
+
+- (C) Moved single idea file into swarm directory
+- (A) Added logfile