Merge pull request ethereum#83 from Concordium/add-ccd

Add namespace for Concordium (ccd)

ccd/README.md

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+---
+namespace-identifier: ccd
+title: Concordium
+author: "Concordium development team <developers@concordium.com>"
+status: Draft
+type: Informational
+created: 2023-04-01
+requires: ["CAIP-2"]
+---
+
+# Namespace for Concordium Blockchains
+
+This document defines the applicability of CAIP schemes to the networks of the Concordium blockchain ecosystem.
+
+# Syntax
+
+The `ccd` namespace refers to networks and other objects within the Concordium blockchain ecosystem.
+
+## References
+
+- [Concordium Developer Documentation][]
+- [Concordium gRPC][] - Interacting with a Concordium node: Description of the Concordium gRPC API.
+- [Concordium CAIP-2][] - Concordium network identifiers.
+
+[Concordium Developer Documentation]: https://developer.concordium.software/en/mainnet/index.html
+[Concordium gRPC]: http://developer.concordium.software/concordium-grpc-api/
+[Concordium CAIP-2]: caip2
+
+## Copyright
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).

ccd/caip2.md

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+---
+namespace-identifier: ccd-caip2
+title: Concordium - Networks
+author: "Concordium development team <developers@concordium.com>"
+discussions-to: https://github.com/ChainAgnostic/namespaces/pull/83
+status: Draft
+type: Standard
+created: 2023-04-01
+---
+
+<!--You can leave these HTML comments in your merged EIP and delete the 
+ visible duplicate text guides, they will not appear and may be helpful to 
+ refer to if you edit it again. This is the suggested template for new EIPs.
+ Note that an EIP number will be assigned by an editor. When opening a pull
+ request to submit your EIP, please use an abbreviated title in the 
+ filename, `caipX.md`, all lowercase, no `-` between the CAIP and its 
+ number.-->
+
+# CAIP-2
+
+*For context, see the [CAIP-2][] specification.*
+
+<!-- Provide a simplified and layman-accessible explanation of the CAIP.-->
+
+This CAIP defines an identification schema for Concordium networks.
+The Concordium networks are identified by the `ccd` namespace prefix, followed by a truncated hash of the given network's genesis block.
+
+## Rationale
+<!--A short (~200 word) description of the technical issue being addressed.-->
+Concordium has one mainnet and potentially several testnets.
+These networks are uniquely identified by a hash of their genesis blocks.
+
+## Syntax
+
+<!-- Explain the actual algorithm or transformation needed to transform inputs into a
+conformant and unique CAIP deterministically.  Consider including a regular
+expression for validation as well, as some consumers or toolmakers may want to
+support this CAIP without a deep understanding of any specifications, devdocs,
+or improvement proposals on which this specification depends. -->
+
+Concordium's network ID is a hash of its genesis block in hexadecimal encoding, truncated to the first 32 characters.
+
+<!-- TODO: add some details, e.g. something like pseudocode `truncate(SHA512(block_data), 32)` -->
+
+### Resolution Mechanics
+
+A hash of the genesis block can be obtained using the gRPC interface of a Concordium node (see [Concordium gRPC][]).
+The [GetConsensusInfo][] command provides data which includes the hash of that network's genesis block, which can be truncated to serve as the network identifier.
+
+The request using a CLI tool [concordium-client][] looks as follows:
+
+```
+concordium-client raw GetConsensusInfo
+```
+
+Example response for the `testnet` node:
+
+```json
+{
+    "bestBlock": "fa03132dbd8e5d0a2871c47a50bfbd532f3ef4c598098e64eed5a07a169f2574",
+    "bestBlockHeight": 3541516,
+    "blockArriveLatencyEMA": 0.1463579781506756,
+    "blockArriveLatencyEMSD": 5.644804435079067e-2,
+    "blockArrivePeriodEMA": 10.773324091402692,
+    "blockArrivePeriodEMSD": 10.96881296245654,
+    "blockLastArrivedTime": "2023-08-07T16:05:09.799512996Z",
+    "blockLastReceivedTime": "2023-08-07T16:05:09.791343727Z",
+    "blockReceiveLatencyEMA": 0.13744546306746866,
+    "blockReceiveLatencyEMSD": 5.6358647255823326e-2,
+    "blockReceivePeriodEMA": 10.773406674300828,
+    "blockReceivePeriodEMSD": 10.96849563757842,
+    "blocksReceivedCount": 229906,
+    "blocksVerifiedCount": 229906,
+    "currentEraGenesisBlock": "7687b54a59fa29d40c69278a01ddd33a40a8fdd6775a3a01343b3576205db1e1",
+    "currentEraGenesisTime": "2022-11-22T11:05:19.5Z",
+    "epochDuration": 3600000,
+    "finalizationCount": 206332,
+    "finalizationPeriodEMA": 11.586703983078877,
+    "finalizationPeriodEMSD": 11.25944943176555,
+    "genesisBlock": "4221332d34e1694168c2a0c0b3fd0f273809612cb13d000d5c2e00e85f50f796",
+    "genesisIndex": 2,
+    "genesisTime": "2022-06-13T10:00:00Z",
+    "lastFinalizedBlock": "fa03132dbd8e5d0a2871c47a50bfbd532f3ef4c598098e64eed5a07a169f2574",
+    "lastFinalizedBlockHeight": 3541516,
+    "lastFinalizedTime": "2023-08-07T16:05:10.728847984Z",
+    "protocolVersion": 5,
+    "slotDuration": 250,
+    "transactionsPerBlockEMA": 2.739314019392612e-2,
+    "transactionsPerBlockEMSD": 0.16322608879784517
+}
+```
+
+Truncating the value of the `genesisBlock` attribute to the first 32 characters gives `4221332d34e1694168c2a0c0b3fd0f27`
+
+<!-- Many blockchain systems allow for transactions, asset-states, etc. to be
+validated against the chain they are targeting or depending to to avoid replay
+attacks or other unintended outcomes. This is often done by an API or RPC call
+to a node to validate the targetted chain or network. Include a sample
+request/response and add the relevant documentation to the `## References`
+section below if possible, as well as an explanation of any steps needed to
+validate the results, calculate checksums, etc. -->
+
+### Backwards Compatibility
+
+Not applicable
+
+## Test Cases
+
+This is a list of manually composed examples:
+
+```
+# Concordium mainnet
+ccd:9dd9ca4d19e9393877d2c44b70f89acb
+
+# Current Concordium testnet
+ccd:4221332d34e1694168c2a0c0b3fd0f27
+```
+
+## References
+
+- [Concordium Developer Documentation][]
+- [Concordium gRPC][] - Interacting with a Concordium node: Description of the Concordium gRPC API.
+
+[Concordium Developer Documentation]: https://developer.concordium.software/en/mainnet/index.html
+[Concordium gRPC]: http://developer.concordium.software/concordium-grpc-api/
+[concordium-client]: https://developer.concordium.software/en/mainnet/net/references/concordium-client.html
+[GetConsensusInfo]:https://developer.concordium.software/concordium-grpc-api/#concordium.v2.ConsensusInfo
+
+[CAIP-2]: ccd/caip2
+
+## Copyright
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).