added a caip24 proposal for cosmos caip19 asset namespace to make cos…

…mos asset references unique

.gitignore

@@ -0,0 +1 @@
+.history/

CAIPs/caip-24.md

@@ -0,0 +1,70 @@
+---
+caip: 24
+title: Asset Reference for the cosmos Asset Namespace
+author: Theobold Frazier
+discussions-to: https://github.com/shapeshift/CAIPs/issues/1
+status: Draft
+type: Standard
+created: 2020-02-14
+updated: 2020-02-14
+requires: 19
+---
+
+## Simple Summary
+
+This document is about the details of the Cosmos network asset namespace and reference for CAIP-19.
+
+## Abstract
+
+In CAIP-19 a general asset identification scheme is defined. This is the
+implementation of CAIP-19 for Cosmos chain native assets and ibc assets.
+
+## Motivation
+
+See CAIP-19.
+
+## Specification
+
+### Cosmos chain Native Asset Namespace
+
+An asset namespace called "native" that references cosmos network blockchain native
+assets, allowing for unique identification on cosmos chains with multiple native assets.
+
+### Cosmos chain ibc asset Asset Namespace
+
+The asset namespace is called "ibc". It reference cosmos network blockchain inter blockchain channel assets.
+
+#### Asset Reference Definition
+
+The Asset Reference format for cosmos chains is the the base denom of the asset in the current chain_id.
+
+## Rationale
+
+The asset namespace using slip44 for cosmos chains is insufficient for chains with multiple native assets
+like osmosis-1. Using the "native" namespace allows multiple native assets to have unique CAIP19s.
+
+## Backwards Compatibility
+
+Not applicable
+
+## Test Cases
+
+This is a list of manually composed examples
+
+```
+# Native Atom Asset ont the cosmoshub-4 chain
+cosmos:cosmoshub-4/slip44:118
+
+# Native Osmosis Asset on the osmosis-1 chain
+cosmos:osmosis-1/slip44:118
+
+# Native Ion Asset on the osmosis-1 chain
+cosmos:osmosis-1/native:uion
+
+# IBC Atom asset on the osmosis-1 chain
+cosmos:osmosis-1/ibc:27394FB092D2ECCD56123C74F36E4C1F926001CEADA9CA97EA622B25F41E5EB2
+```
+
+## Copyright
+
+Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).