feat: merge CAIP69 into CAIP10 for specifying EOA wallets (#107)

Author: bumblefudge

eip155/caip10.md

@@ -21,13 +21,33 @@ While Ethereum "accounts" were the unstated norm in the definition of
 [CAIP-10][], there are still some particularities of the syntax that should be
 specified for the unfamiliar.  
 
+### Special case of EOA
+
+To express Ethereum account without reference to any specific [EIP-155][] chain ID, CAIP-10 identifiers can use the special `chainId` segment `0`.
+
+In the Ethereum account system, "externally owned accounts" (i.e. "offchain" wallets) are controlled by user agents and not by on-chain entities (i.e. deployed or deployable smart contract code). 
+The special chainId `0` SHOULD only be used for accounts that can be used in off-chain contexts, i.e. without the use of an Ethereum node.
+
+Note that a given address cannot be assumed to work on all current and future networks with an [EIP-155][] `chainId`, which may express or derive addresses differently for a given private key; a user account expressed with `chainId` segment of 0 is assumed to control the same account on `chainId` 1 and most ethereum chains, but MAY control a different account or additional accounts on networks that extend the account or addressing model of Ethereum, assume different key or hash derivations, etc.
+
 ## Syntax
 
 Ethereum addresses were, historically, case-insensitive and normalized to use
 all-lowercase letters (`abcdef`) like most hexadecimal numeric types.  With the
-ratification of [EIP55][], however, a particular normalization of lowercase- and
+ratification of [EIP-55][], however, a particular normalization of lowercase- and
 uppercase- `abcdefABCDEF` characters was invented as an efficient form of
-checksum. See [EIP55][] for specification.
+checksum. See [EIP-55][] for specification.
+
+The chain ID will be used to represent blockchain except special case of 0 as chainID to represent EOA.
+
+The `chain_id` string will be ammended as follows:
+
+```
+chain_id:    namespace + ":" + network_id + ":" + reference
+network_id:    [0-9]{1,19}
+namespace:   [-a-z0-9]{3,8}
+reference:   0x[a-fA-F0-9]{1,32}
+```
 
 ### Backwards Compatibility
 
@@ -42,6 +62,9 @@ accounts in this manner.
 ## Test Cases
 
 ```
+# EOA
+eip155:0:0x839395e20bbB182fa440d08F850E6c7A8f6F0780
+
 # Ethereum mainnet (valid/checksummed)
 eip155:1:0x22227A31dd842196A246d8f3b775998560eAa61d
 
@@ -56,24 +79,31 @@ eip155:137:0x0495766CD136138FC492DD499B8DC87A92D6685B
 
 ```
 
+## Security Considerations
+
+As the Ethereum namespace evolved, user-agents that connect to dapps through an [EIP-1193][] interface started to accrue "off-chain" use-cases such as authenticating control of an onchain account with an "off-chain" signature (i.e. a transaction signed by the wallet and verified by a dapp or website without either party submitting it to a node or running any on-chain functions). It is RECOMMENDED that wallets using the chainId of `0` be authenticated in a standardized and secure manner which produces verifiable receipts of the authenticaiton event, such as that documented in [ERC-4361][] and extended by [CAIP-122][].
+
 ## References
 
-- [EIP155][]: Ethereum Improvement Proposal specifying generation and validation of ChainIDs
+- [EIP-155][]: Ethereum Improvement Proposal specifying generation and validation of ChainIDs
 - [ethereum-lists/chains][]: An open registry for eip155 network operators to claim a
       unique chainID and self-publish RPC/node information for them.
-- [ERC20][]: Basic [aka Fungible] Token Standard
-- [ERC721][]: Non-Fungible Token Standard
+- [ERC-20][]: Basic [aka Fungible] Token Standard
+- [ERC-721][]: Non-Fungible Token Standard
 
 [Chainid.network]: https://github.com/ethereum-lists/chains
 [CAIP-2]: https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-2.md
 [CAIP-10]: https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-10.md
 [CAIP-19]: https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-19.md
 [CAIP-21]: https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-21.md
 [CAIP-22]: https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-22.md
-[EIP155]: https://eips.ethereum.org/EIPS/eip-155
-[EIP55]: https://eips.ethereum.org/EIPS/eip-55
-[ERC20]: https://eips.ethereum.org/EIPS/eip-20
-[ERC721]: https://eips.ethereum.org/EIPS/eip-721
+[CAIP-122]: https://chainagnostic.org/CAIPs/caip-122
+[ERC-4361]: https://eips.ethereum.org/EIPS/eip-4361
+[EIP-1193]: https://eips.ethereum.org/EIPS/eip-1193
+[EIP-155]: https://eips.ethereum.org/EIPS/eip-155
+[EIP-55]: https://eips.ethereum.org/EIPS/eip-55
+[ERC-20]: https://eips.ethereum.org/EIPS/eip-20
+[ERC-721]: https://eips.ethereum.org/EIPS/eip-721
 
 
 ## Rights