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bip122/README.md

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+---
+namespace-identifier: bip122
+title: BIP122 Namespace
+author: Simon Warta (@webmaster128), ligi <ligi@ligi.de>, Pedro Gomes (@pedrouid)
+status: Draft
+type: Informational
+created: 2019-12-05
+updated: 2022-03-27
+replaces: CAIP-4
+---
+
+# Namespace for BIP122 chains
+
+This document describes the syntax and structure of the [BIP122][] namespace,
+which formalized a URI scheme for references on Bitcoin-based networks that
+conform to the convention, abstracting out specifics of block explorer
+interfaces. 
+
+## Context
+
+[BIP122][] is a draft specification from the Bitcoin improvement process from
+2015 which has achieved wide adoption. It defines a `blockchain://` URI scheme,
+although it has not, to date, been registered with IANA. Note: an IANA
+registration has been
+[proposed](https://www.iana.org/assignments/uri-schemes/prov/bitcoin) for
+`bitcoin://` URIs, based on the older, and less chain-agnostic [BIP21][].
+
+## References
+
+- [BIP13][]: Bitcoin Improvement Proposal specifying "Script Hash" addresses
+- [BIP21][]: Bitcoin Improvement Proposal specifying `bitcoin` URI scheme
+- [BIP122][]: Bitcoin Improvement Proposal specifying `blockchain` URI scheme
+
+[BIP13]: https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki
+[BIP21]: https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki
+[BIP122]: https://github.com/bitcoin/bips/blob/master/bip-0122.mediawiki
+[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
+
+## Rights
+
+Copyright and related rights waived via CC0.

bip122/caip10.md

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+---
+namespace-identifier: bip122-caip10
+title: BIP122 Namespace - Addresses
+author: Simon Warta (@webmaster128), ligi <ligi@ligi.de>, Pedro Gomes (@pedrouid)
+discussions-to: https://github.com/ChainAgnostic/namespaces/pulls/3
+status: Draft
+type: Standard
+created: 2019-12-05
+updated: 2022-03-27
+requires: CAIP-2, CAIP-10
+replaces: CAIP-4
+---
+
+# CAIP-10
+
+*For context, see the [CAIP-10][] specification.*
+
+## Rationale
+
+While Ethereum "accounts" were the unstated norm in the definition of
+[CAIP-10][], the "script hashes" addressing schemed defined by [BIP13][] map
+well enough to "account"-model blockchains that these can be described by a
+CAIP-10 reference.   
+
+## Syntax
+
+See [Specification section of BIP13](https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki#Specification).
+
+### Backwards Compatibility
+
+Previously, the legacy CAIP-10 schema was defined by appending as suffix the
+CAIP-2 chainId delimited by the at sign (@)
+
+#### Legacy example
+
+`128Lkh3S7CkDTBZ8W7BbpsN3YYizJMp8p6@bip122:000000000019d6689c085ae165831e93`
+
+## Test Cases
+
+```
+# Bitcoin mainnet
+bip122:000000000019d6689c085ae165831e93:128Lkh3S7CkDTBZ8W7BbpsN3YYizJMp8p6
+
+# Litecoin
+bip122:12a765e31ffd4059bada1e25190f6e98:128Lkh3S7CkDTBZ8W7BbpsN3YYizJMp8p6
+```
+
+## References
+
+- [BIP13][]: Bitcoin Improvement Proposal specifying "Script Hash" addresses
+- [BIP21][]: Bitcoin Improvement Proposal specifying `bitcoin` URI scheme
+- [BIP122][]: Bitcoin Improvement Proposal specifying `blockchain` URI scheme
+
+[BIP13]: https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki
+[BIP21]: https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki
+[BIP122]: https://github.com/bitcoin/bips/blob/master/bip-0122.mediawiki
+[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
+
+## Rights
+
+Copyright and related rights waived via CC0.

bip122/caip2.md

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+---
+namespace-identifier: bip122-caip2
+title: BIP122 Namespace - Chains
+author: Simon Warta (@webmaster128), ligi <ligi@ligi.de>, Pedro Gomes (@pedrouid)
+discussions-to: https://github.com/ChainAgnostic/namespaces/pulls/3
+status: Draft
+type: Standard
+created: 2019-12-05
+updated: 2022-03-27
+requires: CAIP-2
+replaces: CAIP-4
+---
+
+# CAIP-2
+
+*For context, see the [CAIP-2][] specification.*
+
+## Rationale
+
+The chain ID identifiers for BIP122 are specified in [BIP122's chain ID
+definition](https://github.com/bitcoin/bips/blob/master/bip-0122.mediawiki#definition-of-chain-id).
+
+## Syntax
+
+The syntax for BIP122 chain ID can be summarized as a 32-character prefix from
+the hash of the genesis block of a given chain, in lowercase hex
+representation.
+
+### Resolution Method
+
+To query for a Chain ID to represent or checksum a BIP122 reference, make a
+JSON-RPC request to the blockchain node with method `getblockhash`, for example:
+
+```jsonc
+// Request
+{
+  "id": 1,
+  "jsonrpc": "2.0",
+  "method": "getblockhash",
+  "params": [0]
+}
+
+// Response
+{
+  "id": 1,
+  "jsonrpc": "2.0",
+  "result": "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"
+}
+```
+
+The response will return as a result value the hash for the block with height 0
+that should be sliced to its first 16 bytes (32 characters for base 16) to be
+compatible with the reference syntax defined above.
+
+## Test Cases
+
+This is a list of manually composed examples:
+
+```
+# Bitcoin mainnet (see [chain ID section of BIP122](https://github.com/bitcoin/bips/blob/master/bip-0122.mediawiki#definition-of-chain-id))
+bip122:000000000019d6689c085ae165831e93
+
+# Litecoin
+bip122:12a765e31ffd4059bada1e25190f6e98
+
+# Feathercoin (Litecoin fork)
+bip122:fdbe99b90c90bae7505796461471d89a
+```
+
+## References
+
+- [BIP13][]: Bitcoin Improvement Proposal specifying "Script Hash" addresses
+- [BIP21][]: Bitcoin Improvement Proposal specifying `bitcoin` URI scheme
+- [BIP122][]: Bitcoin Improvement Proposal specifying `blockchain` URI scheme
+
+[BIP13]: https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki
+[BIP21]: https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki
+[BIP122]: https://github.com/bitcoin/bips/blob/master/bip-0122.mediawiki
+[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
+
+## Rights
+
+Copyright and related rights waived via CC0.