Add hive namespace with CAIP-2 and CAIP-10 profiles

hive/README.md

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+---
+namespace-identifier: hive
+title: Hive
+author: ["@feruzm"]
+discussions-to: https://github.com/ChainAgnostic/namespaces/pull/174
+status: Draft
+type: Informational
+created: 2026-02-25
+requires: ["CAIP-2"]
+---
+
+# Namespace for Hive
+
+Hive is a delegated-proof-of-stake (DPoS) blockchain focused on social applications, digital publishing, and fast fee-less transactions. It uses account-based identity with human-readable account names.
+
+This document defines the `hive` namespace as a Chain Agnostic Namespace (CAN) to allow standardized identification of Hive networks across multichain tooling using CAIP specifications.
+
+## Rationale
+
+Registering the `hive` namespace enables:
+
+- Standard CAIP-2 chain identifiers for Hive networks
+- Use of CAIP-10 account identifiers for Hive account names
+- Interoperability with multichain wallets and tooling
+- Deterministic identification of Hive networks (mainnet, mirrornet)
+
+Hive networks expose a protocol-defined `chain_id` used in transaction signing to prevent cross-network replay. This makes Hive suitable for deterministic CAIP-2 identification.
+
+## Governance
+
+Hive operates using a Delegated Proof of Stake (DPoS) consensus model. Network upgrades and parameter changes are coordinated by elected block producers ("witnesses") and stakeholders through on-chain governance mechanisms.
+
+## References
+
+- Hive homepage: https://hive.io/
+- Hive developer portal: https://developers.hive.io/
+- Hive configuration values (includes chain_id):  
+  https://developers.hive.io/tutorials-recipes/understanding-configuration-values.html
+
+## Copyright
+
+Copyright and related rights waived via CC0 1.0.

hive/caip10.md

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+---
+namespace-identifier: hive-caip10
+title: Hive Namespace - CAIP-10 Account Identifiers
+author: ["@feruzm"]
+discussions-to: https://github.com/ChainAgnostic/namespaces/pull/174
+status: Draft
+type: Standard
+created: 2026-02-25
+requires: ["CAIP-2", "CAIP-10"]
+---
+
+# CAIP-10
+
+For context, see the CAIP-10 specification:
+https://chainagnostic.org/CAIPs/caip-10
+
+## Rationale
+
+Hive uses account-based identity with human-readable account names rather than hexadecimal address formats.
+
+Each Hive account name:
+
+- Is globally unique within a Hive network
+- Is used directly in transaction operations
+- Is validated at the protocol level
+- Is constrained by naming rules enforced by consensus
+
+Because Hive accounts are stable identifiers and tied to a specific chain via `chain_id`, they are suitable for CAIP-10 account identifiers.
+
+## Specification
+
+A Hive CAIP-10 account identifier MUST follow:
+
+`hive:<reference>:<account>`
+
+Where:
+
+- `hive` is the namespace
+- `<reference>` is defined by the Hive CAIP-2 profile
+- `<account>` is a valid Hive account name
+
+### Account Format
+
+Hive account names MUST:
+
+- Be between 3 and 16 characters in total length
+- Start with a lowercase letter (`a-z`)
+- Contain only lowercase letters (`a-z`), digits (`0-9`), hyphens (`-`), and dots (`.`)
+- Not start or end with a hyphen or dot
+- Not contain consecutive hyphens or dots
+- If dot-separated, each segment must be at least 3 characters and start with a letter
+
+Regex:
+
+```
+^(?=.{3,16}$)[a-z]([0-9a-z]|[0-9a-z\-](?=[0-9a-z])){2,}([\.](?=[a-z][0-9a-z\-][0-9a-z\-])[a-z]([0-9a-z]|[0-9a-z\-](?=[0-9a-z])){1,}){0,}$
+```
+
+### Resolution
+
+To validate a Hive CAIP-10 identifier:
+
+1. Parse the namespace (`hive`).
+2. Validate the CAIP-2 reference according to the Hive CAIP-2 profile.
+3. Validate the account name against Hive naming rules.
+4. Query a Hive RPC endpoint to confirm account existence.
+
+Account existence may be verified via:
+
+- `condenser_api.get_accounts`
+- `database_api.find_accounts`
+
+#### Example Request
+
+```json
+{
+  "jsonrpc": "2.0",
+  "method": "condenser_api.get_accounts",
+  "params": [["ecency"]],
+  "id": 1
+}
+```
+
+## Examples
+
+### Hive Mainnet
+
+```
+hive:beeab0de000000000000000000000000:ecency
+hive:beeab0de000000000000000000000000:good-karma
+hive:beeab0de000000000000000000000000:hive.fund
+hive:beeab0de000000000000000000000000:v4vapp.dhf
+```
+
+### Hive Mirrornet
+
+```
+hive:42000000000000000000000000000000:testuser
+```
+
+## Security Considerations
+
+Hive account names are human-readable and may be subject to phishing using visually similar names (e.g., `ecency` vs `ecency-fake`).
+
+Applications SHOULD:
+
+- Validate account existence before processing transactions
+- Display full CAIP-10 identifiers when clarity is required
+- Not assume account ownership without authority verification
+
+Because Hive supports multiple authorities (owner, active, posting), CAIP-10 identifiers represent accounts, not individual keys.
+
+## Test Cases
+
+Valid:
+
+```
+hive:beeab0de000000000000000000000000:ecency
+hive:beeab0de000000000000000000000000:good-karma
+hive:beeab0de000000000000000000000000:hive.fund
+hive:beeab0de000000000000000000000000:gtg
+hive:42000000000000000000000000000000:test-account
+```
+
+Invalid:
+
+```
+hive:beeab0de000000000000000000000000:UpperCase
+hive:beeab0de000000000000000000000000:ab
+hive:beeab0de000000000000000000000000:-invalid
+hive:beeab0de000000000000000000000000:3digits
+hive:beeab0de000000000000000000000000:has..double
+```
+
+## References
+
+- Hive configuration and account rules:
+  https://developers.hive.io/tutorials-recipes/understanding-configuration-values.html
+- CAIP-10 specification:
+  https://chainagnostic.org/CAIPs/caip-10
+
+## Copyright
+
+Copyright and related rights waived via CC0 1.0.

hive/caip2.md

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+---
+namespace-identifier: hive-caip2
+title: Hive Namespace - CAIP-2 Chain Identifiers
+author: ["@feruzm"]
+discussions-to: https://github.com/ChainAgnostic/namespaces/pull/174
+status: Draft
+type: Standard
+created: 2026-02-25
+requires: CAIP-2
+---
+
+# CAIP-2
+
+For context, see the CAIP-2 specification:
+https://chainagnostic.org/CAIPs/caip-2
+
+## Rationale
+
+Hive defines a 32-byte (`64` hex characters) `chain_id` value used for transaction signing and network identification.
+
+Because CAIP-2 restricts the `reference` field to a maximum of 32 characters, this specification defines the `reference` as:
+
+> The first 32 lowercase hexadecimal characters of Hive's `chain_id`.
+
+This approach ensures:
+
+- Deterministic chain identification
+- Compatibility with CAIP-2 length constraints
+- Collision resistance appropriate for blockchain network identifiers
+- Alignment with other CAIP-2 namespace implementations
+
+## Specification
+
+### Namespace
+
+`hive`
+
+### Reference
+
+The `reference` MUST:
+
+- Be lowercase hexadecimal
+- Match the pattern: `[0-9a-f]{32}`
+
+### Resolution
+
+To derive a valid CAIP-2 identifier:
+
+1. Query a Hive node using `database_api.get_config`.
+2. Retrieve the `HIVE_CHAIN_ID` value from the response.
+3. Convert to lowercase.
+4. Truncate to the first 32 hexadecimal characters.
+
+#### Example Request
+
+```json
+{
+  "jsonrpc": "2.0",
+  "method": "database_api.get_config",
+  "id": 1
+}
+```
+
+#### Example Response (partial)
+
+```json
+{
+  "HIVE_CHAIN_ID": "beeab0de00000000000000000000000000000000000000000000000000000000"
+}
+```
+
+## Known Networks (Non-Normative Examples)
+
+### Hive Mainnet
+
+Full chain_id: `beeab0de00000000000000000000000000000000000000000000000000000000`
+CAIP-2: `hive:beeab0de000000000000000000000000`
+
+---
+
+### Hive Mirrornet
+
+Full chain_id: `42`
+CAIP-2: `hive:42000000000000000000000000000000` (zero-padded to 32 hex characters)
+
+> **Note:** The mirrornet is a periodic snapshot of mainnet used for testing. There is no permanent public testnet at this time; mirrornet instances are ephemeral.
+
+## Security Considerations
+
+Applications MUST validate network configuration before accepting CAIP-2 identifiers.
+
+Hive uses account-based identity rather than address-based identity. Applications implementing CAIP-10 should validate account existence via RPC.
+
+## Test Cases
+
+```
+hive:beeab0de000000000000000000000000
+hive:42000000000000000000000000000000
+```
+
+## References
+
+- Hive configuration documentation:
+  https://developers.hive.io/tutorials-recipes/understanding-configuration-values.html
+- CAIP-2 specification:
+  https://chainagnostic.org/CAIPs/caip-2
+
+## Copyright
+
+Copyright and related rights waived via CC0 1.0.