CIP-0029 | Phase-1 Monetary Scripts Serialization Formats

CIP-0029/CIP-0029.md

@@ -0,0 +1,103 @@
+---
+CIP: 29
+Title: Phase-1 Monetary Scripts Serialization Formats
+Authors: Matthias Benkort <[email protected]>
+Comments-URI: https://github.com/cardano-foundation/CIPs/pulls/117
+Status: Draft
+Type: Standards
+Created: 2020-08-17
+License: CC-BY-4.0
+---
+
+# Abstract
+
+This specification describes how to serialize Phase-1 monetary scripts (a.k.a. _"native scripts"_) to various formats (JSON, CBOR) to facilitate inter-operability between applications. 
+
+# Motivation
+
+While the existence of scripts is well-known, and have an unambiguous on-chain representation. There's no agreed upon format for off-chain or higher-level interfaces for which a binary string is a poor fit. This CIP regroups both the on-chain binary format and other, more verbose, formats like JSON.
+
+# Specification
+
+This specification covers at present two serialization formats: JSON and CBOR. The CBOR matches exactly the on-chain representation and is extracted from the cardano-ledger-specs source code and put here as a convenient place to lookup while the source can change location over time. 
+
+## CBOR
+
+The CBOR serialization format is given as a [CDDL specification in annexe](./phase-1-monetary-scripts.cddl). When a hash of the phase-1 monetary script is needed, it usually refers to a Blake2b-192 digest of the corresponding serialized script byte-string prefixed with a null byte: `\x00`. 
+
+## JSON 
+
+The JSON format is given as a [JSON schema in annexe](./phiase-1-monetary-scripts.json). It is preferred in user interfaces such as command-lines or APIs, where some level of human inspection may be required. 
+
+## Notes
+
+- Scripts may contain unbounded integers! Implementation parsing them, either from CBOR or JSON shall be prepared to handle possible big integers (>= 2^64).
+
+# Rationale
+
+- The preimage for computing script hashes is prefixed with `\x00` to distinguish them from phase-2 monetary scripts (a.k.a Plutus Script) which are then prefixed with `\x01`. This is merely a discriminator tag.
+
+- The current JSON format is based off the cardano-cli's format which has been used widely for minting tokens and is likely the most widely accepted format at the moment.
+
+# Backward Compatibility
+
+N/A
+
+# Reference Implementation(s)
+
+- [cardano-cli](https://github.com/input-output-hk/cardano-node/tree/master/cardano-cli) & [cardano-api](https://github.com/input-output-hk/cardano-node/tree/master/cardano-api)
+
+## Test Vectors
+
+```yaml
+- json:
+    { "type": "sig"
+    , "keyHash": "00000000000000000000000000000000000000000000000000000000"
+    }
+  cbor: 
+    "8200581c00000000000000000000000000000000000000000000000000000000"
+
+- json:
+    { "type": "all"
+    , "scripts":
+      [ { "type": "sig"
+        , "keyHash": "00000000000000000000000000000000000000000000000000000000"
+        }
+      , { "type": "any"
+        , "scripts": 
+          [ { "type": "after"
+            , "slot": 42
+            }
+          , { "type": "sig"
+            , "keyHash": "00000000000000000000000000000000000000000000000000000001"
+            }
+          ]
+        }
+      ]
+    }
+  cbor:
+    "8201828200581c000000000000000000000000000000000000000000000000000000008202828204182a8200581c00000000000000000000000000000000000000000000000000000001"
+
+- json:
+    { "type": "before"
+    , "slot": 42
+    }
+  cbor: 
+    "8205182a"
+
+- json:
+    { "type": "atLeast"
+    , "required": 2
+    , "scripts":
+      [ { "type": "sig", "keyHash": "00000000000000000000000000000000000000000000000000000000" }
+      , { "type": "sig", "keyHash": "00000000000000000000000000000000000000000000000000000001" }
+      , { "type": "sig", "keyHash": "00000000000000000000000000000000000000000000000000000002" }
+      ]
+    }
+  cbor:
+    "00830302838200581c000000000000000000000000000000000000000000000000000000008200581c000000000000000000000000000000000000000000000000000000018200581c00000000000000000000000000000000000000000000000000000002"
+```
+
+# Copyright
+
+CC-BY-4.0

CIP-0029/phase-1-monetary-scripts.cddl

@@ -0,0 +1,33 @@
+script =
+  [  script_key
+  // script_all
+  // script_any
+  // script_n_of_k
+  // script_after
+  // script_before
+  ]
+
+script_key =
+  (0, keyhash)
+
+script_all =
+  (1, [ * script ])
+
+script_any =
+  (2, [ * script ])
+
+script_n_of_k =
+  (3, n: uint, [ * script ])
+
+; Timelock validity intervals are half-open intervals [a, b).
+; This field specifies the left (included) endpoint a.
+script_after =
+  (4, uint)
+
+; Timelock validity intervals are half-open intervals [a, b).
+; This field specifies the right (excluded) endpoint b.
+script_before =
+  (5, uint)
+
+keyhash =
+  bytes .size 28

CIP-0029/phase-1-monetary-scripts.json

@@ -0,0 +1,109 @@
+{ "$schema": "<https://json-schema.org/draft-07/schema>"
+, "title": "Phase-1 Monetary Scripts"
+, "oneOf":
+    [ { "$ref": "#/definitions/Script@keyHash" }
+    , { "$ref": "#/definitions/Script@after" }
+    , { "$ref": "#/definitions/Script@before" }
+    , { "$ref": "#/definitions/Script@any" }
+    , { "$ref": "#/definitions/Script@all" }
+    , { "$ref": "#/definitions/Script@atLeast" }
+    ]
+, "definitions":
+    { "Script@keyHash":
+        { "type": "object"
+        , "additionalProperties": false
+        , "required": [ "type", "keyHash" ]
+        , "properties":
+            { "type":
+                { "type": "string"
+                , "enum": [ "sig" ]
+                }
+            , "keyHash":
+                { "type": "string"
+                , "encoding": "base16"
+                , "minLength": 56
+                , "maxLength": 56
+                }
+            }
+        }
+    , "Script@before":
+        { "type": "object"
+        , "additionalProperties": false
+        , "required": [ "type", "slot" ]
+        , "properties":
+            { "type":
+                { "type": "string"
+                , "enum": [ "before" ]
+                }
+            , "slot":
+                { "type": "integer"
+                , "minimum": 1
+                }
+            }
+        }
+    , "Script@after":
+        { "type": "object"
+        , "additionalProperties": false
+        , "required": [ "type", "slot" ]
+        , "properties":
+            { "type":
+                { "type": "string"
+                , "enum": [ "after" ]
+                }
+            , "slot":
+                { "type": "integer"
+                , "minimum": 1
+                }
+            }
+        }
+    , "Script@any":
+        { "type": "object"
+        , "additionalProperties": false
+        , "required": [ "type", "scripts" ]
+        , "properties":
+            { "type":
+                { "type": "string"
+                , "enum": [ "any" ]
+                }
+            , "scripts":
+              { "type": "array"
+              , "items": { "$ref": "#" }
+              }
+            }
+        }
+    , "Script@all":
+        { "type": "object"
+        , "additionalProperties": false
+        , "required": [ "type", "scripts" ]
+        , "properties":
+            { "type":
+                { "type": "string"
+                , "enum": [ "all" ]
+                }
+            , "scripts":
+              { "type": "array"
+              , "items": { "$ref": "#" }
+              }
+            }
+        }
+    , "Script@atLeast":
+        { "type": "object"
+        , "additionalProperties": false
+        , "required": [ "type", "required", "scripts" ]
+        , "properties":
+            { "type":
+                { "type": "string"
+                , "enum": [ "atLeast" ]
+                }
+            , "required":
+                { "type": "integer"
+                , "minimum": 0
+                }
+            , "scripts":
+              { "type": "array"
+              , "items": { "$ref": "#" }
+              }
+            }
+        }
+    }
+}

README.md

@@ -30,6 +30,7 @@ The current process is described in details in [CIP1 - "CIP Process"](./CIP-0001
 | 23 | [Fair Min Fees](./CIP-0023/CIP-0023.md) | Draft |
 | 24 | [Non-Centralizing Rankings](./CIP-0024/CIP-0024.md) | Draft |
 | 25 | [NFT Metadata Standard](./CIP-0025/CIP-0025.md) | Draft |
+| 29 | [Phase-1 Monetary Scripts Serialization Formats](./CIP-0029/CIP-0029.md) | Draft |
 | 1852 | [HD (Hierarchy for Deterministic) Wallets for Cardano](./CIP-1852/CIP-1852.md) | Draft |
 | 1853 | [HD (Hierarchy for Deterministic) Stake Pool Cold Keys for Cardano](./CIP-1853/CIP-1853.md) | Draft |
 | 1854 | [Multi-signatures HD Wallets](./CIP-1854/CIP-1854.md) | Draft |