cardano-cli Plutus Datum JSON format support

rust/pkg/cardano_serialization_lib.js.flow

@@ -196,6 +196,26 @@ declare export function decrypt_with_password(
   data: string
 ): string;
 
+/**
+ * @param {string} json
+ * @param {number} schema
+ * @returns {PlutusData}
+ */
+declare export function encode_json_str_to_plutus_datum(
+  json: string,
+  schema: number
+): PlutusData;
+
+/**
+ * @param {PlutusData} datum
+ * @param {number} schema
+ * @returns {string}
+ */
+declare export function decode_plutus_datum_to_json_str(
+  datum: PlutusData,
+  schema: number
+): string;
+
 /**
  */
 
@@ -276,8 +296,8 @@ declare export var ScriptSchema: {|
 |};
 
 /**
+ * Used to choosed the schema for a script JSON string
  */
-
 declare export var TransactionMetadatumKind: {|
   +MetadataMap: 0, // 0
   +MetadataList: 1, // 1
@@ -320,6 +340,23 @@ declare export var LanguageKind: {|
   +PlutusV1: 0, // 0
 |};
 
+/**
+ */
+
+declare export var RedeemerTagKind: {|
+  +Spend: 0, // 0
+  +Mint: 1, // 1
+  +Cert: 2, // 2
+  +Reward: 3, // 3
+|};
+
+/**
+ */
+
+declare export var LanguageKind: {|
+  +PlutusV1: 0, // 0
+|};
+
 /**
  */
 
@@ -341,6 +378,23 @@ declare export var RedeemerTagKind: {|
   +Reward: 3, // 3
 |};
 
+/**
+ * JSON <-> PlutusData conversion schemas.
+ * Follows ScriptDataJsonSchema in cardano-cli defined at:
+ * https://github.com/input-output-hk/cardano-node/blob/master/cardano-api/src/Cardano/Api/ScriptData.hs#L254
+ *
+ * All methods here have the following restrictions due to limitations on dependencies:
+ * * JSON numbers above u64::MAX (positive) or below i64::MIN (negative) will throw errors
+ * * Hex strings for bytes don't accept odd-length (half-byte) strings.
+ *       cardano-cli seems to support these however but it seems to be different than just 0-padding
+ *       on either side when tested so proceed with caution
+ */
+
+declare export var PlutusDatumSchema: {|
+  +BasicConversions: 0, // 0
+  +DetailedSchema: 1, // 1
+|};
+
 /**
  */
 declare export class Address {
@@ -653,6 +707,11 @@ declare export class BigInt {
    */
   as_u64(): BigNum | void;
 
+  /**
+   * @returns {Int | void}
+   */
+  as_int(): Int | void;
+
   /**
    * @param {string} text
    * @returns {BigInt}