pub fn decode_plutus_datum_to_json_value(
datum: &PlutusData,
schema: PlutusDatumSchema
) -> Result<Value, JsError>Examples found in repository?
src/plutus.rs (line 1198)
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pub fn decode_plutus_datum_to_json_str(
datum: &PlutusData,
schema: PlutusDatumSchema,
) -> Result<String, JsError> {
let value = decode_plutus_datum_to_json_value(datum, schema)?;
serde_json::to_string(&value).map_err(|e| JsError::from_str(&e.to_string()))
}
//TODO: move it to deserialize impl
pub fn decode_plutus_datum_to_json_value(
datum: &PlutusData,
schema: PlutusDatumSchema,
) -> Result<serde_json::Value, JsError> {
use serde_json::Value;
let (type_tag, json_value) = match &datum.datum {
PlutusDataEnum::ConstrPlutusData(constr) => {
let mut obj = serde_json::map::Map::with_capacity(2);
obj.insert(
String::from("constructor"),
Value::from(from_bignum(&constr.alternative))
);
let mut fields = Vec::new();
for field in constr.data.elems.iter() {
fields.push(decode_plutus_datum_to_json_value(field, schema)?);
}
obj.insert(
String::from("fields"),
Value::from(fields)
);
(None, Value::from(obj))
},
PlutusDataEnum::Map(map) => match schema {
PlutusDatumSchema::BasicConversions => (None, Value::from(map.0.iter().map(|(key, value)| {
let json_key: String = match &key.datum {
PlutusDataEnum::ConstrPlutusData(_) => Err(JsError::from_str("plutus data constructors are not allowed as keys in this schema. Use DetailedSchema.")),
PlutusDataEnum::Map(_) => Err(JsError::from_str("plutus maps are not allowed as keys in this schema. Use DetailedSchema.")),
PlutusDataEnum::List(_) => Err(JsError::from_str("plutus lists are not allowed as keys in this schema. Use DetailedSchema.")),
PlutusDataEnum::Integer(x) => Ok(x.to_str()),
PlutusDataEnum::Bytes(bytes) => String::from_utf8(bytes.clone()).or_else(|_err| Ok(format!("0x{}", hex::encode(bytes))))
}?;
let json_value = decode_plutus_datum_to_json_value(value, schema)?;
Ok((json_key, Value::from(json_value)))
}).collect::<Result<serde_json::map::Map<String, Value>, JsError>>()?)),
PlutusDatumSchema::DetailedSchema => (Some("map"), Value::from(map.0.iter().map(|(key, value)| {
let k = decode_plutus_datum_to_json_value(key, schema)?;
let v = decode_plutus_datum_to_json_value(value, schema)?;
let mut kv_obj = serde_json::map::Map::with_capacity(2);
kv_obj.insert(String::from("k"), k);
kv_obj.insert(String::from("v"), v);
Ok(Value::from(kv_obj))
}).collect::<Result<Vec<_>, JsError>>()?)),
},
PlutusDataEnum::List(list) => {
let mut elems = Vec::new();
for elem in list.elems.iter() {
elems.push(decode_plutus_datum_to_json_value(elem, schema)?);
}
(Some("list"), Value::from(elems))
},
PlutusDataEnum::Integer(bigint) => (
Some("int"),
bigint
.as_int()
.as_ref()
.map(|int| if int.0 >= 0 { Value::from(int.0 as u64) } else { Value::from(int.0 as i64) })
.ok_or_else(|| JsError::from_str(&format!("Integer {} too big for our JSON support", bigint.to_str())))?
),
PlutusDataEnum::Bytes(bytes) => (Some("bytes"), Value::from(match schema {
PlutusDatumSchema::BasicConversions => {
// cardano-cli converts to a string only if bytes are utf8 and all characters are printable
String::from_utf8(bytes.clone())
.ok()
.filter(|utf8| utf8.chars().all(|c| !c.is_control()))
// otherwise we hex-encode the bytes with a 0x prefix
.unwrap_or_else(|| format!("0x{}", hex::encode(bytes)))
},
PlutusDatumSchema::DetailedSchema => hex::encode(bytes),
})),
};
if type_tag.is_none() || schema != PlutusDatumSchema::DetailedSchema {
Ok(json_value)
} else {
let mut wrapper = serde_json::map::Map::with_capacity(1);
wrapper.insert(String::from(type_tag.unwrap()), json_value);
Ok(Value::from(wrapper))
}
}