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Spec's json_to_rlp.

This commit is contained in:
Gav Wood 2015-12-23 11:53:34 +00:00
parent be3f8ffd49
commit ff74e8239d
1 changed files with 22 additions and 3 deletions
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25
src/spec.rs
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@ -32,9 +32,28 @@ pub fn base_to_json(source: &[u8]) -> Json {
Json::from_str(&s).expect("Json is invalid")
}
/// Convert JSON value to equivlaent RLP representation.
// TODO: handle container types.
pub fn json_to_rlp(json: &Json) -> Bytes {
match json {
&Json::I64(o) => encode(&(o as u64)),
&Json::U64(o) => encode(&o),
&Json::String(ref s) if &s[0..2] == "0x" && U256::from_str(&s[2..]).is_ok() => {
encode(&U256::from_str(&s[2..]).unwrap())
},
&Json::String(ref s) => {
encode(s)
},
_ => panic!()
}
}
/// Convert JSON to a string->RLP map.
pub fn json_to_rlp(_json: &Json) -> HashMap<String, Bytes> {
unimplemented!();
pub fn json_to_rlp_map(json: &Json) -> HashMap<String, Bytes> {
json.as_object().unwrap().iter().map(|(k, v)| (k, json_to_rlp(v))).fold(HashMap::new(), |mut acc, kv| {
acc.insert(kv.0.clone(), kv.1);
acc
})
}
/// Parameters for a block chain; includes both those intrinsic to the design of the
@ -154,7 +173,7 @@ impl Spec {
Spec {
engine_name: json["engineName"].as_string().unwrap().to_string(),
engine_params: json_to_rlp(&json["params"]),
engine_params: json_to_rlp_map(&json["params"]),
builtins: builtins,
parent_hash: H256::from_str(&json["parentHash"].as_string().unwrap()[2..]).unwrap(),
author: Address::from_str(&json["coinbase"].as_string().unwrap()[2..]).unwrap(),