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#[cfg(not(all(target_arch = "wasm32", not(target_os = "emscripten"))))]
use noop_proc_macro::wasm_bindgen;
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
use wasm_bindgen::prelude::*;
use std::collections::HashMap;
use hex::FromHex;
use crate::{NativeScript, error::JsError, crypto::Bip32PublicKey, ScriptPubkey, NativeScripts, ScriptAll, ScriptAny, ScriptNOfK, TimelockStart, TimelockExpiry};
#[wasm_bindgen]
pub enum ScriptSchema {
Wallet,
Node,
}
#[wasm_bindgen]
pub fn encode_json_str_to_native_script(
json: &str,
self_xpub: &str,
schema: ScriptSchema,
) -> Result<NativeScript, JsError> {
let value: serde_json::Value =
serde_json::from_str(json).map_err(|e| JsError::from_str(&e.to_string()))?;
let native_script = match schema {
ScriptSchema::Wallet => encode_wallet_value_to_native_script(value, self_xpub)?,
ScriptSchema::Node => todo!(),
};
Ok(native_script)
}
fn encode_wallet_value_to_native_script(value: serde_json::Value, self_xpub: &str) -> Result<NativeScript, JsError> {
match value {
serde_json::Value::Object(map)
if map.contains_key("cosigners") && map.contains_key("template") =>
{
let mut cosigners = HashMap::new();
if let serde_json::Value::Object(cosigner_map) = map.get("cosigners").unwrap() {
for (key, value) in cosigner_map.iter() {
if let serde_json::Value::String(xpub) = value {
if xpub == "self" {
cosigners.insert(key.to_owned(), self_xpub.to_owned());
} else {
cosigners.insert(key.to_owned(), xpub.to_owned());
}
} else {
return Err(JsError::from_str("cosigner value must be a string"));
}
}
} else {
return Err(JsError::from_str("cosigners must be a map"));
}
let template = map.get("template").unwrap();
let template_native_script = encode_template_to_native_script(template, &cosigners)?;
Ok(template_native_script)
}
_ => Err(JsError::from_str(
"top level must be an object. cosigners and template keys are required",
)),
}
}
fn encode_template_to_native_script(
template: &serde_json::Value,
cosigners: &HashMap<String, String>,
) -> Result<NativeScript, JsError> {
match template {
serde_json::Value::String(cosigner) => {
if let Some(xpub) = cosigners.get(cosigner) {
let bytes =
Vec::from_hex(xpub).map_err(|e| JsError::from_str(&e.to_string()))?;
let public_key = Bip32PublicKey::from_bytes(&bytes)?;
Ok(NativeScript::new_script_pubkey(&ScriptPubkey::new(
&public_key.to_raw_key().hash(),
)))
} else {
Err(JsError::from_str(&format!("cosigner {} not found", cosigner)))
}
}
serde_json::Value::Object(map) if map.contains_key("all") => {
let mut all = NativeScripts::new();
if let serde_json::Value::Array(array) = map.get("all").unwrap() {
for val in array {
all.add(&encode_template_to_native_script(val, cosigners)?);
}
} else {
return Err(JsError::from_str("all must be an array"));
}
Ok(NativeScript::new_script_all(&ScriptAll::new(&all)))
}
serde_json::Value::Object(map) if map.contains_key("any") => {
let mut any = NativeScripts::new();
if let serde_json::Value::Array(array) = map.get("any").unwrap() {
for val in array {
any.add(&encode_template_to_native_script(val, cosigners)?);
}
} else {
return Err(JsError::from_str("any must be an array"));
}
Ok(NativeScript::new_script_any(&ScriptAny::new(&any)))
}
serde_json::Value::Object(map) if map.contains_key("some") => {
if let serde_json::Value::Object(some) = map.get("some").unwrap() {
if some.contains_key("at_least") && some.contains_key("from") {
let n = if let serde_json::Value::Number(at_least) =
some.get("at_least").unwrap()
{
if let Some(n) = at_least.as_u64() {
n as u32
} else {
return Err(JsError::from_str("at_least must be an integer"));
}
} else {
return Err(JsError::from_str("at_least must be an integer"));
};
let mut from_scripts = NativeScripts::new();
if let serde_json::Value::Array(array) = some.get("from").unwrap() {
for val in array {
from_scripts
.add(&encode_template_to_native_script(val, cosigners)?);
}
} else {
return Err(JsError::from_str("from must be an array"));
}
Ok(NativeScript::new_script_n_of_k(&ScriptNOfK::new(
n,
&from_scripts,
)))
} else {
Err(JsError::from_str("some must contain at_least and from"))
}
} else {
Err(JsError::from_str("some must be an object"))
}
}
serde_json::Value::Object(map) if map.contains_key("active_from") => {
if let serde_json::Value::Number(active_from) = map.get("active_from").unwrap() {
if let Some(slot) = active_from.as_u64() {
let time_lock_start = TimelockStart::new(&slot.into());
Ok(NativeScript::new_timelock_start(&time_lock_start))
} else {
Err(JsError::from_str(
"active_from slot must be an integer greater than or equal to 0",
))
}
} else {
Err(JsError::from_str("active_from slot must be a number"))
}
}
serde_json::Value::Object(map) if map.contains_key("active_until") => {
if let serde_json::Value::Number(active_until) = map.get("active_until").unwrap() {
if let Some(slot) = active_until.as_u64() {
let time_lock_expiry = TimelockExpiry::new(&slot.into());
Ok(NativeScript::new_timelock_expiry(&time_lock_expiry))
} else {
Err(JsError::from_str(
"active_until slot must be an integer greater than or equal to 0",
))
}
} else {
Err(JsError::from_str("active_until slot must be a number"))
}
}
_ => Err(JsError::from_str("invalid template format")),
}
}
