161 lines
4.1 KiB
Rust
161 lines
4.1 KiB
Rust
/// https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-2.md
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use std::fmt;
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use std::str::FromStr;
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use regex::Regex;
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use serde::{
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Deserialize,
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Deserializer,
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Serialize,
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Serializer,
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de::Error as DeserializerError,
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};
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const CAIP2_RE: &str = r"(?P<namespace>[-a-z0-9]{3,8}):(?P<reference>[-a-zA-Z0-9]{1,32})";
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const CAIP2_ETHEREUM_NAMESPACE: &str = "eip155";
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const CAIP2_MONERO_NAMESPACE: &str = "monero"; // unregistered namespace
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const ETHEREUM_MAINNET_ID: i32 = 1;
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const ETHEREUM_DEVNET_ID: i32 = 31337;
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#[derive(Clone, Debug, PartialEq)]
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pub struct ChainId {
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pub namespace: String,
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pub reference: String,
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}
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impl ChainId {
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pub fn ethereum_mainnet() -> Self {
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Self {
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namespace: CAIP2_ETHEREUM_NAMESPACE.to_string(),
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reference: ETHEREUM_MAINNET_ID.to_string(),
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}
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}
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pub fn ethereum_devnet() -> Self {
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Self {
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namespace: CAIP2_ETHEREUM_NAMESPACE.to_string(),
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reference: ETHEREUM_DEVNET_ID.to_string(),
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}
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}
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pub fn is_ethereum(&self) -> bool {
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self.namespace == CAIP2_ETHEREUM_NAMESPACE
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}
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pub fn is_monero(&self) -> bool {
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self.namespace == CAIP2_MONERO_NAMESPACE
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}
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}
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#[derive(thiserror::Error, Debug)]
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#[error("Chain ID parse error")]
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pub struct ChainIdError;
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impl FromStr for ChainId {
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type Err = ChainIdError;
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fn from_str(value: &str) -> Result<Self, Self::Err> {
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let caip2_re = Regex::new(CAIP2_RE).unwrap();
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let caps = caip2_re.captures(value).ok_or(ChainIdError)?;
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let chain_id = Self {
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namespace: caps["namespace"].to_string(),
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reference: caps["reference"].to_string(),
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};
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Ok(chain_id)
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}
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}
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impl fmt::Display for ChainId {
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fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(formatter, "{}:{}", self.namespace, self.reference)
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}
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}
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impl Serialize for ChainId {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where S: Serializer
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{
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serializer.serialize_str(&self.to_string())
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}
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}
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impl<'de> Deserialize<'de> for ChainId {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where D: Deserializer<'de>
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{
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String::deserialize(deserializer)?
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.parse().map_err(DeserializerError::custom)
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}
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}
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mod sql {
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use postgres_protocol::types::{text_from_sql, text_to_sql};
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use postgres_types::{
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accepts,
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private::BytesMut,
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to_sql_checked,
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FromSql,
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IsNull,
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ToSql,
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Type,
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};
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use super::ChainId;
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impl<'a> FromSql<'a> for ChainId {
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fn from_sql(
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_: &Type,
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raw: &'a [u8],
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) -> Result<Self, Box<dyn std::error::Error + Sync + Send>> {
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let value_str = text_from_sql(raw)?;
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let value: Self = value_str.parse()?;
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Ok(value)
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}
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accepts!(VARCHAR);
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}
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impl ToSql for ChainId {
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fn to_sql(
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&self,
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_: &Type,
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out: &mut BytesMut,
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) -> Result<IsNull, Box<dyn std::error::Error + Sync + Send>> {
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let value_str = self.to_string();
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text_to_sql(&value_str, out);
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Ok(IsNull::No)
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}
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accepts!(VARCHAR, TEXT);
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to_sql_checked!();
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_parse_bitcoin_chain_id() {
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let value = "bip122:000000000019d6689c085ae165831e93";
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let chain_id = value.parse::<ChainId>().unwrap();
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assert_eq!(chain_id.namespace, "bip122");
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assert_eq!(chain_id.reference, "000000000019d6689c085ae165831e93");
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assert_eq!(chain_id.to_string(), value);
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}
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#[test]
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fn test_parse_ethereum_chain_id() {
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let value = "eip155:1";
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let chain_id = value.parse::<ChainId>().unwrap();
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assert_eq!(chain_id.namespace, "eip155");
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assert_eq!(chain_id.reference, "1");
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assert_eq!(chain_id.to_string(), value);
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}
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#[test]
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fn test_parse_invalid_chain_id() {
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let value = "eip155/1/abcde";
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assert!(value.parse::<ChainId>().is_err());
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}
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}
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