Starkfelt decimal

src/hash.rs

@@ -7,6 +7,7 @@ use std::io::Error;
 
 use serde::{Deserialize, Serialize};
 use starknet_crypto::{pedersen_hash as starknet_crypto_pedersen_hash, FieldElement};
+use web3::types::U256;
 
 use crate::serde_utils::{
     bytes_from_hex_str, hex_str_from_bytes, BytesAsHex, NonPrefixedBytesAsHex, PrefixedBytesAsHex,
@@ -49,6 +50,24 @@ pub fn pedersen_hash_array(felts: &[StarkFelt]) -> StarkHash {
 #[serde(try_from = "PrefixedBytesAsHex<32_usize>", into = "PrefixedBytesAsHex<32_usize>")]
 pub struct StarkFelt([u8; 32]);
 
+#[derive(Clone, Copy, Eq, PartialEq, Default)]
+pub struct StarkFeltAsDecimal(U256);
+
+impl Serialize for StarkFeltAsDecimal {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(&self.0.to_string())
+    }
+}
+
+impl Display for StarkFeltAsDecimal {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.0.to_string())
+    }
+}
+
 impl StarkFelt {
     /// Returns a new [`StarkFelt`].
     pub fn new(bytes: [u8; 32]) -> Result<StarkFelt, StarknetApiError> {
@@ -201,6 +220,18 @@ impl TryFrom<StarkFelt> for usize {
     }
 }
 
+impl From<StarkFelt> for U256 {
+    fn from(felt: StarkFelt) -> Self {
+        web3::types::U256::from_big_endian(&felt.0)
+    }
+}
+
+impl From<StarkFelt> for StarkFeltAsDecimal {
+    fn from(felt: StarkFelt) -> Self {
+        StarkFeltAsDecimal(U256::from(felt))
+    }
+}
+
 impl Debug for StarkFelt {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         self.str_format(f)

src/hash_test.rs

@@ -1,4 +1,4 @@
-use crate::hash::{pedersen_hash, pedersen_hash_array, StarkFelt};
+use crate::hash::{pedersen_hash, pedersen_hash_array, StarkFelt, StarkFeltAsDecimal};
 use crate::stark_felt;
 
 #[test]
@@ -67,3 +67,16 @@ fn hash_serde() {
         assert_eq!(bytes, d.0);
     }
 }
+
+#[test]
+fn stark_felt_from_hex_to_decimal() {
+    let felt = stark_felt!("0x000000000000d");
+    assert_eq!(StarkFeltAsDecimal::from(felt).to_string(), "13");
+
+    let felt = stark_felt!("0x264d6571d5f186bab2a9d5d8d30aa38bf5502bc4354870edbfe194c6f655c9b");
+    let felt_decimal = StarkFeltAsDecimal::from(felt);
+    assert_eq!(
+        felt_decimal.to_string(),
+        "1082789725971120866445625682125121757273101071727151005357998861560691645595"
+    );
+}