fixes

Author: jialinli98

ethereum/circuits/lib/Nargo.toml

@@ -5,6 +5,5 @@ authors = ["Arkadiusz Konior, Marek Kirejczyk"]
 compiler_version = ">=0.30.0"
 
 [dependencies]
-u2b = { tag = "v0.3.4", git = "https://github.com/vlayer-xyz/noir-u2b" }
 bignum = { tag = "v0.8.2", git = "https://github.com/noir-lang/noir-bignum" }
 keccak256 = {tag = "v0.1.1", git = "https://github.com/noir-lang/keccak256" }

ethereum/circuits/lib/src/rlp/types.nr

@@ -1,7 +1,8 @@
 use crate::misc::bytes::byte_value;
 use crate::misc::fragment::Fragment;
 use crate::misc::types::{Address, Bytes32};
-use dep::u2b::{u32_to_u8, u64_to_u8};
+use crate::verifiers::tx_helpers::idx::u32_to_u8;
+use crate::verifiers::tx_helpers::idx::u64_to_u8;
 
 // Enum for RLP data type
 pub(crate) global STRING: u32 = 0;

ethereum/circuits/lib/src/verifiers/tx_helpers/idx.nr

@@ -2,7 +2,6 @@ use crate::misc::arrays::{memcpy, sub_array_equals_up_to_length};
 use crate::misc::bytes::{left_to_right_padding, nibbles_to_bytes, right_pad};
 use crate::misc::fragment::Fragment;
 use crate::rlp::{decode::decode_string, types::RlpFragment};
-use dep::u2b::u32_to_u8;
 
 global KEY_NIBBLE_LEN: u32 = 6;
 global MAX_TX_IDX_BYTES_LEN: u32 = 2;
@@ -24,3 +23,23 @@ pub fn assert_tx_idx_equals<let MAX_KEY_LEN: u32>(
         );
     }
 }
+
+pub fn u32_to_u8(num: u32) -> [u8; 4] {
+    let mut out: [u8; 4] = [0; 4];
+    for i in 0..4 {
+        let shift: u32 = (24 - (i * 8));
+        out[i] = (num >> shift) as u8;
+    }
+
+    out
+}
+
+pub fn u64_to_u8(num: u64) -> [u8; 8] {
+    let mut out: [u8; 8] = [0; 8];
+    for i in 0..8 {
+        let shift: u32 = 56 - (i * 8);
+        out[i] = (num >> (shift as u64)) as u8;
+    }
+
+    out
+}