From f12392103e13ef11e3b86813fa1fc7b53352477b Mon Sep 17 00:00:00 2001
From: Jacob <61052369+jacob-chia@users.noreply.github.com>
Date: Thu, 1 Aug 2024 16:40:30 +0800
Subject: [PATCH] Support arbitrum (#529)

---
 src/evm/onchain/endpoints.rs       | 16 +++++++++++++++-
 src/evm/tokens/weth_transformer.rs |  5 +++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/evm/onchain/endpoints.rs b/src/evm/onchain/endpoints.rs
index 0a6331f60..27608d3ca 100644
--- a/src/evm/onchain/endpoints.rs
+++ b/src/evm/onchain/endpoints.rs
@@ -386,6 +386,7 @@ impl ChainConfig for OnChainConfig {
             "eth" => return pegged_token.get("WETH").unwrap().to_string(),
             "bsc" => return pegged_token.get("WBNB").unwrap().to_string(),
             "polygon" => return pegged_token.get("WMATIC").unwrap().to_string(),
+            "arbitrum" => return pegged_token.get("WETH").unwrap().to_string(),
             "local" => return pegged_token.get("ZERO").unwrap().to_string(),
             // "mumbai" => panic!("Not supported"),
             _ => {
@@ -432,6 +433,18 @@ impl ChainConfig for OnChainConfig {
             .iter()
             .map(|(k, v)| (k.to_string(), v.to_string()))
             .collect(),
+            "arbitrum" => [
+                ("WETH", "0x82af49447d8a07e3bd95bd0d56f35241523fbab1"),
+                ("WBTC", "0x2f2a2543b76a4166549f7aab2e75bef0aefc5b0f"),
+                ("USDT", "0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9"),
+                ("USDC.e", "0xff970a61a04b1ca14834a43f5de4533ebddb5cc8"),
+                ("USDC", "0xaf88d065e77c8cc2239327c5edb3a432268e5831"),
+                ("DAI", "0xda10009cbd5d07dd0cecc66161fc93d7c9000da1"),
+                ("crvUSD", "0x498bf2b1e120fed3ad3d42ea2165e9b73f99c1e5"),
+            ]
+            .iter()
+            .map(|(k, v)| (k.to_string(), v.to_string()))
+            .collect(),
             "local" => [("ZERO", "0x0000000000000000000000000000000000000000")]
                 .iter()
                 .map(|(k, v)| (k.to_string(), v.to_string()))
@@ -1107,10 +1120,11 @@ impl OnChainConfig {
         }
         info!("fetching pairs for {token}");
         let url = if is_pegged {
-            format!("https://pairs.infra.fuzz.land/single_pair/{network}/{token}/{weth}")
+            format!("https://pairs-all.infra.fuzz.land/single_pair/{network}/{token}/{weth}")
         } else {
             format!("https://pairs-all.infra.fuzz.land/pairs/{network}/{token}")
         };
+        // info!("{url}");
         let resp: Value = reqwest::blocking::get(url).unwrap().json().unwrap();
         let mut pairs: Vec<PairData> = Vec::new();
         if let Some(resp_pairs) = resp.as_array() {
diff --git a/src/evm/tokens/weth_transformer.rs b/src/evm/tokens/weth_transformer.rs
index 5c2c38717..2a4471414 100644
--- a/src/evm/tokens/weth_transformer.rs
+++ b/src/evm/tokens/weth_transformer.rs
@@ -26,8 +26,9 @@ pub struct WethContext {
 
 pub fn withdraw_bytes(amount: EVMU256) -> Bytes {
     let mut ret = Vec::new();
-    ret.extend_from_slice(&[0xa9, 0x05, 0x9c, 0xbb]); // transfer to null
-    ret.extend_from_slice(&[0x00; 32]); // padding
+    ret.extend_from_slice(&[0xa9, 0x05, 0x9c, 0xbb]); // transfer to a dead address
+    ret.extend_from_slice(&[0x00; 30]); // 0x000...dead
+    ret.extend_from_slice(&[0xde, 0xad]);
     ret.extend_from_slice(&amount.to_be_bytes::<32>()); // amount
     Bytes::from(ret)
 }