fix value

fendermint/eth/api/src/conv/from_eth.rs

@@ -68,7 +68,7 @@ mod tests {
 
     #[test]
     fn test_legacy_transaction() {
-        let raw_tx = "f86c098504a817c800825208943535353535353535353535353535353535353535880de0b6b3a76400008025a028ef61340bd939bc2195fe537567866003e1a15d3c71ff63e1590620aa636276a067cbe9d8997f761aecb703304b3800ccf555c9f3dc64214b297fb1966a3b6d83";
+        let raw_tx = "f8ac821dac850df8475800830186a09465292eeadf1426cd2df1c4793a3d7519f253913b80b844a9059cbb000000000000000000000000cd50511c4e355f2bc3c084d854253cc17b2230bf00000000000000000000000000000000000000000000148a616ad7f95aa0000025a0a4f3a70a01cfb3969c4a12510ebccd7d08250a4d34181123bebae3f865392643a063116147193f2badc611fa20dfa1c339bca299f50e470353ee4f676bc236479d";
         let raw_tx = hex::decode(raw_tx).unwrap();
 
         let rlp = rlp::Rlp::new(raw_tx.as_ref());

fendermint/vm/message/src/conv/from_eth.rs

@@ -50,17 +50,13 @@ pub fn fvm_message_from_legacy(tx: &TransactionRequest) -> anyhow::Result<Messag
     let params = RawBytes::serialize(BytesSer(&calldata))?;
 
     let gas_price = tx.gas_price.unwrap_or_default();
-    let value = if let Some(v) = tx.value {
-        to_fvm_tokens(&v)
-    } else {
-        TokenAmount::from_atto(-1)
-    };
+
     let msg = Message {
         version: 0,
         from,
         to,
         sequence: tx.nonce.unwrap_or_default().as_u64(),
-        value,
+        value: to_fvm_tokens(&tx.value.unwrap_or_default()),
         method_num,
         params,
         gas_limit: tx

fendermint/vm/message/src/conv/from_fvm.rs

@@ -106,9 +106,8 @@ pub fn to_eth_legacy_request(
 
     // NOTE: It's impossible to tell if the original Ethereum transaction sent None or Some(0).
     // The ethers deployer sends None, so let's assume that's the useful behavour to match.
-    // TODO: review, if value is None, it's set to -1 for intermediate conversion
-    // TODO: or we just assume Some(0) will not occur in fendermint.
-    if !value.is_negative() {
+    // Luckily the RLP encoding at some point seems to resolve them to the same thing.
+    if !value.is_zero() {
         tx.value = Some(to_eth_tokens(value)?);
     }