Removed old check on pre EIP-155 transactions

- removed special sign APDU chunking from Python client

Author: apaillier-ledger

client/src/ledger_app_clients/ethereum/command_builder.py

@@ -267,21 +267,11 @@ def sign(self, bip32_path: str, rlp_data: bytes, vrs: list) -> list[bytes]:
         payload += rlp_data
         p1 = P1Type.SIGN_FIRST_CHUNK
         while len(payload) > 0:
-            chunk_size = 0xff
-
-            # TODO: Fix the app & remove this, issue #409
-            if len(vrs) == 3:
-                if len(payload) > chunk_size:
-                    import rlp
-                    diff = len(rlp.encode(vrs)) - (len(payload) - chunk_size)
-                    if diff > 0:
-                        chunk_size -= diff
-
             apdus.append(self._serialize(InsType.SIGN,
                                          p1,
                                          0x00,
-                                         payload[:chunk_size]))
-            payload = payload[chunk_size:]
+                                         payload[:0xff]))
+            payload = payload[0xff:]
             p1 = P1Type.SIGN_SUBSQT_CHUNK
         return apdus
 

src/ethUstream.c

@@ -530,19 +530,6 @@ static parserStatus_e processTxInternal(txContext_t *context) {
             PRINTF("parsing is done\n");
             return USTREAM_FINISHED;
         }
-        // Old style transaction (pre EIP-155). Transactions could just skip `v,r,s` so we needed to
-        // cut parsing here. commandLength == 0 could happen in two cases :
-        // 1. We are in an old style transaction : just return `USTREAM_FINISHED`.
-        // 2. We are at the end of an APDU in a multi-apdu process. This would make us return
-        // `USTREAM_FINISHED` preemptively. Case number 2 should NOT happen as it is up to
-        // `ledgerjs` to correctly decrease the size of the APDU (`commandLength`) so that this
-        // situation doesn't happen.
-        if ((context->txType == LEGACY && context->currentField == LEGACY_RLP_V) &&
-            (context->commandLength == 0)) {
-            context->content->vLength = 0;
-            PRINTF("finished\n");
-            return USTREAM_FINISHED;
-        }
         if (context->commandLength == 0) {
             PRINTF("Command length done\n");
             return USTREAM_PROCESSING;