Expand token symbol and decimals in tx listings

apps/cic-eth/cic_eth/ext/tx.py

@@ -14,9 +14,11 @@ from chainlib.eth.tx import (
         )
 from chainlib.eth.block import block_by_number
 from chainlib.eth.contract import abi_decode_single
+from chainlib.eth.constant import ZERO_ADDRESS
 from hexathon import strip_0x
 from cic_eth_registry import CICRegistry
 from cic_eth_registry.erc20 import ERC20Token
+from cic_eth_registry.error import UnknownContractError
 from chainqueue.db.models.otx import Otx
 from chainqueue.db.enum import StatusEnum
 from chainqueue.sql.query import get_tx_cache
@@ -114,9 +116,6 @@ def list_tx_by_bloom(self, bloomspec, address, chain_spec_dict):
 
                         # TODO: pass through registry to validate declarator entry of token
                         #token = registry.by_address(tx['to'], sender_address=self.call_address)
-                        token = ERC20Token(chain_spec, rpc, tx['to'])
-                        token_symbol = token.symbol
-                        token_decimals = token.decimals
                         times = tx_times(tx['hash'], chain_spec)
                         tx_r = {
                             'hash': tx['hash'],
@@ -126,12 +125,6 @@ def list_tx_by_bloom(self, bloomspec, address, chain_spec_dict):
                             'destination_value': tx_token_value,
                             'source_token': tx['to'],
                             'destination_token': tx['to'],
-                            'source_token_symbol': token_symbol,
-                            'destination_token_symbol': token_symbol,
-                            'source_token_decimals': token_decimals,
-                            'destination_token_decimals': token_decimals,
-                            'source_token_chain': chain_str,
-                            'destination_token_chain': chain_str,
                             'nonce': tx['nonce'],
                                 }
                         if times['queue'] != None:
@@ -146,8 +139,8 @@ def list_tx_by_bloom(self, bloomspec, address, chain_spec_dict):
 # TODO: Surely it must be possible to optimize this
 # TODO: DRY this with callback filter in cic_eth/runnable/manager
 # TODO: Remove redundant fields from end representation (timestamp, tx_hash)
-@celery_app.task()
-def tx_collate(tx_batches, chain_spec_dict, offset, limit, newest_first=True):
+@celery_app.task(bind=True, base=BaseTask)
+def tx_collate(self, tx_batches, chain_spec_dict, offset, limit, newest_first=True, verify_contracts=True):
     """Merges transaction data from multiple sources and sorts them in chronological order.
 
     :param tx_batches: Transaction data inputs
@@ -196,6 +189,32 @@ def tx_collate(tx_batches, chain_spec_dict, offset, limit, newest_first=True):
     if newest_first:
         ks.reverse()
     for k in ks:
-        txs.append(txs_by_block[k])
+        tx = txs_by_block[k]
+        if verify_contracts:
+            try:
+                tx = verify_and_expand(tx, chain_spec, sender_address=BaseTask.call_address)
+            except UnknownContractError:
+                logg.error('verify failed on tx {}, skipping'.format(tx['hash']))
+                continue
+        txs.append(tx)
 
     return txs
+
+
+def verify_and_expand(tx, chain_spec, sender_address=ZERO_ADDRESS):
+    rpc = RPCConnection.connect(chain_spec, 'default')
+    registry = CICRegistry(chain_spec, rpc)
+
+    if tx.get('source_token_symbol') == None and tx['source_token'] != ZERO_ADDRESS:
+        r = registry.by_address(tx['source_token'], sender_address=sender_address)
+        token = ERC20Token(chain_spec, rpc, tx['source_token'])
+        tx['source_token_symbol'] = token.symbol
+        tx['source_token_decimals'] = token.decimals
+
+    if tx.get('destination_token_symbol') == None and tx['destination_token'] != ZERO_ADDRESS:
+        r = registry.by_address(tx['destination_token'], sender_address=sender_address)
+        token = ERC20Token(chain_spec, rpc, tx['destination_token'])
+        tx['destination_token_symbol'] = token.symbol
+        tx['destination_token_decimals'] = token.decimals
+
+    return tx

apps/cic-eth/cic_eth/version.py

@@ -9,8 +9,8 @@ import semver
 version = (
         0,
         12,
-        0,
-        'alpha.3',
+        1,
+        'alpha.2',
         )
 
 version_object = semver.VersionInfo(