Add remaining health checks and shutdown on critical errors

apps/cic-eth/cic_eth/eth/account.py

@@ -4,10 +4,10 @@ import logging
 # external imports
 import celery
 from erc20_single_shot_faucet import SingleShotFaucet as Faucet
-from chainlib.eth.constant import ZERO_ADDRESS
 from hexathon import (
         strip_0x,
         )
+from chainlib.eth.constant import ZERO_ADDRESS
 from chainlib.connection import RPCConnection
 from chainlib.eth.sign import (
         new_account,
@@ -19,6 +19,7 @@ from chainlib.eth.tx import (
         unpack,
         )
 from chainlib.chain import ChainSpec
+from chainlib.error import JSONRPCException
 from eth_accounts_index import AccountRegistry
 from sarafu_faucet import MinterFaucet as Faucet
 from chainqueue.db.models.tx import TxCache
@@ -70,11 +71,18 @@ def create(self, password, chain_spec_dict):
     a = None
     conn = RPCConnection.connect(chain_spec, 'signer')
     o = new_account()
-    a = conn.do(o)
+    try:
+        a = conn.do(o)
+    except ConnectionError as e:
+        raise SignerError(e)
+    except FileNotFoundError as e:
+        raise SignerError(e)
     conn.disconnect()
 
+    # TODO: It seems infeasible that a can be None in any case, verify
     if a == None:
         raise SignerError('create account')
+        
     logg.debug('created account {}'.format(a))
 
     # Initialize nonce provider record for account
@@ -219,21 +227,22 @@ def have(self, account, chain_spec_dict):
     """
     chain_spec = ChainSpec.from_dict(chain_spec_dict)
     o = sign_message(account, '0x2a')
-    try:
-        conn = RPCConnection.connect(chain_spec, 'signer')
-    except Exception as e:
-        logg.debug('cannot sign with {}: {}'.format(account, e))
-        return None
+    conn = RPCConnection.connect(chain_spec, 'signer')
 
     try:
         conn.do(o)
-        conn.disconnect()
-        return account
-    except Exception as e:
+    except ConnectionError as e:
+        raise SignerError(e)
+    except FileNotFoundError as e:
+        raise SignerError(e)
+    except JSONRPCException as e:
         logg.debug('cannot sign with {}: {}'.format(account, e))
         conn.disconnect()
         return None
    
+    conn.disconnect()
+    return account
+
 
 @celery_app.task(bind=True, base=CriticalSQLAlchemyTask)
 def set_role(self, tag, address, chain_spec_dict):

apps/cic-eth/cic_eth/eth/erc20.py

@@ -108,7 +108,13 @@ def transfer(self, tokens, holder_address, receiver_address, value, chain_spec_d
     nonce_oracle = CustodialTaskNonceOracle(holder_address, self.request.root_id, session=session)
     gas_oracle = self.create_gas_oracle(rpc, MaxGasOracle.gas)
     c = ERC20(chain_spec, signer=rpc_signer, gas_oracle=gas_oracle, nonce_oracle=nonce_oracle)
-    (tx_hash_hex, tx_signed_raw_hex) = c.transfer(t['address'], holder_address, receiver_address, value, tx_format=TxFormat.RLP_SIGNED)
+    try:
+        (tx_hash_hex, tx_signed_raw_hex) = c.transfer(t['address'], holder_address, receiver_address, value, tx_format=TxFormat.RLP_SIGNED)
+    except FileNotFoundError as e:
+        raise SignerError(e)
+    except ConnectionError as e:
+        raise SignerError(e)
+    
 
     rpc_signer.disconnect()
     rpc.disconnect()
@@ -171,7 +177,12 @@ def approve(self, tokens, holder_address, spender_address, value, chain_spec_dic
     nonce_oracle = CustodialTaskNonceOracle(holder_address, self.request.root_id, session=session)
     gas_oracle = self.create_gas_oracle(rpc, MaxGasOracle.gas)
     c = ERC20(chain_spec, signer=rpc_signer, gas_oracle=gas_oracle, nonce_oracle=nonce_oracle)
-    (tx_hash_hex, tx_signed_raw_hex) = c.approve(t['address'], holder_address, spender_address, value, tx_format=TxFormat.RLP_SIGNED)
+    try:
+        (tx_hash_hex, tx_signed_raw_hex) = c.approve(t['address'], holder_address, spender_address, value, tx_format=TxFormat.RLP_SIGNED)
+    except FileNotFoundError as e:
+        raise SignerError(e)
+    except ConnectionError as e:
+        raise SignerError(e)
 
     rpc_signer.disconnect()
     rpc.disconnect()

apps/cic-eth/cic_eth/eth/gas.py

@@ -328,7 +328,12 @@ def refill_gas(self, recipient_address, chain_spec_dict):
 
     # build and add transaction
     logg.debug('tx send gas amount {} from provider {} to {}'.format(refill_amount, gas_provider, recipient_address))
-    (tx_hash_hex, tx_signed_raw_hex) = c.create(gas_provider, recipient_address, refill_amount, tx_format=TxFormat.RLP_SIGNED)
+    try:
+        (tx_hash_hex, tx_signed_raw_hex) = c.create(gas_provider, recipient_address, refill_amount, tx_format=TxFormat.RLP_SIGNED)
+    except ConnectionError as e:
+        raise SignerError(e)
+    except FileNotFoundError as e:
+        raise SignerError(e)
     logg.debug('adding queue refill gas tx {}'.format(tx_hash_hex))
     cache_task = 'cic_eth.eth.gas.cache_gas_data'
     register_tx(tx_hash_hex, tx_signed_raw_hex, chain_spec, queue, cache_task=cache_task, session=session)
@@ -404,7 +409,12 @@ def resend_with_higher_gas(self, txold_hash_hex, chain_spec_dict, gas=None, defa
     c = TxFactory(chain_spec, signer=rpc_signer, gas_oracle=gas_oracle)
     logg.debug('change gas price from old {} to new {} for tx {}'.format(tx['gasPrice'], new_gas_price, tx))
     tx['gasPrice'] = new_gas_price
-    (tx_hash_hex, tx_signed_raw_hex) = c.build_raw(tx)
+    try:
+        (tx_hash_hex, tx_signed_raw_hex) = c.build_raw(tx)
+    except ConnectionError as e:
+        raise SignerError(e)
+    except FileNotFoundError as e:
+        raise SignerError(e)
     queue_create(
         chain_spec,
         tx['nonce'],