Add send cli tool, make token resolver pluggable

chaind/eth/token/__init__.py

@@ -0,0 +1 @@
+from .base import *

chaind/eth/token/base.py

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+# standard imports
+import logging
+
+# external imports
+from funga.eth.transaction import EIP155Transaction
+from hexathon import strip_0x
+
+logg = logging.getLogger(__name__)
+
+class BaseTokenResolver:
+
+    def __init__(self, chain_spec, sender, signer, gas_oracle, nonce_oracle):
+        self.chain_spec = chain_spec
+        self.chain_id = chain_spec.chain_id()
+        self.signer = signer
+        self.sender = sender
+        self.gas_oracle = gas_oracle
+        self.nonce_oracle = nonce_oracle
+        self.factory = None
+        self.gas_limit_start = None
+        self.gas_price_start = None
+
+    
+    def reset(self):
+        gas_data = self.gas_oracle.get_gas()
+        self.gas_price_start = gas_data[0]
+        self.gas_limit_start = gas_data[1]
+
+
+    def get_values(self, gas_value, value, executable_address=None):
+        if executable_address == None:
+            return (value, 0)
+
+        try:
+            value = int(value)
+        except ValueError:
+            value = int(strip_0x(value), 16)
+
+        try:
+            gas_value = int(gas_value)
+        except ValueError:
+            gas_value = int(strip_0x(gas_value), 16)
+
+        nonce = self.nonce_oracle.next_nonce()
+
+        return (gas_value, value, nonce,)
+
+
+    def sign(self, tx):
+        tx_o = EIP155Transaction(tx, tx['nonce'], self.chain_id)
+        tx_bytes = self.signer.sign_transaction_to_wire(tx_o)
+        return tx_bytes

chaind/eth/token/erc20.py

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+# external imports
+from eth_erc20 import ERC20
+from chainlib.eth.tx import TxFormat
+
+# local imports
+from chaind.eth.token import BaseTokenResolver
+
+
+class TokenResolver(BaseTokenResolver):
+
+    def __init__(self, chain_spec, sender, signer, gas_oracle, nonce_oracle):
+        super(TokenResolver, self).__init__(chain_spec, sender, signer, gas_oracle, nonce_oracle)
+        self.factory = ERC20(self.chain_spec, signer=self.signer, gas_oracle=self.gas_oracle, nonce_oracle=self.nonce_oracle)
+
+
+    def create(self, recipient, gas_value, data=None, token_value=0, executable_address=None, passphrase=None):
+
+        if executable_address == None:
+            raise ValueError('executable address required')
+
+        (gas_value, token_value, nonce) = self.get_values(gas_value, token_value, executable_address=executable_address)
+
+        tx = self.factory.transfer(executable_address, self.sender, recipient, token_value, tx_format=TxFormat.DICT)
+        tx['value'] = gas_value
+
+        return tx

chaind/eth/token/gas.py

@@ -0,0 +1,30 @@
+# external imports
+from chainlib.eth.gas import Gas
+from hexathon import strip_0x
+
+# local imports
+from chaind.eth.token import BaseTokenResolver
+
+
+class GasTokenResolver(BaseTokenResolver):
+
+    def __init__(self, chain_spec, sender, signer, gas_oracle, nonce_oracle):
+        super(GasTokenResolver, self).__init__(chain_spec, sender, signer, gas_oracle, nonce_oracle)
+        self.factory = Gas(self.chain_spec, signer=self.signer, gas_oracle=self.gas_oracle, nonce_oracle=self.nonce_oracle)
+
+
+    def create(self, recipient, gas_value, data=None, token_value=0, executable_address=None, passphrase=None):
+
+        (gas_value, token_value, nonce) = self.get_values(gas_value, token_value, executable_address=executable_address)
+
+        tx = {
+            'from': self.sender,
+            'to': recipient,
+            'value': gas_value,
+            'data': data,
+            'nonce': nonce,
+            'gasPrice': self.gas_price_start,
+            'gas': self.gas_limit_start,
+                }
+
+        return tx

chaind/eth/token/process.py

@@ -0,0 +1,98 @@
+# standard imports
+import logging
+
+# external imports
+from chaind.error import TxSourceError
+from chainlib.eth.address import is_checksum_address
+from chainlib.eth.tx import unpack
+from chainlib.eth.gas import Gas
+from hexathon import (
+        add_0x,
+        strip_0x,
+        )
+from funga.eth.transaction import EIP155Transaction
+#from eth_erc20 import ERC20
+
+logg = logging.getLogger(__name__)
+
+
+class Processor:
+
+    def __init__(self, resolver, source):
+        self.resolver = resolver
+        self.source = source
+        self.processor = []
+        
+
+    def add_processor(self, processor):
+        self.processor.append(processor)
+
+
+    def load(self, process=True):
+        for processor in self.processor:
+            self.content = processor.load(self.source)
+        if self.content != None:
+            if process:
+                try:
+                    self.process()
+                except Exception as e:
+                    raise TxSourceError('invalid source contents: {}'.format(str(e)))
+            return self.content
+        raise TxSourceError('unparseable source')
+       
+    
+    # 0: recipient
+    # 1: amount
+    # 2: token identifier (optional, when not specified network gas token will be used)
+    # 3: gas amount (optional)
+    def process(self):
+        txs = []
+        for i, r in enumerate(self.content):
+            logg.debug('processing {}'.format(r))
+            if not is_checksum_address(r[0]):
+                raise ValueError('invalid checksum address {} in record {}'.format(r[0], i))
+            self.content[i][0] = add_0x(r[0])
+            try:
+                self.content[i][1] = int(r[1])
+            except ValueError:
+                self.content[i][1] = int(strip_0x(r[1]), 16)
+            native_token_value = 0
+
+            if len(self.content[i]) == 3:
+                self.content[i].append(native_token_value)
+
+
+    def __iter__(self):
+        self.resolver.reset()
+        self.cursor = 0
+        return self
+
+
+    def __next__(self): 
+        if self.cursor == len(self.content):
+            raise StopIteration()
+
+        r = self.content[self.cursor]
+
+        value = r[1]
+        gas_value = 0
+        try:
+            gas_value = r[3]
+        except IndexError:
+            pass
+        logg.debug('gasvalue {}'.format(gas_value))
+        data = '0x'
+
+        tx = self.resolver.create(r[0], gas_value, data=data, token_value=value, executable_address=r[2])
+        v =  self.resolver.sign(tx)
+
+        self.cursor += 1
+
+        return v
+
+
+    def __str__(self):
+        names = []
+        for s in self.processor:
+            names.append(str(s))
+        return ','.join(names)