Add token api metadata getter (first without okota)

apps/cic-eth/cic_eth/admin/token.py

@@ -3,9 +3,15 @@ import logging
 
 # external imports
 import celery
+from chainlib.connection import RPCConnection
+from chainlib.chain import ChainSpec
+from cic_eth_registry.erc20 import ERC20Token
+from hexathon import add_0x
 
 # local imports
-from cic_eth.task import BaseTask
+from cic_eth.task import (
+        BaseTask,
+        )
 
 celery_app = celery.current_app
 logg = logging.getLogger()
@@ -19,3 +25,23 @@ def default_token(self):
         'name': self.default_token_name,
         'decimals': self.default_token_decimals,
         }
+
+
+@celery_app.task(bind=True, base=BaseTask)
+def token(self, tokens, chain_spec_dict):
+    chain_spec = ChainSpec.from_dict(chain_spec_dict)
+    rpc = RPCConnection.connect(chain_spec, 'default')
+
+    r = []
+    for token in tokens:
+        token_chain_object = ERC20Token(chain_spec, rpc, add_0x(token['address']))
+        token_chain_object.load(rpc)
+        token_data = {
+            'decimals': token_chain_object.decimals,
+            'name': token_chain_object.name,
+            'symbol': token_chain_object.symbol,
+            'address': token_chain_object.address,
+                }
+        r.append(token_data)
+
+    return r

apps/cic-eth/cic_eth/api/api_task.py

@@ -35,6 +35,36 @@ class Api(ApiBase):
         return s_token.apply_async()
 
 
+    def token(self, token_symbol):
+        return self.tokens([token_symbol])
+
+
+    def tokens(self, token_symbols):
+        chain_spec_dict = self.chain_spec.asdict()
+        s_token_resolve = celery.signature(
+                'cic_eth.eth.erc20.resolve_tokens_by_symbol',
+                [
+                    token_symbols,
+                    chain_spec_dict,
+                    ],
+                queue=self.queue,
+                )
+
+        s_token = celery.signature(
+                'cic_eth.admin.token.token',
+                [
+                    chain_spec_dict,
+                    ],
+                queue=self.queue,
+                )
+
+        s_token_resolve.link(s_token)
+        if self.callback_param != None:
+            s_token.link(self.callback_success)
+
+        return s_token_resolve.apply_async()
+
+
 #    def convert_transfer(self, from_address, to_address, target_return, minimum_return, from_token_symbol, to_token_symbol):
 #        """Executes a chain of celery tasks that performs conversion between two ERC20 tokens, and transfers to a specified receipient after convert has completed.
 #

apps/cic-eth/tests/task/api/test_app_noncritical.py

@@ -17,3 +17,31 @@ def test_default_token(
     t = api.default_token()
     r = t.get_leaf()
     assert r['address'] == foo_token
+
+
+def test_tokens(
+        default_chain_spec,
+        foo_token,
+        bar_token,
+        token_registry,
+        register_tokens,
+        register_lookups,
+        cic_registry,
+        init_database,
+        init_celery_tasks,
+        custodial_roles,
+        celery_worker,
+        ):
+
+    api = Api(str(default_chain_spec), queue=None)     
+
+    t = api.token('FOO')
+    r = t.get_leaf()
+    assert len(r) == 1
+    assert r[0]['address'] == foo_token
+
+    t = api.tokens(['BAR', 'FOO'])
+    r = t.get_leaf()
+    assert len(r) == 2
+    assert r[1]['address'] == foo_token
+    assert r[0]['address'] == bar_token