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python-bitshares/bitsharesapi/bitsharesnoderpc.py at master · trubee/python-bitshares · GitHub
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bitsharesapi
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bitsharesnoderpc.py
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bitsharesnoderpc.py
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import
re
from
grapheneapi
.
graphenewsrpc
import
GrapheneWebsocketRPC
from
grapheneapi
.
graphenehttprpc
import
GrapheneHTTPRPC
from
bitsharesbase
.
chains
import
known_chains
from
.
import
exceptions
import
logging
log
=
logging
.
getLogger
(
__name__
)
class
BitSharesNodeRPC
(
GrapheneWebsocketRPC
,
GrapheneHTTPRPC
):
def
__init__
(
self
,
urls
,
user
=
""
,
password
=
""
,
**
kwargs
):
if
isinstance
(
urls
,
str
):
self
.
_urls
=
re
.
split
(
r",|;"
,
urls
)
elif
isinstance
(
urls
, (
list
,
tuple
,
set
)):
self
.
_urls
=
urls
else
:
raise
exceptions
.
InvalidEndpointUrl
self
.
rpc
.
__init__
(
self
,
self
.
_urls
,
**
kwargs
)
self
.
chain_params
=
self
.
get_network
()
def
next
(
self
):
""" Iterate over to the next API node an reconnect
"""
self
.
rpc
.
next
()
@
property
def
rpc
(
self
):
first_url
=
self
.
_urls
[
0
]
if
first_url
[:
2
]
==
"ws"
:
# Websocket connection
return
GrapheneWebsocketRPC
else
:
# RPC/HTTP connection
return
GrapheneHTTPRPC
def
rpcexec
(
self
,
payload
):
""" Execute a call by sending the payload.
It makes use of the GrapheneRPC library.
In here, we mostly deal with BitShares specific error handling
:param json payload: Payload data
:raises ValueError: if the server does not respond in proper JSON
format
:raises RPCError: if the server returns an error
"""
try
:
# Forward call to GrapheneWebsocketRPC and catch+evaluate errors
return
self
.
rpc
.
rpcexec
(
self
,
payload
)
except
exceptions
.
RPCError
as
e
:
msg
=
exceptions
.
decodeRPCErrorMsg
(
e
).
strip
()
if
msg
==
"missing required active authority"
:
raise
exceptions
.
MissingRequiredActiveAuthority
elif
re
.
match
(
"current_account_itr == acnt_indx.indices().get<by_name>().end()"
,
msg
):
raise
exceptions
.
AccountCouldntBeFoundException
(
msg
)
elif
re
.
match
(
"Assert Exception: is_valid_name( name )"
,
msg
):
raise
exceptions
.
InvalidAccountNameException
(
msg
)
elif
re
.
match
(
"^no method with name.*"
,
msg
):
raise
exceptions
.
NoMethodWithName
(
msg
)
elif
msg
:
raise
exceptions
.
UnhandledRPCError
(
msg
)
else
:
raise
e
except
Exception
as
e
:
raise
e
def
get_account
(
self
,
name
,
**
kwargs
):
""" Get full account details from account name or id
:param str name: Account name or account id
"""
if
len
(
name
.
split
(
"."
))
==
3
:
return
self
.
get_objects
([
name
])[
0
]
else
:
return
self
.
get_account_by_name
(
name
,
**
kwargs
)
def
get_asset
(
self
,
name
,
**
kwargs
):
""" Get full asset from name of id
:param str name: Symbol name or asset id (e.g. 1.3.0)
"""
if
len
(
name
.
split
(
"."
))
==
3
:
return
self
.
get_objects
([
name
],
**
kwargs
)[
0
]
else
:
return
self
.
lookup_asset_symbols
([
name
],
**
kwargs
)[
0
]
def
get_object
(
self
,
o
,
**
kwargs
):
""" Get object with id ``o``
:param str o: Full object id
"""
return
self
.
get_objects
([
o
],
**
kwargs
)[
0
]
def
get_network
(
self
):
""" Identify the connected network. This call returns a
dictionary with keys chain_id, core_symbol and prefix
"""
props
=
self
.
get_chain_properties
()
chain_id
=
props
[
"chain_id"
]
for
k
,
v
in
known_chains
.
items
():
if
v
[
"chain_id"
]
==
chain_id
:
return
v
raise
Exception
(
"Connecting to unknown network!"
)
def
__getattr__
(
self
,
name
):
""" Map all methods to RPC calls and pass through the arguments.
It makes use of the GrapheneRPC library.
"""
return
self
.
rpc
.
__getattr__
(
self
,
name
)
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