Problem with using Solana Mainnet, might be about mapping key

[Steinadler177]

Problem Description

I'm trying to read all price from solana by each time I call the function. When I set solana_network with devnet, it was working perfect. However, when I try to use mainet, testnet, or pythnet, it can't work anymore.

Calling method

solana_network="mainnet" 
use_program = True

async def SolanaPythClientPriceFunction():
    async with PythClient(
        first_mapping_account_key=get_key(solana_network, "mapping"),
        program_key=get_key(solana_network, "program") if use_program else None,
    ) as c:
        await c.refresh_all_prices()

Debug Console Output

.....venv\Lib\site-packages\pythclient\pythclient.py", line 185, in _refresh_mapping_accounts
    raise exceptions.MissingAccountException(f"need account {key} but missing in getProgramAccount response")
pythclient.exceptions.MissingAccountException: need account AHtgzX45WTKfkPG53L6WYhGEXwQkN1BVknET3sVsLL8J but missing in getProgramAccount response

I checked the variables with debugger.

pyth-client-py/pythclient/pythclient.py

Lines 174 to 193 in bdd32b4

	async def _refresh_mapping_accounts(self, *, account_json: Optional[Dict[str, Any]] = None, slot: Optional[int] = None) -> List[PythMappingAccount]:
	key = self._first_mapping_account_key
	existing_mappings = dict((mapping.key, mapping) for mapping in self._mapping_accounts) if self._mapping_accounts else {}
	mapping_accounts: List[PythMappingAccount] = []
	while key:
	m = existing_mappings.get(key) or PythMappingAccount(key, self.solana)
	if account_json is not None:
	m_data = account_json.get(str(key))
	if m_data is None:
	raise exceptions.MissingAccountException(f"need account {key} but missing in getProgramAccount response")
	assert slot
	m.update_with_rpc_response(slot, m_data)
	else:
	await m.update()
	mapping_accounts.append(m)
	key = m.next_account_key
	self._mapping_accounts = mapping_accounts
	return self._mapping_accounts

Until L180, everything works fine. Both key was correctly assigned values. But then, at L183,
m_data = account_json.get(AHtgzX45WTKfkPG53L6WYhGEXwQkN1BVknET3sVsLL8J )
it reads empty data.

Is this an error with mapping key? ( I checked with Pyth Network Website, the key is as same as here) Or with the method that I calling it?

[guibescos]

Hi thanks for reaching out. get_key allows you to get the right mapping address for each network.
AHtgzX45WTKfkPG53L6WYhGEXwQkN1BVknET3sVsLL8J is the right address for mainnet.

I think perhaps the issue is the getProgramAccount response being empty? Some RPC nodes don't allow you to call this method. Can you check that the return value of getProgramAccount looks ok?

[Steinadler177]

Hi thanks for reaching out. get_key allows you to get the right mapping address for each network. AHtgzX45WTKfkPG53L6WYhGEXwQkN1BVknET3sVsLL8J is the right address for mainnet.

I think perhaps the issue is the getProgramAccount response being empty? Some RPC nodes don't allow you to call this method. Can you check that the return value of getProgramAccount looks ok?

Thank you for helping! I put a breakpoint for solana.py L267 but it didn't reach there before broken...

for pythclient.py L179:
`mapping_accounts: List[PythMappingAccount] = []`
It is empty.
I'm stupid, it should be empty

I put a breapoint for pythclient.py L101, current variables looks like this:

Where exactly shall I look into?

[guibescos]

I think probably the best way to proceed here is if you can provide a reproducible code example that causes the error, for example as a Github repository.

[Steinadler177]

I think probably the best way to proceed here is if you can provide a reproducible code example that causes the error, for example as a Github repository.

Sorry it took me some time to build a clean and simple repo. Here is it:

https://github.com/Steinadler177/PythClientTest

[bonlime]

The code hardcodes to using DEVNET solana http endpoint. you need to provide a correct mainnet/testnet endpoint to get into about mainnet accounts, this would solve the issue