[Supanode](https://supanode.xyz/)[Learn](https://supanode.xyz/learn)Find why a Solana program-account filter matches nothing

# Find why a Solana program-account filter matches nothing

Test owner, byte layout and filter encoding using one known account.

**On this page**[The filters are a conjunction](https://supanode.xyz/learn/getprogramaccounts-empty-result#the-filters-are-a-conjunction)[Work from one fixture](https://supanode.xyz/learn/getprogramaccounts-empty-result#work-from-one-fixture)[Add byte comparisons carefully](https://supanode.xyz/learn/getprogramaccounts-empty-result#add-byte-comparisons-carefully)[Use the narrowest suitable method](https://supanode.xyz/learn/getprogramaccounts-empty-result#use-the-narrowest-suitable-method)[Sources](https://supanode.xyz/learn/getprogramaccounts-empty-result#sources)

## The filters are a conjunction

`getProgramAccounts` lists accounts owned by one program and applies your filters. Every filter must pass. A correct owner plus a dataSize that describes another account variant is enough to produce an empty result. Program ownership is separate from a wallet authority stored inside account data.

## Work from one fixture

```
{"jsonrpc":"2.0","id":1,"method":"getProgramAccounts","params":["PROGRAM_ID",{"encoding":"base64","filters":[{"dataSize":165}]}]}
```

The 165-byte size is an illustrative fixed layout. Replace it with the actual size after inspecting a known matching account with getAccountInfo. Record its owner and raw data length. For variable-length or extension-bearing accounts, a single fixed size may exclude valid results.

## Add byte comparisons carefully

1.  Verify the program ID and cluster against the known account.
2.  Begin with a bounded, approved query; broad scans can be expensive or restricted.
3.  Derive memcmp offsets from the actual schema, including any discriminator or version prefix. Offsets count bytes.
4.  Encode the compared bytes using the filter's expected encoding. Comparing a textual base58 string as raw account bytes is not equivalent.

## Use the narrowest suitable method

For token holdings, getTokenAccountsByOwner can express the question directly. Token Program and Token-2022 have different owners and account layouts, so one token-program scan is not a complete inventory of both. Keep a fixture per program version and test it after parser changes. Read Supanode method weights and restrictions before scheduling repeated program-wide scans.

## Sources

-   [Solana: getProgramAccounts](https://solana.com/docs/rpc/http/getprogramaccounts)
-   [Solana: getAccountInfo](https://solana.com/docs/rpc/http/getaccountinfo)
-   [Solana: getTokenAccountsByOwner](https://solana.com/docs/rpc/http/gettokenaccountsbyowner)

## Continue reading

[Solana streaming guide](https://supanode.xyz/blog/solana-data-streaming-guide)[Solana product Docs](https://supanode.xyz/docs/solana/quickstart)[Learn library](https://supanode.xyz/learn)

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Source: https://supanode.xyz/learn/getprogramaccounts-empty-result