helius

Use the Helius DAS API getAssetsByOwner method with the wallet address, setting showFungible to false to exclude tokens. Filter results by interface type to separate standard NFTs from compressed NFTs, and paginate with page or cursor parameters for large wallets.

Call getPriorityFeeEstimate with your transaction's account keys and a priority level like HIGH. Add the returned microLamports value to a setComputeUnitPrice instruction prepended to your transaction before signing and sending.

Enhanced webhooks deliver parsed, human-readable transaction data filtered by types like SWAP or NFT_SALE. Raw webhooks stream unfiltered transaction data with lower latency, suitable for custom indexing pipelines.

Yes, Helius provides DAS API methods like getAssetProof for compressed NFT merkle proofs, plus a dedicated ZK compression namespace for querying compressed accounts, token balances, and validity proofs.

The 429 error means you exceeded your plan's request rate or credit allocation. Implement exponential backoff retries, batch requests with methods like getAssetBatch, or upgrade your plan in the Helius dashboard.

Create a Helius webhook with the target address and desired transaction types, pointing to your HTTPS endpoint. Alternatively, use WebSocket subscriptions like accountSubscribe or logsSubscribe for direct streaming connections.