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README.md

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----
-license: cc-by-nc-4.0
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+---
+license: cc-by-nc-4.0
+tags:
+- ethereum
+- evm
+- blockchain
+- cryptocurrency
+- crypto
+- onchain-data
+- tabular
+- timeseries
+- datasets
+- pandas
+- polars
+- duckdb
+pretty_name: BlockDB Raw Function Results - Sample
+size_categories:
+- 10M<n<100M
+---
+
+![BlockDB Banner](./assets/banner.jpg)
+
+## Sample Notice
+
+This dataset contains **a small sample** of the full BlockDB Raw Function Results dataset.  
+It is provided **for evaluation, research, and interoperability testing only**.
+
+If you need full historical coverage, real-time streaming, or end-of-day (EOD) exports
+please contact us directly:
+
+📧 **support@blockdb.io**  
+🌐 https://www.blockdb.io  
+
+
+## Dataset Overview
+On-chain contract function call return values versioned by block. Each row records the raw output of a deterministic view function call at a specific block height, enabling time-travel queries over any contract's on-chain state. Uses a 26-byte contract_id (consistent with the contracts dataset) to correctly handle metamorphic contracts.
+
+
+## Chains and Coverage
+ETH, BSC, Base, Arbitrum, Unichain, Avalanche, Polygon, Celo, Linea, Optimism (others on request).
+Full history from chain genesis; reorg-aware real-time ingestion and updates.
+
+
+## Schema
+List of columns exactly as delivered:
+
+	•	contract_id BYTEA – Part of PK; 20 bytes (address) + 4 bytes (creation block BE) + 2 bytes (tx_index BE); links to b0121_contracts_v1
+	•	block_number BIGINT – Part of PK; block at which the value was read
+	•	block_time TIMESTAMPTZ – UTC timestamp when the block was mined
+	•	call_data BYTEA – Part of PK; raw call data used to invoke the function
+	•	signature_hash BYTEA – 4-byte selector (keccak256(signature)[0..3])
+	•	result BYTEA – Raw return data from the function call (null if reverted)
+	•	timestamp_utc TIMESTAMPTZ – UTC timestamp when the function call result was recorded
+	•	_tracing_id BYTEA – Deterministic tracing ID of this function result record
+	•	_created_at TIMESTAMPTZ – Record creation timestamp
+	•	_updated_at TIMESTAMPTZ – Record last update timestamp
+
+
+### Notes
+	•	Primary key: (contract_id, block_number, call_data) enables point-in-time lookups per contract per call.
+	•	result is raw ABI-encoded bytes; decode using the ABI for the matching signature_hash.
+	•	NULL result indicates a reverted call at that block.
+	•	Use encode(contract_id, 'hex') to convert binary values to hex.
+
+
+## Lineage
+Each function result record includes a deterministic _tracing_id, providing:
+
+	•	Provenance tracking from raw RPC calls to versioned contract state snapshots
+	•	Reproducible analytics and signal extraction
+	•	Cross-system consistency checks (RPC vs. indexers vs. internal warehouses)
+
+
+## Common Use Cases
+	•	Historical state reconstruction and time-travel queries
+	•	Token metadata and balance lookups at specific blocks
+	•	Contract configuration and parameter tracking over time
+	•	Price oracle and external data feed analysis
+	•	Governance proposal and voting state tracking
+
+
+## Quality
+	•	Verifiable lineage: deterministic cryptographic hashes per row
+	•	Reorg-aware ingestion: continuity and consistency across forks
+	•	Complete historical coverage: from chain genesis to present

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