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README.md
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pretty_name: BlockDB Liquidity Pools Fee Terms - Sample
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- 10M<n<100M
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---
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It is provided **for evaluation, research, and interoperability testing only**.
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please contact us directly:
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📧 **support@blockdb.io**
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🌐 https://www.blockdb.io
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## Dataset Overview
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Versioned fee terms per liquidity pool. Each row represents a fee configuration change event, tracking total fee, user/LP fee, protocol fee, and extra fee fractions. Fee terms are non-overlapping per pool, enabling accurate historical fee reconstruction.
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## Chains and Coverage
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ETH, BSC, Base, Arbitrum, Unichain, Avalanche, Polygon, Celo, Linea, Optimism (others on request).
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Full history from chain genesis; reorg-aware real-time ingestion and updates.
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## Schema
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List of columns exactly as delivered:
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• pool_uid BYTEA – Unique pool identifier (FK to liquidity_pools)
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• exchange_id INTEGER – Exchange/DEX identifier
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• type_id INTEGER – Pool type identifier (FK to liquidity_pool_types)
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• block_number BIGINT – Block where the new fee term starts
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• block_time TIMESTAMPTZ – UTC timestamp when the block was mined
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• tx_index INTEGER – Transaction index within the block
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• log_index INTEGER – Log index within the block
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• total_fee NUMERIC(18,18) – Total fee fraction (e.g., 0.003 = 0.30%)
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• user_fee NUMERIC(18,18) – User/LP fee fraction (same units as total_fee)
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• protocol_fee NUMERIC(18,18) – Protocol fee fraction (same units as total_fee)
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• extra_fee NUMERIC(18,18) – Extra fee fraction (burn/staking/etc.)
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• _tracing_id BYTEA – Tracing ID of this fee terms record
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• _genesis_tracing_ids BYTEA[] – Tracing IDs of the genesis records leading to this record
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• _parent_tracing_ids BYTEA[] – Tracing IDs of the parent records leading to this record
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• _created_at TIMESTAMPTZ – Record creation timestamp
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• _updated_at TIMESTAMPTZ – Record last update timestamp
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### Notes
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• Primary key: (pool_uid, block_number, tx_index, log_index) guarantees uniqueness per fee change event.
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• Fee fractions are between 0 and 1; user_fee + protocol_fee + extra_fee ≤ 1.
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• Indexes on (pool_uid, block_number DESC, tx_index DESC, log_index DESC), block_number, block_time, and total_fee support fast lookups.
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## Lineage
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Each fee terms record includes deterministic _tracing_id, _genesis_tracing_ids, and _parent_tracing_ids, providing:
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• Provenance tracking from raw logs to decoded fee changes
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• Reproducible analytics and signal extraction
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• Cross-system consistency checks (RPC vs. indexers vs. internal warehouses)
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## Common Use Cases
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• Historical fee reconstruction for swap cost analysis
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• DEX fee comparison and competitive analysis
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• Protocol revenue estimation and forecasting
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• Fee change event detection and alerting
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## Quality
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• Verifiable lineage: deterministic cryptographic hashes per row
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• Reorg-aware ingestion: continuity and consistency across forks
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• Complete historical coverage: from chain genesis to present
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pretty_name: BlockDB Liquidity Pools Fee Terms - Sample
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size_categories:
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- 10M<n<100M
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dataset_info:
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homepage: https://docs.blockdb.io/data-catalog/evm/entities/liquidity-pools-fee-terms
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---
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*Small evaluation sample.*
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**`0212`** · `blockdb_evm.b0212_liquidity_pools_fee_terms_v1` - Per-pool fee configuration (total fee + split between user/LP, protocol, and extra recipients).
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**🌐 [BlockDB docs — schema, API, WebSocket & signup](https://docs.blockdb.io/data-catalog/evm/entities/liquidity-pools-fee-terms)**
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