| liquidity_pool_id | Unique identifier for a liquidity pool. There cannot be duplicate pools for the same asset pair. Once a pool has been created for the asset pair, another cannot be created. | string | | Yes | There is a good primer on AMMs here |
| type | The mechanism that calculates pricing and division of shares for the pool. With the initial AMM rollout, the only type of liquidity pool allowed to be created is a constant product pool | string | constant_product | Yes | For more information regarding pricing and deposit calculations, read Cap-38. |
| fee | The number of basis points charged as a percentage of the trade in order to complete the transaction. The fees earned on all trades are divided amongst pool shareholders and distributed as an incentive to keep money in the pools | integer | 30 | Yes | Fees are distributed immediately to accounts as the transaction completes. There is no schedule for fee distribution |
| trustline_count | Total number of accounts with trustlines authorized to the pool. To create a trustline, an account must trust both base assets before trusting a pool with the asset pair | integer | | Yes | If the issuer of A or B revokes authorization on the trustline, the account will automatically withdraw from every liquidity pool containing that asset and those pool trustlines will be deleted. |
| pool_share_count | Participation in a liquidity pool is represented by a pool share. The total number of pool shares is calculated by a constant product formula and is an arbitrary number representing the amount of participation in the pool. | float | | Yes | Shares are not transferable; the only way to increase the number of pool shares held is to deposit into a liquidity pool. Conversely, decreasing pools shares can only be accomplished through a withdraw operation. Shares cannot be sent in payments or sold using offers. |
| asset_a_type | The identifier for type of asset code, can be an alphanumeric with 4 characters, 12 characters or the native asset to the network, XLM. | string | - credit_alphanum4
- credit_alphanum12
- native
| Yes | |
| asset_a_code | The 4 or 12 character code representation of the asset of one of the two asset pairs in a liquidity pool | string | | No | |
| asset_a_issuer | The account address of the original asset issuer that created one of the two asset pairs in the liquidity pool | string | | No | |
| asset_a_amount | The raw number of tokens locked in the pool for one of the two asset pairs in the liquidity pool | float | | Yes | The amount is a better representation of liquidity in the pool over pool share counts. |
| asset_b_type | The identifier for type of asset code, can be an alphanumeric with 4 characters, 12 characters or the native asset to the network, XLM. | string | - credit_alphanum4
- credit_alphanum12
- native
| Yes | |
| asset_b_code | The 4 or 12 character code representation of the asset of one of the two asset pairs in a liquidity pool | string | | No | |
| asset_b_issuer | The account address of the original asset issuer that created one of the two asset pairs in the liquidity pool | string | | No | |
| asset_b_amount | The raw number of tokens locked in the pool for one of the two asset pairs in the liquidity pool | float | | Yes | The amount is a better representation of liquidity in the pool over pool share counts. |
| last_modified_ledger | The ledger sequence number when the ledger entry (this unique signer for the account) was modified. Deletions do not count as a modification and will report the prior modification sequence number | integer | | Yes | |
| ledger_entry_change | Code that describes the ledger entry change type that was applied to the ledger entry. | integer | - 0 - Ledger Entry Created
- 1 - Ledger Entry Updated
- 2 - Ledger Entry Deleted
- 3 - Ledger Entry State (value of the entry)
| Yes | Valid entry change types are 0, 1, and 2 for ledger entries of type liquidity_pools. |
| deleted | Indicates whether the ledger entry (liquidity pool) has been deleted or not. Once an entry is deleted, it cannot be recovered. Liquidity pools are deleted once all pool shares are withdrawn from the pool | boolean | | Yes | |
| batch_id | String representation of the run id for a given DAG in Airflow. Takes the form of "scheduled__<batch_end_date>-<dag_alias>". Batch ids are unique to the batch and help with monitoring and rerun capabilities | string | | Yes | |
| batch_run_date | The start date for the batch interval. When taken with the date in the batch_id, the date represents the interval of ledgers processed. The batch run date can be seen as a proxy of closed_at for a ledger. | datetime | | Yes | The table is partitioned on batch_run_date. It is recommended to always include the batch_run_date in the filter if possible to help reduce query cost. |
| batch_insert_ts | The timestamp in UTC when a batch of records was inserted into the database. This field can help identify if a batch executed in real time or as part of a backfill | timestamp | | Yes | |
| asset_a_id | Unique identifier for asset_a_code, asset_a_issuer | integer | | No | |
| asset_b_id | Unique identifier for asset_b_code, asset_b_issuer | integer | | No | |
| closed_at | Timestamp in UTC when this ledger closed and committed to the network. Ledgers are expected to close ~every 5 seconds | timestamp | | Yes | |
| ledger_sequence | The sequence number of this ledger. It represents the order of the ledger within the Stellar blockchain. Each ledger has a unique sequence number that increments with every new ledger, ensuring that ledgers are processed in the correct order. | integer | | Yes | |