The FeeSettings entry contains the current base transaction cost and reserve amounts as determined by fee voting. Each ledger version contains at most one FeeSettings entry.
This ledger entry has two formats, depending on whether the XRPFees amendment was enabled at the time fees were last updated:
{
"BaseFeeDrops": "10",
"BytecodeSizeLimit": 100000,
"Flags": 0,
"GasLimit": 1000000,
"GasPrice": 1000000,
"LedgerEntryType": "FeeSettings",
"PreviousTxnID": "FC0F9EF5D2C0D4DC75BCB71B69D6C7864E040C923D7016AF668024225DB00867",
"PreviousTxnLgrSeq": 107588353,
"ReserveBaseDrops": "1000000",
"ReserveIncrementDrops": "200000",
"index": "4BC50C9B0D8515D3EAAE1E74B29A95804346C491EE1A95BF25E4AAB854A6A651"
}The fields of the FeeSettings ledger entry depend on whether the XRPFees amendment was enabled the last time it was modified. If the last update was before the amendment became enabled, the entry uses the legacy format. If it has been updated after the amendment, it uses the current format. The fields it can have, in addition to the common fields, are as follows:
| Name | JSON Type | Internal Type | Required? | Description |
|---|---|---|---|---|
BaseFeeDrops | String | Amount | Yes | The transaction cost of the "reference transaction" in drops of XRP. |
BytecodeSizeLimit | Number | UInt32 | No | The maximum size, in bytes, of a WASM smart function, such as the Bytecode field of a smart escrow. (Requires the SmartEscrow amendment. |
GasLimit | Number | UInt32 | No | The maximum amount of gas that can be consumed by smart functions in a single transaction. Gas is a measure of the resources (including CPU and memory) used by smart function code, defined by the WASM engine. (Requires the SmartEscrow amendment. |
GasPrice | Number | UInt32 | No | The cost of gas, in millionths of a drop of XRP per 1 gas. In other words, a value of 1000000 (1 million) means that 1 gas costs 0.000001 decimal XRP. (Requires the SmartEscrow amendment. |
ReserveBaseDrops | String | Amount | Yes | The base reserve for an account in the XRP Ledger, as drops of XRP. |
ReserveIncrementDrops | String | Amount | Yes | The incremental owner reserve for owning objects, as drops of XRP. |
PreviousTxnID | String | UInt256 | No | The identifying hash of the transaction that most recently modified this entry. (Requires the fixPreviousTxnID amendment. |
PreviousTxnLgrSeq | Number | UInt32 | No | The index of the ledger that contains the transaction that most recently modified this entry. (Requires the fixPreviousTxnID amendment. |
)The following fields are added the first time [fee voting][] occurs after the relevant amendment is enabled, and are always present thereafter: BytecodeSizeLimit, GasLimit, GasPrice, PreviousTxnID, PreviousTxnLgrSeq.
There are no flags defined for the FeeSettings entry.
The ID of the FeeSettings entry is the hash of the FeeSettings space key (0x0065) only. This means that the ID is always:
4BC50C9B0D8515D3EAAE1E74B29A95804346C491EE1A95BF25E4AAB854A6A651