docs: added provider.FeeData

docs.wrm/api/providers/provider.wrm

@@ -240,6 +240,27 @@ gasPrice = await provider.getGasPrice()
 utils.formatUnits(gasPrice, "gwei")
 //_log:
 
+_property: provider.getFeeData() => Promise<[[providers-FeeData]]>  @<Provider-getFeeData> @SRC<abstract-provider>
+Returns the current recommended [[providers-FeeData]] to use in a transaction.
+
+For an EIP-1559 transaction, the ``maxFeePerGas`` and ``maxPriorityFeePerGas``
+should be used.
+
+For legacy transactions and networks which do not support EIP-1559, the ``gasPrice``
+should be used.
+
+_code: @lang<javascript>
+
+// The gas price (in wei)...
+feeData = await provider.getFeeData()
+//_log: feeData
+
+// ...often these values are easier to understand or
+// display to the user in gwei
+//_result:
+utils.formatUnits(feeData.maxFeePerGas, "gwei")
+//_log:
+
 _property: provider.ready => Promise<[[providers-Network]]> @<Provider-ready> @src<providers/base-provider>
 Returns a Promise which will stall until the network has heen established,
 ignoring errors due to the target node not being active yet.

docs.wrm/api/providers/types.wrm

@@ -34,6 +34,23 @@ _property: network.ensAddress => string<[[address]]>
 The address at which the ENS registry is deployed on this network.
 
 
+_subsection: FeeData @<providers-FeeData>
+
+A **FeeData** object encapsulates the necessary fee data required
+to send a transaction, based on the best available recommendations.
+
+_property: feeData.gasPrice => [[BigNumber]]
+The gasPrice to use for legacy transactions or networks which do not
+support EIP-1559.
+
+_property: feeData.maxFeePerGas => [[BigNumber]]
+The ``maxFeePerGas`` to use for a transaction. This is based on the
+most recent block's ``baseFee``.
+
+_property: feeData.maxPriorityFeePerGas => [[BigNumber]]
+The ``maxPriorityFeePerGas`` to use for a transaction. This accounts
+for the uncle risk and for the majority of current MEV risk.
+
 _subsection: Block @<providers-Block>
 
 _property: block.hash => string<[[DataHexString]]<32>>