Adds Eth feeHistory & maxPriorityFeePerGas rpc (#4956)

* Adds Eth feeHistory & maxPriorityFeePerGas

* linted

* Fixes rpc method ordering

packages/types/src/interfaces/eth/definitions.ts

@@ -164,6 +164,12 @@ const types: DefinitionsTypes = objectSpread({}, V0, V1, V2, {
     data: 'Option<Bytes>',
     nonce: 'Option<U256>'
   },
+  EthFeeHistory: {
+    oldestBlock: 'U256',
+    baseFeePerGas: 'Vec<U256>',
+    gasUsedRatio: 'Vec<f64>',
+    reward: 'Option<Vec<Vec<U256>>>'
+  },
   EthFilter: {
     fromBlock: 'Option<BlockNumber>',
     toBlock: 'Option<BlockNumber>',

packages/types/src/interfaces/eth/rpc.ts

@@ -96,6 +96,24 @@ export const rpc: DefinitionsRpc = objectSpread({}, netRpc, web3Rpc, {
     ],
     type: 'U256'
   },
+  feeHistory: {
+    description: 'Returns fee history for given block count & reward percentiles',
+    params: [
+      {
+        name: 'blockCount',
+        type: 'U256'
+      },
+      {
+        name: 'newestBlock',
+        type: 'BlockNumber'
+      },
+      {
+        name: 'rewardPercentiles',
+        type: 'Option<Vec<f64>>'
+      }
+    ],
+    type: 'EthFeeHistory'
+  },
   gasPrice: {
     description: 'Returns current gas price.',
     params: [],
@@ -368,6 +386,11 @@ export const rpc: DefinitionsRpc = objectSpread({}, netRpc, web3Rpc, {
     params: [],
     type: 'U256'
   },
+  maxPriorityFeePerGas: {
+    description: 'Returns max priority fee per gas',
+    params: [],
+    type: 'U256'
+  },
   mining: {
     description: 'Returns true if client is actively mining new blocks.',
     params: [],