[Feat] Add getPriorityFeeEstimate Method (#74)

* Add getPriorityFeeEstimate Method

* Add getTokenAccounts Back In

* Remove Whitespace

Author: 0xIchigo

src/RpcClient.ts

@@ -13,6 +13,7 @@ import {
 } from "@solana/web3.js";
 import axios from "axios";
 import { DAS } from "./types/das-types";
+import { GetPriorityFeeEstimateRequest, GetPriorityFeeEstimateResponse } from "./types";
 
 export type SendAndConfirmTransactionResponse = {
   signature: TransactionSignature;
@@ -400,6 +401,31 @@ export class RpcClient {
   }
 
     /**
+  * Get priority fee estimate
+  * @returns {Promise<GetPriorityFeeEstimateResponse>}
+  * @throws {Error}
+  */
+  async getPriorityFeeEstimate(
+    params: GetPriorityFeeEstimateRequest
+  ): Promise<GetPriorityFeeEstimateResponse> {
+    try {
+      const url = `${this.connection.rpcEndpoint}`;
+      const response = await axios.post(url, {
+        jsonrpc: "2.0",
+        id: this.id,
+        method: "getPriorityFeeEstimate",
+        params: [params],
+      }, {
+        headers: { "Content-Type": "application/json" },
+      });
+
+      return response.data.result as GetPriorityFeeEstimateResponse;
+    } catch (error) {
+      throw new Error(`Error fetching priority fee estimate: ${error}`);
+    }
+  }
+ 
+  /**
    * Get information about all the edition NFTs for a specific master NFT
    * @returns {Promise<DAS.GetNftEditionsResponse>}
    * @throws {Error}
@@ -423,8 +449,8 @@ export class RpcClient {
       throw new Error(`Error in getNftEditions: ${error}`);
     }
   }
-  
-    /**
+
+  /**
    * Get information about all token accounts for a specific mint or a specific owner
    * @returns {Promise<DAS.GetTokenAccountsResponse>}
    * @throws {Error}

src/types/enums.ts

@@ -570,3 +570,21 @@ export enum MintApiAuthority {
   MAINNET = "HnT5KVAywGgQDhmh6Usk4bxRg4RwKxCK4jmECyaDth5R",
   DEVNET = "2LbAtCJSaHqTnP9M5QSjvAMXk79RNLusFspFN5Ew67TC",
 }
+
+export enum PriorityLevel {
+  NONE = "NONE",
+  LOW = "LOW",
+  MEDIUM = "MEDIUM",
+  HIGH = "HIGH",
+  VERY_HIGH = "VERY_HIGH",
+  UNSAFE_MAX = "UNSAFE_MAX",
+  DEFAULT = "DEFAULT",
+}
+
+export enum UiTransactionEncoding {
+  Binary = "Binary",
+  Base64 = "Base64",
+  Base58 = "Base58",
+  Json = "Json",
+  JsonParsed = "JsonParsed",
+}

src/types/types.ts

@@ -9,6 +9,8 @@ import type {
   TransactionContext,
   TxnStatus,
   AccountWebhookEncoding,
+  PriorityLevel,
+  UiTransactionEncoding,
 } from "./enums";
 
 export type HeliusCluster = Omit<Cluster, "testnet">;
@@ -316,4 +318,31 @@ export interface FullRwaAccount {
   data_registry?: DataRegistryAccount;
   identity_registry?: IdentityRegistryAccount;
   policy_engine?: PolicyEngine;
+}
+
+export interface GetPriorityFeeEstimateOptions {
+  priorityLevel?: PriorityLevel;
+  includeAllPriorityFeeLevels?: boolean;
+  transactionEncoding?: UiTransactionEncoding;
+  lookbackSlots?: number;
+}
+
+export interface GetPriorityFeeEstimateRequest {
+  transaction?: string;
+  accountKeys?: string[];
+  options?: GetPriorityFeeEstimateOptions;
+}
+
+export interface MicroLamportPriorityFeeLevels {
+  none: number;
+  low: number;
+  medium: number;
+  high: number;
+  veryHigh: number;
+  unsafeMax: number;
+}
+
+export interface GetPriorityFeeEstimateResponse {
+  priorityFeeEstimate?: number;
+  priorityFeeLevels?: MicroLamportPriorityFeeLevels; 
 }