proton_backend_base.ts

  import { Api, JsonRpc, JsSignatureProvider } from "@proton/js";

  // THOSE ENDPOINTS ARE TESTNET
  // BE SURE TO TEST THIS SCRIPT WITH A TESTNET ACCOUNT
  const EPS = [
    "https://testnet.brotonbp.com",
    "https://api-protontest.saltant.io",
    "https://api.testnet.protongb.com",
    "https://testnet-api.protongroup.info",
    "https://test.proton.kiwi",
    "https://bptestnet.xprasia.com",
  ];

  export class GetRewardTes {
    private rpc: JsonRpc = new JsonRpc(EPS);
    /*
    ## NEEDED ONLY IF YOU WANT TO CALL SMART CONTRACT FROM BACKEND, NEVER USE ON FRONT END !!!!!
    private sign: JsSignatureProvider = new JsSignatureProvider([
      "... proton_account_private_key...",
    ]);
    */
    
    private api = new Api({ rpc: this.rpc, signatureProvider: this.sign });
    
    // PUBLIC FETCH OF A TABLE NAMED STAKERS SO NOT SIGN IS NEEDED
    async fetchStakes() {
      const rows = await this.api.rpc.get_table_rows({
        code: "snipstake",
        table: "stakers",
        scope: "crotte",
        limit: 2000,
        //reverse:true
      });
      
      return rows;
    }

  // CALLING A SMART CONTRACT IN THE NAME OF CROTTE REQUIRE SIGN 
  // (FROM THE WEB AUTH IF IS FRONTEND OR WITH THE SIGN STUFF On TOP OF THE FILE)
  async pushStake() {
    const action = {
      account: "snipstake",
      name: "transfer",
      authorization: [{ actor: "crotte", permission: "active" }],
      data: {
        from: "crotte",
        to: account.actor,
        amount: Math.floor(Math.random() * 100000000)+10000,
      }
    };
    // YOU CAN ALSO FIND THE TRANSACT FUNCTION IN THE 
    // PROTON WEB SDK (FOR FRONT END USER WALLET IINTERACTION)
    return await this.api.transact(
      {
        actions: [action],
      },
      {
        blocksBehind: 3,
        expireSeconds: 30,
      }
    );
  }
}