kristjank

import { app } from "@arkecosystem/core-container";

const blockchain = app.resolvePlugin("blockchain");

async function callBlockchainMethods() {
  // Check if the blockchain is fully synced
  blockchain.isSynced();

  // Get the last block we've received
  blockchain.getLastBlock();

kristjank

import { app } from "@arkecosystem/core-container";

const database = app.resolvePlugin("database");

async function callDatabaseMethods() {
  // Get a block from the database by its id
  await database.getBlock("some block id");

  // Skip the first 100 blocks, grab the next 100
  await database.getBlocks(100, 100);

kristjank

import { app } from "@arkecosystem/core-container";
import { EventEmitter, Logger } from "@arkecosystem/core-interfaces";

const logger = app.resolvePlugin<Logger.ILogger>("logger");
const emitter = app.resolvePlugin<EventEmitter.EventEmitter>("event-emitter");

emitter.on("forger.missing", delegate => {
  // This will be a wallet object that contains information like the address, username, public key, votes, etc.
  logger.warn(`${delegate.username} just missed a block.`);

kristjank

import { createServer, mountServer } from "@arkecosystem/core-http-utils";

export async function startServer(config) {
  const server = await createServer({
    host: config.host,
    port: config.port
  });

  server.route({
    method: "GET",

kristjank

const {
  dynamicFeeManager,
  transactionBuilder,
  formatArktoshi,
} = require('@arkecosystem/crypto')

const transaction = transactionBuilder
  .transfer()
  .recipientId('D9YiyRYMBS2ofzqkufjrkB9nHofWgJLM7f')
  .sign('secret passphrase')

kristjank

/**
 * Determine if transaction matches the accepted fee by delegate or max fee set by sender
 * @param {Transaction} Transaction - transaction to check
 * @return {Boolean} matches T/F
 */
 module.exports = (transaction) => {
  const transactionFee = transaction.fee.toNumber()
  const staticFee = feeManager.getForTransaction(transaction)
  const blockchain = container.resolvePlugin('blockchain')
  const feeConstants = config.getConstants(blockchain.getLastBlock().data.height).fees

kristjank

// Found in networks config folder in crypto/lib/networks
"dynamicOffsets": {
    "transfer": 100,
    "secondSignature": 250,
    "delegateRegistration": 500,
    "vote": 100,
    "multiSignature": 500,
    "ipfs": 250,
    "timelockTransfer": 500,
    "multiPayment": 500,

kristjank

  /** Calculates delegate fee for processing and forging if transaction
  * @param {Number} Fee price per byte in ARKTOSHI as set by forger/delegate in delegate.json setting feeMultiplier
  * @param {Transaction} Transaction for which we calculate dynamic fee
  * @returns {Number} Calculated dynamic fee in ARKTOSHI
  */
  calculateFee (feeMultiplier, transaction) {
    if (feeMultiplier <= 0) {
      feeMultiplier = 1
    }
    // We get the transactions offset for a transaction type and 

kristjank

// serialised transaction Transfer
// serialised.length = 160
{"serialized":
  {
    "type":"Buffer",
    "data":[255,1,30,0,22,116,215,2,3,215,223,228,78,119,16,57,51,79,71,18,251,149,173,53,82,84,246,116,200,245,210,134,80,49,153,21,123,123,247,195,87,14,1,0,0,0,0,0,0,6,84,73,68,58,32,48,0,194,235,11,0,0,0,0,15,0,0,0,30,72,161,107,90,67,151,232,118,184,105,194,229,52,233,123,39,157,230,102,177,48,68,2,32,69,177,255,192,154,14,176,62,80,182,75,185,130,144,48,143,68,177,152,153,1,75,93,101,109,175,41,10,149,220,23,79,2,32,15,59,8,76,121,202,240,45,147,56,172,137,149,29,183,136,156,137,156,69,81,149,205,254,98,22,126,19,61,71,244,227]
  }
}

kristjank

// dynamic transaction payload
 {
    "verified":true,
    "id":"afaa18bfc29762b7b5172fa1f71ea7471c0d9e6dcf2992638865ecb4b3d1f26b",
    "version":1,
    "timestamp":47674390,
    "senderPublicKey":"03d7dfe44e771039334f4712fb95ad355254f674c8f5d286503199157b7bf7c357",
    "recipientId":"DBm8ZgZvaDhgba9jyFNVwDGD8ysbN3w8Tv",
    "type":0,
    "vendorFieldHex":"5449443a2030",