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1. 配置wasm

下载wasm地址：https://kaspa.aspectron.org/nightly/downloads/
在项目根目录下添加wasm目录， 将下载的wasm文件中web目录下kaspa和kaspa-dev文件家复制到项目wasm下

2. 钱包地址创建

import { EventEmitter } from 'events';
import {kaspaToSompi,type IPaymentOutput,createTransactions,PrivateKey,UtxoProcessor,UtxoContext,RpcClient
} from "../wasm/kaspa-dev";class TransactionSender extends EventEmitter {private networkId: string;private privateKey: PrivateKey;private processor: UtxoProcessor;private context: UtxoContext;private rpc: RpcClient;constructor(networkId: string, privKey: PrivateKey, rpc: RpcClient) {super();this.networkId = networkId;this.privateKey = privKey;this.processor = new UtxoProcessor({ rpc, networkId });this.rpc = this.processor.rpc;this.context = new UtxoContext({ processor: this.processor });this.registerProcessor();}async transferFunds(address: string, amount: string): Promise<string> {const payments: IPaymentOutput[] = [{address: address,amount: kaspaToSompi(amount)!}];return await this.send(payments);}private async send(outputs: IPaymentOutput[]): Promise<string> {const { transactions, summary } = await createTransactions({entries: this.context,outputs,changeAddress: this.privateKey.toPublicKey().toAddress(this.networkId).toString(),priorityFee: kaspaToSompi("0.02")});for (let i = 0; i < transactions.length; i++) {await this.submitTransaction(transactions[i]);}return summary.finalTransactionId;}private async submitTransaction(transaction: any) {transaction.sign([this.privateKey]);await transaction.submit(this.rpc);}private registerProcessor() {this.processor.addEventListener("utxo-proc-start", async () => {await this.context.clear();await this.context.trackAddresses([this.privateKey.toPublicKey().toAddress(this.networkId).toString()]);});this.processor.start();}
}export default TransactionSender;

3. KAS转账&余额查询

import {RpcClient,Encoding,Resolver,PrivateKey,IGetServerInfoResponse,type IPaymentOutput,kaspaToSompi,createTransactions,IGetBalanceByAddressResponse
} from "../wasm/kaspa-dev";
import {IGetBalanceByAddressRequest, UtxoEntryReference} from "../wasm/kaspa";class Sender {public client: RpcClient;private network: string;constructor(network: string = 'testnet-10') {this.network = network;this.client = new RpcClient({resolver: new Resolver(),encoding: Encoding.Borsh,networkId: network});}public async connect() {await this.client.connect();}public async disconnect() {await this.client.disconnect();}public async getServerInfo(): Promise<IGetServerInfoResponse> {return await this.client.getServerInfo()}public async transfer(fromPrivateKey: string, address: string, amount: string): Promise<string> {try {const privateKey = new PrivateKey(fromPrivateKey);const sourceAddress = privateKey.toKeypair().toAddress(this.network);let {entries} = (await this.client.getUtxosByAddresses([sourceAddress]));const payments: IPaymentOutput[] = [{address: address,amount: kaspaToSompi(amount)!}];return await this.send(privateKey, entries, payments);} catch (error) {return error}}private async send(privateKey: PrivateKey, entries: UtxoEntryReference[], outputs: IPaymentOutput[]): Promise<string> {const { transactions, summary } = await createTransactions({entries: entries,outputs,changeAddress: privateKey.toPublicKey().toAddress(this.network).toString(),priorityFee: kaspaToSompi("0"),networkId: this.network});for (const transaction of transactions) {transaction.sign([privateKey]);await transaction.submit(this.client);}return summary.finalTransactionId;}// Method to get the balance of the addresspublic async getBalance(address: string): Promise<IGetBalanceByAddressResponse> {const balanceRequest: IGetBalanceByAddressRequest = {address: address,};return this.client.getBalanceByAddress(balanceRequest);}
}export default Sender;

4. KRC-20 处理

import {RpcClient, Encoding, Resolver, ScriptBuilder, Opcodes, PrivateKey,addressFromScriptPublicKey, createTransactions, kaspaToSompi, createTransaction, calculateTransactionFee
} from "../wasm/kaspa";const u64MaxValue = 18446744073709551615;
const baseKasToP2SHAddress = "1.3";export interface KRC20Data {p: "krc-20";op: 'mint' | 'deploy' | 'transfer';tick: string;to?: string;amt?: string;max?: string;lim?: string;dec?: "8";pre?: string;
}class KRC20 {public client: RpcClient;private network: string;constructor(network: string = 'testnet-10') {this.network = network;this.client = new RpcClient({resolver: new Resolver(),encoding: Encoding.Borsh,networkId: network});}public async connect() {await this.client.connect();}public async disconnect() {await this.client.disconnect();}public async mint(_privateKey: string, data: KRC20Data) {return this.send(_privateKey, data)}public async deploy(_privateKey: string, data: KRC20Data) {return this.send(_privateKey, data)}public async transfer(_privateKey: string, data: KRC20Data) {return this.send(_privateKey, data)}public async send(_privateKey: string, data: KRC20Data) {const privateKey = new PrivateKey(_privateKey);const publicKey = privateKey.toPublicKey();const address = publicKey.toAddress(this.network);const script = new ScriptBuilder().addData(privateKey.toPublicKey().toXOnlyPublicKey().toString()).addOp(Opcodes.OpCheckSig).addOp(Opcodes.OpFalse).addOp(Opcodes.OpIf).addData(Buffer.from("kasplex")).addI64(0n).addData(Buffer.from(JSON.stringify(data, null, 0))).addOp(Opcodes.OpEndIf);let scriptPublicKey = script.createPayToScriptHashScript()const P2SHAddress = addressFromScriptPublicKey(scriptPublicKey, this.network)!;try {const {entries} = await this.client.getUtxosByAddresses({addresses: [address.toString()]});const {transactions, summary} = await createTransactions({priorityEntries: [],entries,outputs: [{address: P2SHAddress.toString(),amount: kaspaToSompi(baseKasToP2SHAddress)!}],changeAddress: address.toString(),priorityFee: kaspaToSompi("0"),networkId: this.network});for (const transaction of transactions) {transaction.sign([privateKey]);await transaction.submit(this.client);}const hash = summary.finalTransactionIdconsole.log(`summary finalTransactionId transaction on: ${hash}`, 'INFO');var revealEntries = [{"address": P2SHAddress.toString(),"amount":kaspaToSompi(baseKasToP2SHAddress)!,"outpoint":{"transactionId":hash,"index":0},"scriptPublicKey":"0000" + scriptPublicKey.script,"blockDaaScore":u64MaxValue,"isCoinbase":false}];var fee = kaspaToSompi(this.getFee(data.op))!.valueOf()let tx = createTransaction(revealEntries, [], kaspaToSompi("0")!)fee = fee + calculateTransactionFee(this.network, tx).valueOf()return await this.sendRevealTransaction(privateKey, address, revealEntries, script, fee)} catch (error) {return error}}// Helper function to determine the KASPA amount based on the operation typeprivate getFee(optype): string {switch (optype) {case 'deploy':return "1000";case 'mint':return "1";case 'transfer':return "1";default:return "2";  // Default to "2" if the operation is unknown}}public async sendRevealTransaction(privateKey, address, revealEntries, script, fee) {const { transactions, summary } = await createTransactions({priorityEntries: revealEntries,entries: revealEntries,outputs: [],changeAddress: address.toString(),priorityFee: fee,networkId: this.network});for (const transaction of transactions) {transaction.sign([privateKey], false);const ourOutput = transaction.transaction.inputs.findIndex((input) => input.signatureScript === '');if (ourOutput !== -1) {const signature = await transaction.createInputSignature(ourOutput, privateKey);transaction.fillInput(ourOutput, script.encodePayToScriptHashSignatureScript(signature));}await transaction.submit(this.client);}return summary.finalTransactionId}}
export default KRC20;

5. 使用demo

import Rpc from "./src/transaction";
import KRC20 from "./src/script";//   -------------------------------------- server information --------------------------------------
// let rpc = new Rpc()
// await rpc.connect()
// let serverInfo = await rpc.getServerInfo()
// console.log("serverInfo;",serverInfo)
// if (!serverInfo.isSynced || !serverInfo.hasUtxoIndex) {
//   await rpc.disconnect();
//   process.exit(1);
// }//   -------------------------------------- KAS balance--------------------------------------
// let rpc = new Rpc()
// await rpc.connect()
// let address = "kaspatest:*******"
// let balance = await rpc.getBalance(address)
// console.log("balance:", balance)//   -------------------------------------- transfer KAS --------------------------------------
// let rpc = new Rpc()
// await rpc.connect()
// let privateKey = "****"
// let address = "kaspatest:****"
// let amount = "1"
// let txhash = await rpc.transfer(privateKey, address, amount)
// console.log("txhash;",txhash)//   -------------------------------------- mint --------------------------------------
let privateKey = "*****"
let krc20 = new KRC20()
await krc20.connect()
var mintdata = {p: "krc-20",op: 'mint',tick: "****"
}
let txid = await krc20.mint(privateKey, mintdata)
console.log("txsh", txid)// -------------------------------------- transfer --------------------------------------
// let krc20 = new KRC20()
// let privateKey = "****"
// await krc20.connect()
// var transferdata = {
//     p: "krc-20",
//     op: 'transfer',
//     tick: "SNOWDN",
//     to: "kaspatest:****",
//     amt: "1000000000",
// }
// let txid = await krc20.transfer(privateKey, transferdata)
// console.log("txsh", txid)// -------------------------------------- deploy --------------------------------------
// let krc20 = new KRC20()
// await krc20.connect()
// var deploydata = {
//     p: "krc-20",
//     op: 'deploy',
//     tick: "JEMES1",
//     to: "kaspatest:*****",
//     amt: "1000000000",
//     max: "1000000000000000",
//     lim: "1000000000",
//     dec: "8",
//     pre: "1000000000000000",
// }
// let txid = await krc20.deploy(privateKey, deploydata)
// console.log("txsh", txid)process.exit(1);