npm install @gear-js/api
或者
yarn add @gear-js/api

import { GearApi } from '@gear-js/api'

const rpc = "wss://rpc-node.gear-tech.io"
const gearApi = await GearApi.create({
  providerAddress: rpc
})
const chain = await gearApi.chain()
const nodeName = await gearApi.nodeName()
const nodeVersion = await gearApi.nodeVersion()
console.log(`You are connected to chain ${chain} using ${nodeName} v${nodeVersion}`)
// 获取最新块信息
await gearApi.gearEvents.subscribeToNewBlocks((header) => {
  console.log(`New block with number: ${header.number.toNumber()} and hash: ${header.hash.toHex()}`)
})

import { getWasmMetadata } from '@gear-js/api'
const fileBuffer = fs.readFileSync('path/to/program.meta.wasm')
const meta = await getWasmMetadata(fileBuffer)
console.log({meta})

// 创建一个新的 keyring
const { keyring, json } = await GearKeyring.create('keyringName')
// 从 JSON 文件得到 keyring
const jsonKeyring = fs.readFileSync('path/to/keyring.json').toString()
const keyring = GearKeyring.fromJson(jsonKeyring)

const code = fs.readFileSync('path/to/program.wasm')
const somePayload = {
  name: "GearFans Token",
  symbol: "GFT"
}
const uploadProgram = {
  code,
  gasLimit: 1_000_000,
  value: 0,
  initPayload: somePayload
};
const programId = await gearApi.program.submit(uploadProgram, meta)
await gearApi.program.signAndSend(keyring, (data) => {
  console.log(data)
});

const payload = {
  "mint": {
    "account": "5CyREBErNFhogptd92dtC8ybuoUczVYh2ijvdhTpS2PJGeq7",
    "amount": "1000",
  }
}
const message = {
  destination: programId, // programId
  payload: payload,
  gasLimit: 1_000_000,
  value: 0
}
await gearApi.message.submit(message, meta)
await gearApi.message.signAndSend(keyring, (data) => {
  console.log(data)
})

const payload = {
  "BalanceOf": "5CyREBErNFhogptd92dtC8ybuoUczVYh2ijvdhTpS2PJGeq7"
}

const rpc = "wss://rpc-node.gear-tech.io"
const gearApi = await GearApi.create({
  providerAddress: rpc
})
gearApi.allEvents((events) => {
  events.forEach(async ({
    event: { data, method }
  }) => {
    if (method == "MessageDispatched") {}
    if (method == "Log") {}
  })
})

let decoded = CreateType.decode(type, payload, meta)
console.log(JSON.stringify(decoded))