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go get


Send AR or Winston

package main

import (

func main() {
	wallet, err := goar.NewWalletFromPath("./test-keyfile.json", "")
	if err != nil {

	tx, err := wallet.SendAR(
  //id, err := wallet.SendWinston( 
		big.NewFloat(1.0), // AR amount
		{{target}}, // target address

	fmt.Println(tx.ID, err)

Send Data

tx, err := wallet.SendData(
  []byte("123"), // Data bytes
      Name:  "testSendData",
      Value: "123",

fmt.Println(id, err) // {{id}}, nil

Send Data SpeedUp

Arweave occasionally experiences congestion, and a low Reward can cause a transaction to fail; use speedUp to accelerate the transaction.

speedUp := int64(50) // means reward = reward * 150%
tx, err := wallet.SendDataSpeedUp(
  []byte("123"), // Data bytes
      Name:  "testSendDataSpeedUp",
      Value: "123",

fmt.Println(tx.ID, err)



  • GetInfo
  • GetTransactionByID
  • GetTransactionStatus
  • GetTransactionField
  • GetTransactionData
  • GetTransactionPrice
  • GetTransactionAnchor
  • SubmitTransaction
  • Arql(Deprecated)
  • GraphQL
  • GetWalletBalance
  • GetLastTransactionID
  • GetBlockByID
  • GetBlockByHeight
  • BatchSendItemToBundler
  • GetBundle
  • GetTxDataFromPeers
  • BroadcastData
  • GetUnconfirmedTx
  • GetPendingTxIds
  • GetBlockHashList
  • ConcurrentDownloadChunkData

Initialize the instance:

arClient := goar.NewClient("")

// if your network is not good, you can config http proxy
proxyUrl := ""
arClient := goar.NewClient("", proxyUrl)


  • SendAR
  • SendARSpeedUp
  • SendWinston
  • SendWinstonSpeedUp
  • SendData
  • SendDataSpeedUp
  • SendTransaction
  • CreateAndSignBundleItem
  • SendBundleTxSpeedUp
  • SendBundleTx
  • SendPst

Initialize the instance, use a keyfile.json:

arWallet := goar.NewWalletFromPath("./keyfile.json")

// if your network is not good, you can config http proxy
proxyUrl := ""
arWallet := NewWalletFromPath("./keyfile.json", "", proxyUrl)


  • SignTx
  • SignMsg
  • Owner
signer := goar.NewSignerFromPath("./keyfile.json")


Package for Arweave develop toolkit.

  • Base64Encode
  • Base64Decode
  • Sign
  • Verify
  • DeepHash
  • GenerateChunks
  • ValidatePath
  • OwnerToAddress
  • OwnerToPubKey
  • TagsEncode
  • TagsDecode
  • PrepareChunks
  • GetChunk
  • SignTransaction
  • GetSignatureData
  • VerifyTransaction
  • NewBundle
  • NewBundleItem
  • SubmitItemToBundlr
  • SubmitItemToArSeed

RSA Threshold Cryptography

  • CreateTcKeyPair
  • ThresholdSign
  • AssembleSigShares
  • VerifySigShare

Threshold Signature Usage Guidelines

Create RSA Threshold Cryptography:

bitSize := 512 // If the values are 2048 and 4096, then the generation functions below will perform minute-level times, and we need 4096 bits as the maximum safety level for production environments.
l := 5
k := 3
keyShares, keyMeta, err := goar.CreateTcKeyPair(bitSize, k, l)

New sign instance:

exampleData := []byte("aaabbbcccddd112233") // need sign data
ts, err := goar.NewTcSign(keyMeta, exampleData)

// signer threshold sign
signer01 := keyShares[0]
signedData01, err := ts.ThresholdSign(signer01)

// assemble sign
signedShares := tcrsa.SigShareList{
signature, err := ts.AssembleSigShares(signedShares)

// verify share sign 
err := ts.VerifySigShare(signer01)



make test

About chunks

  1. First, we use Chunk transactions for all types of transactions in this library, so we only support transactions where format equals 2.
  2. Second, the library already encapsulates a common interface for sending transactions : e.g SendAR; SendData. The user only needs to call this interface to send the transaction and do not need to worry about the usage of chunks.
  3. The third,If the user needs to control the transaction such as breakpoint retransmission and breakpoint continuation operations. Here is how to do it.

chunked uploading advanced options

upload all transaction data

The method of submitting a data transaction is to use chunk uploading. This method will allow larger transaction sizes, resuming a transaction upload if it's interrupted and give progress updates while uploading. Simple example:

arNode := ""
w, err := goar.NewWalletFromPath("../example/testKey.json", arNode) // your wallet private key
anchor, err := w.Client.GetTransactionAnchor()
if err != nil {
data, err := ioutil.ReadFile("./2.3MBPhoto.jpg")
if err != nil {

reward, err := w.Client.GetTransactionPrice(data, nil)
if err != nil {

tx := &types.Transaction{
  Format:   2,
  Target:   "",
  Quantity: "0",
  Tags:     utils.TagsEncode(tags),
  Data:     utils.Base64Encode(data),
  DataSize: fmt.Sprintf("%d", len(data)),
  Reward:   fmt.Sprintf("%d", reward*(100+speedFactor)/100),

tx.LastTx = anchor
tx.Owner = utils.Base64Encode(w.PubKey.N.Bytes())

if err = utils.SignTransaction(tx, w.PubKey, w.Signer.PrvKey); err != nil {

id = tx.ID

uploader, err := goar.CreateUploader(w.Client, tx, nil)
if err != nil {

err = uploader.Once()
if err != nil {
Breakpoint continuingly

You can resume an upload from a saved uploader object, that you have persisted in storage some using json.marshal(uploader) at any stage of the upload. To resume, parse it back into an object and pass it to getUploader() along with the transactions data:

uploaderBuf, err := ioutil.ReadFile("./jsonUploaderFile.json")
lastUploader := &txType.TransactionUploader{}
err = json.Unmarshal(uploaderBuf, lastUploader)
assert.NoError(t, err)

// new uploader object by last time uploader
newUploader, err := txType.CreateUploader(wallet.Client, lastUploader.FormatSerializedUploader(), bigData)
assert.NoError(t, err)
for !newUploader.IsComplete() {
  err := newUploader.UploadChunk()
  assert.NoError(t, err)

When resuming the upload, you must provide the same data as the original upload. When you serialize the uploader object with json.marshal() to save it somewhere, it will not include the data.

Breakpoint retransmission

You can also resume an upload from just the transaction ID and data, once it has been mined into a block. This can be useful if you didn't save the uploader somewhere but the upload got interrupted. This will re-upload all of the data from the beginning, since we don't know which parts have been uploaded:

bigData, err := ioutil.ReadFile(filePath)
txId := "myTxId"

// get uploader by txId and post big data by chunks
uploader, err := goar.CreateUploader(wallet.Client, txId, bigData)
assert.NoError(t, err)
assert.NoError(t, uploader.Once())
NOTE: About all chunk transfer full example can be viewed in path ./example/chunks_tx_test.go

About Arweave Bundles

  1. goar implemented creating, editing, reading and verifying bundles tx
  2. This is the ANS-104 standard protocol and refers to the arbundles js-lib implement

Create Bundle Item

signer, err := goar.NewSignerFromPath("./testKey.json") // rsa signer
// or 
signer, err := goether.NewSigner("0x.....") // ecdsa signer

// Create Item
data := []byte("aa bb cc dd")
target := "" // option 
anchor := "" // option
tags := []types.Tags{}{} // option bundle item tags
item01, err := itemSigner.CreateAndSignItem(data, target, anchor, tags)    
// Same as create item

assemble bundle and send to arweave network

You can send items directly to the arweave network

items := []types.BundleItem{item01, item02, item03 ...}
bundle, err := utils.NewBundle(items...)

w, err := goar.NewWalletFromPath("./key.json", arNode)

arTxTags := []types.Tags{}{} // option
tx, err := w.SendBundleTx(bd.BundleBinary, arTxtags)

Send Item to Arseeding gateway

Arseeding provides guaranteed data seeding and instant data accessibility

arseedUrl := ""
currency := "USDC" // used for payment fee currency
resp, err := utils.SubmitItemToArSeed(item01,currency,arseedUrl)

Send Item to Bundler gateway

Bundler provides guaranteed data seeding and instant data accessibility

bundlrUrl := ""
resp, err := utils.SubmitItemToBundlr(item01, bundlrUrl)

Verify Bundle Items

// verify
for _, item := range bundle.Items {
  err = utils.VerifyBundleItem(item)
  assert.NoError(t, err)

check bundle example

About Arseeding

if you can utils.SubmitItemToArseed(item,currency,arseedUrl) and you will get the following return response

    "ItemId": "5rEb7c6OjMQIYjl6P7AJIb4bB9CLMBSxhZ9N7BVbRCk",
    "bundler": "Fkj5J8CDLC9Jif4CzgtbiXJBnwXLSrp5AaIllleH_yY",
    "currency": "USDT",
    "decimals": 6,
    "fee": "701",
    "paymentExpiredTime": 1656044994,
    "expectedBlock": 960751

After you transfer 0.000701 USDT to bundler using everpay, arseeding will upload the item to arweave.
For more usage, jump to docs

About Bundlr

if you call utils.SubmitItemToBundlr(item,bundlrUrl) and return panic: send to bundler request failed; http code: 402
means that you have to pay ar to the bundler service address
must use item signature address to transfer funds

how to get bundler service address?
curl --location --request GET ''

    "version": "0.2.0",
    "addresses": {
        "arweave": "OXcT1sVRSA5eGwt2k6Yuz8-3e3g9WJi5uSE99CWqsBs",
        "ethereum": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "matic": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "bnb": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "avalanche": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "solana": "DHyDV2ZjN3rB6qNGXS48dP5onfbZd3fAEz6C5HJwSqRD",
        "arbitrum": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "boba-eth": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "boba": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "chainlink": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "kyve": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "fantom": "0xb4DE0833771eae55040b698aF5eB06d59E142C82",
        "near": "bundlr1.near",
    "gateway": ""

This "addresses" are the bundler service receive address.
You need to transfer a certain amount of token to this address
and wait for 25 blocks to confirm the transaction before you can use the bundler service.

You can also use the following api to query the balance in the bundler service.

curl --location --request GET ''

    "balance": 1000000000


Arweave http client and wallet implemented in go, Arweave SDK







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