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index.js
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index.js
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import * as CardanoWasm from "@emurgo/cardano-serialization-lib-browser";
import * as utils from "./utils.js"
import { Buffer } from "buffer";
import axios from "axios";
const yoroiBackendUrl = "https://testnet-backend.yoroiwallet.com/api"
const onScreenAlert = document.querySelector("#on-screen-alert")
const accessButton = document.querySelector("#access-button")
const isEnabledButton = document.querySelector("#is-enabled-button")
const getAccountBalanceButton = document.querySelector("#get-account-balance-button")
const getUnusedAddressesButton = document.querySelector("#get-unused-addresses-button")
const getUsedAddressesButton = document.querySelector("#get-used-addresses-button")
const getChangeAddressButton = document.querySelector("#get-change-address-button")
const getRewardAddressesButton = document.querySelector("#get-reward-addresses-button")
const getUTXOsButton = document.querySelector("#get-utxos-button")
const getCollateralUTXOsButton = document.querySelector("#get-collateral-utxos-button")
const signSendNFTToScriptButton = document.querySelector("#sign-send-nft-to-script-button")
const signRedeemNFTFromScriptButton = document.querySelector("#sign-redeem-nft-from-script-button")
const submitTxButton = document.querySelector("#submit-tx-button")
let api
let signedTx
let txHash
accessButton.addEventListener('click', () => {
if (!window.cardano.yoroi) {
alert("Yoroi wallet not found! Please install it")
return
}
window.cardano.yoroi.enable()
.then((yoroiApi) => {
api = yoroiApi
accessButton.className = "d-none"
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
isEnabledButton.addEventListener('click', () => {
window.cardano.yoroi.isEnabled()
.then((enabled) => {
setOnScreenAlert(enabled, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
getAccountBalanceButton.addEventListener('click', () => {
checkApiAvailable()
api.getBalance()
.then((hexBalance) => {
const wasmValue = CardanoWasm.Value.from_bytes(utils.hexToBytes(hexBalance))
const adaValue = wasmValue.coin().to_str()
const assetValue = wasmMultiassetToJSONs(wasmValue.multiasset())
setOnScreenAlert(`ADA: ${adaValue} Assets: ${JSON.stringify(assetValue)}`, "success")
})
})
getUnusedAddressesButton.addEventListener('click', () => {
checkApiAvailable()
api.getUnusedAddresses()
.then((hexAddresses) => {
const addresses = []
for (let i = 0; i < hexAddresses.length; i++) {
const wasmAddress = CardanoWasm.Address.from_bytes(utils.hexToBytes(hexAddresses[i]))
addresses.push(wasmAddress.to_bech32())
}
setOnScreenAlert(addresses, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
getUsedAddressesButton.addEventListener('click', () => {
checkApiAvailable()
api.getUsedAddresses({ page: 0, limit: 5 })
.then((hexAddresses) => {
const addresses = []
for (let i = 0; i < hexAddresses.length; i++) {
const wasmAddress = CardanoWasm.Address.from_bytes(utils.hexToBytes(hexAddresses[i]))
addresses.push(wasmAddress.to_bech32())
}
setOnScreenAlert(addresses, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
getChangeAddressButton.addEventListener('click', () => {
checkApiAvailable()
api.getChangeAddress()
.then((hexAddress) => {
const wasmAddress = CardanoWasm.Address.from_bytes(utils.hexToBytes(hexAddress))
setOnScreenAlert(wasmAddress.to_bech32(), "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
getRewardAddressesButton.addEventListener('click', () => {
checkApiAvailable()
api.getRewardAddresses()
.then((hexAddresses) => {
const addresses = []
for (let i = 0; i < hexAddresses.length; i++) {
const wasmAddress = CardanoWasm.Address.from_bytes(utils.hexToBytes(hexAddresses[i]))
addresses.push(wasmAddress.to_bech32())
}
setOnScreenAlert(addresses, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
getUTXOsButton.addEventListener('click', () => {
checkApiAvailable()
api.getUtxos()
.then((hexUtxos) => {
let utxos = []
for (let i = 0; i < hexUtxos.length; i++) {
const utxo = {}
const wasmUtxo = CardanoWasm.TransactionUnspentOutput.from_bytes(utils.hexToBytes(hexUtxos[i]))
const output = wasmUtxo.output()
const input = wasmUtxo.input()
utxo.tx_hash = utils.bytesToHex(input.transaction_id().to_bytes())
utxo.tx_index = input.index()
utxo.receiver = output.address().to_bech32()
utxo.amount = output.amount().coin().to_str()
utxo.asset = wasmMultiassetToJSONs(output.amount().multiasset())
utxos.push(JSON.stringify(utxo))
}
setOnScreenAlert(utxos, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
getCollateralUTXOsButton.addEventListener('click', () => {
checkApiAvailable()
api.getCollateral(2000000)
.then((hexUtxos) => {
let utxos = []
for (let i = 0; i < hexUtxos.length; i++) {
const utxo = {}
const wasmUtxo = CardanoWasm.TransactionUnspentOutput.from_bytes(utils.hexToBytes(hexUtxos[i]))
const output = wasmUtxo.output()
const input = wasmUtxo.input()
utxo.tx_hash = utils.bytesToHex(input.transaction_id().to_bytes())
utxo.tx_index = input.index()
utxo.receiver = output.address().to_bech32()
utxo.amount = output.amount().coin().to_str()
utxo.asset = wasmMultiassetToJSONs(output.amount().multiasset())
utxos.push(JSON.stringify(utxo))
}
setOnScreenAlert(utxos, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
signSendNFTToScriptButton.addEventListener('click', async () => {
checkApiAvailable()
const txBuilder = getTxBuilder()
const hexUtxos = await api.getUtxos("2000000")
// this key hash is needed as part of our policy Id
let wasmKeyHash
// add utxos for amount
const txInputsBuilder = CardanoWasm.TxInputsBuilder.new()
for (let i = 0; i < hexUtxos.length; i++) {
const wasmUtxo = CardanoWasm.TransactionUnspentOutput.from_bytes(utils.hexToBytes(hexUtxos[i]))
txInputsBuilder.add_input(wasmUtxo.output().address(), wasmUtxo.input(), wasmUtxo.output().amount())
if (i == 0) {
wasmKeyHash = CardanoWasm.BaseAddress.from_address(wasmUtxo.output().address()).payment_cred().to_keyhash()
}
}
txBuilder.set_inputs(txInputsBuilder)
// handle asset amounts
const wasmPubkeyScript = CardanoWasm.ScriptPubkey.new(wasmKeyHash)
const wasmNativeScript = CardanoWasm.NativeScript.new_script_pubkey(wasmPubkeyScript)
const wasmAssetName = CardanoWasm.AssetName.new(Buffer.from("NFT1", "utf8"))
const wasmAssets = CardanoWasm.Assets.new()
wasmAssets.insert(wasmAssetName, CardanoWasm.BigNum.from_str('1'))
const wasmMultiasset = CardanoWasm.MultiAsset.new()
wasmMultiasset.insert(wasmNativeScript.hash(), wasmAssets)
const wasmValue = CardanoWasm.Value.new_from_assets(wasmMultiasset)
wasmValue.set_coin(CardanoWasm.BigNum.from_str("3000000"))
// build and add output
const wasmScriptAddress = CardanoWasm.Address.from_bech32("addr_test1wpnlxv2xv9a9ucvnvzqakwepzl9ltx7jzgm53av2e9ncv4sysemm8")
const outputToScript = CardanoWasm.TransactionOutput.new(wasmScriptAddress, wasmValue)
outputToScript.set_data_hash(CardanoWasm.hash_plutus_data(CardanoWasm.PlutusData.new_integer(CardanoWasm.BigInt.from_str("42"))))
txBuilder.add_output(outputToScript)
// this adds a witness for minting asset
txBuilder.add_mint_asset(wasmNativeScript, wasmAssetName, CardanoWasm.Int.new_i32(1))
// add metadata
const metaDataObj = {
[utils.bytesToHex(wasmNativeScript.hash().to_bytes())]: {
"NFT1": {
description: "NFT For testing",
name: "Test NFT",
id: 0,
image: "https://google.com"
}
}
}
txBuilder.add_json_metadatum(CardanoWasm.BigNum.from_str("721"), JSON.stringify(metaDataObj))
// handle change
const changeAddress = await api.getChangeAddress()
const wasmChangeAddress = CardanoWasm.Address.from_bytes(utils.hexToBytes(changeAddress))
txBuilder.add_change_if_needed(wasmChangeAddress)
const wasmUnsignedTransaction = txBuilder.build_tx()
api.signTx(utils.bytesToHex(wasmUnsignedTransaction.to_bytes()))
.then((witnessHex) => {
const wasmWitnessSet = CardanoWasm.TransactionWitnessSet.from_bytes(utils.hexToBytes(witnessHex))
const signedTransaction = CardanoWasm.Transaction.new(wasmUnsignedTransaction.body(), wasmWitnessSet, wasmUnsignedTransaction.auxiliary_data())
signedTx = utils.bytesToHex(signedTransaction.to_bytes())
txHash = utils.bytesToHex(CardanoWasm.hash_transaction(wasmUnsignedTransaction.body()).to_bytes())
setOnScreenAlert(signedTx, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
.finally(() => {
txBuilder.free()
})
})
signRedeemNFTFromScriptButton.addEventListener('click', async () => {
checkApiAvailable()
const txBuilder = getTxBuilder()
// query transaction
if (!txHash) {
setOnScreenAlert("Please send NFT to script")
return
}
const scriptTx = await axios.post(
`${yoroiBackendUrl}/v2/txs/get`,
{
txHashes: [txHash]
}
)
const txInputsBuilder = CardanoWasm.TxInputsBuilder.new()
const scriptTxOutputs = scriptTx.data[txHash].outputs
for (let i = 0; i < scriptTxOutputs.length; i++) {
const output = scriptTxOutputs[i]
if (output.address == "addr_test1wpnlxv2xv9a9ucvnvzqakwepzl9ltx7jzgm53av2e9ncv4sysemm8") {
// handle plutus witness
const wasmPlutusScript = CardanoWasm.PlutusScript.from_bytes(utils.hexToBytes("4e4d01000033222220051200120011"))
const wasmDatum = CardanoWasm.PlutusData.new_integer(CardanoWasm.BigInt.from_str('42'))
const wasmRedemer = CardanoWasm.Redeemer.new(
CardanoWasm.RedeemerTag.new_spend(),
CardanoWasm.BigNum.zero(),
CardanoWasm.PlutusData.new_integer(CardanoWasm.BigInt.from_str("42")),
CardanoWasm.ExUnits.new(
CardanoWasm.BigNum.from_str('1700'),
CardanoWasm.BigNum.from_str('476468'),
),
)
const wasmPlutusWitness = CardanoWasm.PlutusWitness.new(wasmPlutusScript, wasmDatum, wasmRedemer)
// handle assets
const wasmTransactionInput = CardanoWasm.TransactionInput.new(CardanoWasm.TransactionHash.from_bytes(utils.hexToBytes(txHash), i))
const assets = output.assets
const wasmMultiasset = CardanoWasm.MultiAsset.new()
for (let i = 0; i < assets.length; i++) {
const wasmAssets = CardanoWasm.Assets.new()
wasmAssets.insert(CardanoWasm.AssetName.new(utils.hexToBytes(assets[i].name)), CardanoWasm.BigNum.from_str(assets[i].amount))
const wasmScriptHash = CardanoWasm.ScriptHash.from_bytes(utils.hexToBytes(assets[i].policyId))
wasmMultiasset.insert(wasmScriptHash, wasmAssets)
}
const wasmValue = CardanoWasm.Value.new_from_assets(wasmMultiasset)
wasmValue.set_coin(CardanoWasm.BigNum.from_str(output.amount))
// add plutus input
txInputsBuilder.add_plutus_script_input(wasmPlutusWitness, wasmTransactionInput, wasmValue)
}
}
txBuilder.set_inputs(txInputsBuilder)
// handle collateral inputs
const collateralTxInputsBuilder = CardanoWasm.TxInputsBuilder.new()
const hexCollateralUtxos = await api.getCollateral(3000000)
for (let i = 0; i < hexCollateralUtxos.length; i++) {
const wasmUtxo = CardanoWasm.TransactionUnspentOutput.from_bytes(utils.hexToBytes(hexCollateralUtxos[i]))
collateralTxInputsBuilder.add_input(wasmUtxo.output().address(), wasmUtxo.input(), wasmUtxo.output().amount())
}
txBuilder.set_collateral(collateralTxInputsBuilder)
txBuilder.calc_script_data_hash(CardanoWasm.TxBuilderConstants.plutus_default_cost_models())
// handle change
const changeAddress = await api.getChangeAddress()
const wasmChangeAddress = CardanoWasm.Address.from_bytes(utils.hexToBytes(changeAddress))
txBuilder.add_change_if_needed(wasmChangeAddress)
const wasmUnsignedTransaction = txBuilder.build_tx()
api.signTx(utils.bytesToHex(wasmUnsignedTransaction.to_bytes()))
.then((witnessHex) => {
const wasmWitnessSet = CardanoWasm.TransactionWitnessSet.from_bytes(utils.hexToBytes(witnessHex))
const signedTransaction = CardanoWasm.Transaction.new(wasmUnsignedTransaction.body(), wasmWitnessSet, wasmUnsignedTransaction.auxiliary_data())
signedTx = utils.bytesToHex(signedTransaction.to_bytes())
txHash = utils.bytesToHex(CardanoWasm.hash_transaction(wasmUnsignedTransaction.body()).to_bytes())
setOnScreenAlert(signedTx, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
.finally(() => {
txBuilder.free()
})
})
submitTxButton.addEventListener('click', () => {
checkApiAvailable()
if (!signedTx) {
setOnScreenAlert("Please Sign a Tx", "danger")
}
api.submitTx(signedTx)
.then((txId) => {
setOnScreenAlert(`Tx successfully submitted: ${txId}`, "success")
})
.catch((e) => {
console.log(e)
setOnScreenAlert(JSON.stringify(e), "danger")
})
})
const getTxBuilder = () => {
return CardanoWasm.TransactionBuilder.new(
CardanoWasm.TransactionBuilderConfigBuilder.new()
// all of these are taken from the mainnet genesis settings
// linear fee parameters (a*size + b)
.fee_algo(
CardanoWasm.LinearFee.new(
CardanoWasm.BigNum.from_str("44"),
CardanoWasm.BigNum.from_str("155381")
)
)
.coins_per_utxo_word(CardanoWasm.BigNum.from_str('34482'))
.pool_deposit(CardanoWasm.BigNum.from_str('500000000'))
.key_deposit(CardanoWasm.BigNum.from_str('2000000'))
.ex_unit_prices(CardanoWasm.ExUnitPrices.new(
CardanoWasm.UnitInterval.new(CardanoWasm.BigNum.from_str("577"), CardanoWasm.BigNum.from_str("10000")),
CardanoWasm.UnitInterval.new(CardanoWasm.BigNum.from_str("721"), CardanoWasm.BigNum.from_str("10000000"))
))
.max_value_size(5000)
.max_tx_size(16384)
.build()
);
}
const wasmMultiassetToJSONs = (wasmMultiasset) => {
let assetValue = []
const wasmScriptHashes = wasmMultiasset?.keys()
for (let i = 0; i < wasmScriptHashes?.len(); i++) {
const wasmAssets = wasmMultiasset.get(wasmScriptHashes.get(i))
const wasmAssetNames = wasmAssets.keys()
const assetsJSON = {}
for (let j = 0; j < wasmAssetNames.len(); j++) {
const wasmAssetName = wasmAssetNames.get(j)
const policyId = utils.bytesToHex(wasmScriptHashes.get(i).to_bytes())
const name = utils.bytesToHex(wasmAssetName.to_bytes())
assetsJSON[`${policyId}.${name}`] = wasmAssets.get(wasmAssetName).to_str()
}
assetValue.push(assetsJSON)
}
return assetValue
}
const checkApiAvailable = () => {
if (!api) {
setOnScreenAlert("Please request access", "danger")
throw "Access not available"
}
}
const setOnScreenAlert = (text, type) => {
onScreenAlert.className = `alert alert-${type} w-100 overflow-auto`
if (Array.isArray(text)) {
for (let i = 0; i < text.length; i++) {
text[i] += " \n"
}
}
onScreenAlert.textContent = text
}