# Worldchain

Source: https://developers.bitgo.com/docs/world

## Overview

World Chain is a cutting-edge blockchain infrastructure developed as part of the Worldcoin project, which aims to create a global digital currency that is equitable and accessible. The primary goal of World Chain is to bridge the gap between traditional finance and the emerging world of cryptocurrencies, offering a seamless platform for users to engage in various financial activities. This infrastructure supports a wide range of services, including payments, remittances, and decentralized applications (dApps).

## Explorer

<a href="https://worldscan.org/" target="_blank" rel="noreferrer">https://worldscan.org/</a>

## Wallets Types

BitGo enables holding Worldchain in the following wallet types:

|                  | Multisig Cold | Multisig Hot | MPC Cold | MPC Hot |
| ---------------- | ------------- | ------------ | -------- | ------- |
| **Custody**      | ❌            | ❌            | ✅       | ❌      |
| **Self-Custody** | ❌            | ❌            | ✅       | ✅      |

## Ticker Symbols

| Mainnet   | Testnet  |
| --------- | -------  |
| world     | tworld   |

## Faucet

You can use a faucet to obtain free testnet Worldchain for development and testing purposes.

**Faucet:** <a href="https://www.alchemy.com/faucets/world-chain-sepolia" target="_blank" rel="noreferrer">https://www.alchemy.com/faucets/world-chain-sepolia</a>


## Units

Each world consists of `1,000,000,000,000,000,000` (<code>10<sup>18</sup></code>) wei, so not even a single world can be stored numerically without exceeding the range of JavaScript numbers. Gas fees use gwei.

- 1 world = <code>10<sup>18</sup></code> wei
- 1 wei = <code>10<sup>-18</sup></code> world
- 1 gwei = <code>10<sup>-9</sup></code> world

For that reason, only string balance properties are available, which are `balanceString`, `confirmedBalanceString`, and
`spendableBalanceString`.

## Tokens

The Worldchain natively supports ERC20 tokens.

## Create Wallet

```shell cURL
export BITGO_EXPRESS_HOST="<YOUR_LOCALHOST>"
export COIN="tworld"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export LABEL="<DESIRED_WALLET_NAME>"
export PASSPHRASE="<YOUR_BITGO_LOGIN_PASSPHRASE>"
export ENTERPRISE_ID="<YOUR_ENTERPRISE_ID>"

curl -X POST \
 http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/generate \
 -H 'Content-Type: application/json' \
 -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "label": "'"$LABEL"'",
    "passphrase": "'"$PASSPHRASE"'",
    "enterprise": "'"$ENTERPRISE_ID"'",
    "walletVersion": 4
}'
```
```js JavaScript
bitgo
  .coin('tworld')
  .wallets()
  .generateWallet({
    label: 'My Test Wallet',
    passphrase: 'secretpassphrase1a5df8380e0e30',
    enterprise: '5612c2beeecf83610b621b90964448cd',
    walletVersion: 4,
  })
  .then(function (wallet) {
    // print the new wallet
    console.dir(wallet);
  });
```
## Create Address
```shell cURL
export WALLET="585c51a5df8380e0e3082e46"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"

curl -X POST \
-H "Authorization: Bearer $ACCESS_TOKEN" \
https://app.bitgo-test.com/api/v2/tworld/wallet/$WALLET/address

```
```js JavaScript
bitgo
  .coin('tworld')
  .wallets()
  .getWallet({ id: '585c51a5df8380e0e3082e46' })
  .then(function (wallet) {
    return wallet.createAddress();
  })
  .then(function (newAddress) {
    // print new address details
    console.dir(newAddress);
  });
```
## Consolidate Balance
Consolidation Fee Source: Worldchain Gas Tank
Worldchain uses forwarders, so it does not support manual consolidation
## Estimate Fee
```shell cURL
export COIN="tworld"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"

curl -X GET \
 https://app.bitgo-test.com/api/v2/$COIN/tx/fee \
 -H 'Content-Type: application/json' \
 -H "Authorization: Bearer $ACCESS_TOKEN"

```
```js JavaScript
const BitGoJS = require('../../../src/index.js');
const bitgo = new BitGoJS.BitGo({ env: 'test' });
const accessToken = '<YOUR_ACCESS_TOKEN>';
const coin = 'tworld';
async function getFeeEstimate() {
  try {
    await bitgo.authenticateWithAccessToken({ accessToken });
    const res = await bitgo.coin(coin).feeEstimate({ numBlocks: 2 });
    console.dir(res);
  } catch (err) {
    console.error('Error fetching fee estimate:', err);
  }
}
getFeeEstimate();
```
## Transact
Withdrawal Fee Source: Wallet Base Address
```shell cURL
export BITGO_EXPRESS_HOST="<YOUR_LOCALHOST>"
export COIN="tworld"
export WALLET_ID="<YOUR_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export ADDRESS="<DESTINATION_ADDRESS>"
export AMOUNT="<AMOUNT_IN_BASE_UNITS>"
export WALLET_PASSPHRASE="<YOUR_WALLET_PASSPHRASE>"

curl -X POST \
 http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/$WALLET_ID/sendcoins \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "address": "'"$ADDRESS"'",
    "amount": "'"$AMOUNT"'",
    "walletPassphrase": "'"$WALLET_PASSPHRASE"'"
}'
```
```shell cURL (send to many)
export BITGO_EXPRESS_HOST="<YOUR_LOCALHOST>"
export COIN="tworld"
export WALLET_ID="<YOUR_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export ADDRESS_1="<DESTINATION_ADDRESS_1>"
export AMOUNT_1="<AMOUNT_1_IN_BASE_UNITS>"
export WALLET_PASSPHRASE="<YOUR_WALLET_PASSPHRASE>"
curl -X POST \
  http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/$WALLET_ID/sendmany \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "recipients": [
    {
      "address": "'"$ADDRESS_1"'",
      "amount": "'"$AMOUNT_1"'"
    }
  ],
    "walletPassphrase": "'"$WALLET_PASSPHRASE"'"
}'
```
```js JavaScript
const tx = await fundedWallet.send({
    address: `<DESTINATION_ADDRESS>`,
    amount: `<AMOUNT>`,
    walletPassphrase: process.env.PASSWORD as string,
  });
```
```js JavaScript (send to many)
let params = {
  recipients: [
    {
      amount: "<AMOUNT_1>",
      address: "<DESTINATION_ADDRESS_1>",
    }
  ],
  walletPassphrase: "<YOUR_WALLET_PASSPHRASE>",
};
wallet.sendMany(params).then(function (transaction) {
  // Print transaction details
  console.dir(transaction);
});
```

## Stake

Staking is out of scope for these chains as they don’t have native support for them.

## See Also
- [Create MPC Wallets](/docs/wallets-create-mpc-keys)
- [Trading Overview](/docs/trade-overview)
- [Withdraw from Wallet - Custody MPC](/docs/withdraw-wallet-type-custody-mpc)
- [Withdraw from Wallet - Self-Custody MPC (Manual)](/docs/withdraw-wallet-type-self-custody-mpc-manual)
- [Withdraw from Wallet - Self-Custody MPC (Simple)](/docs/withdraw-wallet-type-self-custody-mpc-simple)