# Zcash

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

## Zcash

BitGo supports transparent transactions with the latest Zcash network upgrade, Sapling. This means BitGo only generates
and reads Sapling compatible transactions. To sign Sapling transactions, BitGo SDK version 9.2.0 or
greater is required.

Zcash can be accessed with the following coin types:

| Environment      | Coin Type | Faucet                                                                                                       |
| :--------------- | :-------- | :----------------------------------------------------------------------------------------------------------- |
| Zcash Production | zec       |                                                                                                              |
| Zcash Testnet    | tzec      | <a href="https://zecfaucet.com/" target="_blank" rel="noreferrer">https://zecfaucet.com/</a>                 |

### Notes on shielded transactions

BitGo wallets support only transparent addresses, which limits the type of transactions allowed. A Zcash BitGo
wallet can receive assets from a transparent or a shielded address but can only send assets to a transparent address.

### Explorer
<a href="https://blockexplorer.one/zcash/mainnet" target="_blank" rel="noreferrer">https://blockexplorer.one/zcash/mainnet</a>

### Dust Threshold

A dust threshold is the minimum amount of Zcash that you can create in a single output. Zcash has a dust threshold of 2730 zatoshis.

### Generating wallets

```javascript
bitgo
  .coin('tzec')
  .wallets()
  .generateWallet({
    label: 'My Test Wallet',
    passphrase: 'secretpassphrase1a5df8380e0e30',
  })
  .then(function (wallet) {
    // print the new wallet
    console.dir(wallet);
  });
```
```shell
LABEL="My Test Wallet"
PASSPHRASE="secretpassphrase1a5df8380e0e30"

curl -X POST \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $ACCESS_TOKEN" \
-d "{ \"label\": \"$LABEL\", \"passphrase\": \"$PASSPHRASE\" }" \
http://$BITGO_EXPRESS_HOST/api/v2/tzec/wallet/generate
```

### Creating addresses

```javascript
bitgo
  .coin('tzec')
  .wallets()
  .getWallet({ id: '585c51a5df8380e0e3082e46' })
  .then(function (wallet) {
    return wallet.createAddress();
  })
  .then(function (newAddress) {
    // print new address details
    console.dir(newAddress);
  });
```
```shell
WALLET=585c51a5df8380e0e3082e46

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

> 📘 **Note:** To view all supported address types and chain codes, see [UTXO Address Types](/docs/utxo-address-types). Zcash defaults to chain 0 and doesn't support SegWit address types.

### Balances

Zec (ZEC) is the native asset of the Zcash blockchain. The base unit of ZEC is zatoshi:

- 1 zatoshi is (<code>10<sup>-8</sup></code>) or 0.00000001 Zec.
- 1 ZEC is (<code>10<sup>8</sup></code>) or 100000000 zatoshis (100 million).

BitGo supports balances in string and number format but recommends string to ensure values do not exceed the
programmable number limit: `balanceString`, `confirmedBalanceString`, and `spendableBalanceString`.

### Sending Transactions using BitGoJS or BitGo Express

Zcash blockchain parameters update with each hard fork, and this means you need an updated version of BitGoJS or BitGo Express to successfully sign and send transactions using the new blockchain parameters.

For the current Zcash blockchain parameters, the minimum supported versions for sending Zcash are BitGoJS 9.2.0 or
greater, and BitGo Express 9.2.0 or greater.

If BitGo detects an SDK version that does not support the current blockchain parameters, it returns an `UnsupportedSdkVersion` error
when attempting to build or send transactions.