> For the complete documentation index, see [llms.txt](https://thxnet.gitbook.io/thxnet-developers-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://thxnet.gitbook.io/thxnet-developers-doc/reference/thxnet.-api/blockchain-networks-ids.md).

# Blockchain Networks' IDs

> A.k.a. BN ID

The identifiers of the blockchain networks in THXNET. are represented in an enumeration form.

```
MAINNET_ROOTCHAIN
TESTNET_ROOTCHAIN
MAINNET_LEAFCHAIN_THX
TESTNET_LEAFCHAIN_THX
MAINNET_LEAFCHAIN_LMT
TESTNET_LEAFCHAIN_LMT
MAINNET_LEAFCHAIN_TXD
TESTNET_LEAFCHAIN_TXD
TESTNET_LEAFCHAIN_SAND // TESTNET_LEAFCHAIN_SANDBOX
```

To specify the blockchain network in a URL, it must be turned into lower case, for example: `testnet_leafchain_sand`

And if the blockchain network is specified in HTTP header, then it can be both upper case or lower case.

### Example

#### URL (set the \<BN\_ID>)

`https://api.helpers.testnet.thxnet.org/rest/v0/my_id_wallet/testnet_leafchain_sand/ft`

`https://api.helpers.testnet.thxnet.org/rest/v0/my_id_wallet/testnet_leafchain_txd/ft`

#### HTTP Header

`THXNET-Blockchain-Network: TESTNET_LEAFCHAIN_SAND`

`THXNET-Blockchain-Network: TESTNET_LEAFCHAIN_THX`


---

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