## Archival Nodes

| Endpoint | Country |
| -------- | -------- |
| wss://a1.calamari.systems | UK |
| wss://a2.calamari.systems | US |
| wss://avocado.calamari.systems | UK |
| wss://fritti.calamari.systems | Japan |

## The block includes 1st private tx
Block number:

https://calamari.subscan.io/block/3190993

Basically, you can start to scan blocks from `3190993 `.

## Tokens

| Token Name | Asset Id | Decimal |
| -------- | -------- | -------- |
| KMA | 1 | 12 |
| KAR | 8 | 12 |
| MOVR | 11 | 18 |
| KSM | 12 | 12 |
| USDT | 14 | 6 |
| USDC | 16 | 6 |
| DAI | 15 | 18 |

## How to decode

### The metadata from mantapay
- Module name

mantaPay

- Event name

- `ToPrivate`: public token to private token
Two fields in this event:
- `asset`: contains asset id, how many token will be `ToPrivate`ed.
- `source`: signer

If `ToPrivate` is detected, you can decode it in this way.

        const [asset, signer] = event.data;
        const assetId = decodeAssetId(asset.toJSON().valueOf()['id']);
        const amount = toUnit(decodeAssetValue(asset.toJSON().valueOf()['value']), assetId).toNumber();

- `PrivateTransfer`: private token to private token,
Only one field in this event, no one knows how many tokens is transfered:
- `origin`: signer

If `PrivateTransfer` is detected, you can decode it in this way.

        const [signer] = event.data;

- `ToPublic`: private token to public token
Two fields in this event:
- `asset`: contains asset id, how many token will be `ToPublic`ed.
- `sink`: signer

If `ToPublic` is detected, you can decode it in this way.

        const [asset, signer] = event.data;
        const assetId = decodeAssetId(asset.toJSON().valueOf()['id']);
        const amount = toUnit(decodeAssetValue(asset.toJSON().valueOf()['value']), assetId).toNumber();

- Utility Functions

function decodeAssetValue(hexString: string) {
  const array = hexToU8a(hexString);
  const value = u8aToBn(array);
  return value;
}

function toUnit(balance: BN, assetId: number) {
  const decimal = todo!(); // get decimal by asset id.
  const b = new BigNumber(decimal.toString());
  const c = a.div(b);
  return c;
}

function decodeAssetId(assetId: string) {
  const array = hexToU8a(assetId);
  const value = u8aToBn(array);
  return value.toNumber();
}