NIP-100

Implementation of Bitcoin Token Interoperability Across Various DEXs

draft optional

The NIP defines the interoperability of Bitcoin Tokens, such as BRC20 tokens, among different DEXs (Decentralized Exchanges). DEXs utilizing this protocol enable the circulation of user order data among other DEXs using the same protocol, allowing for public display and cross-platform transactions. This enhances trading efficiency by increasing the exposure of user orders. The protocol was authored by the Orders.Exchange team.

Info

A Seller or Buyer can publish these events:

Kind		Description
60018	set_order	Create or update an order for product.
60019	take_order	Take a product and delete the order.
5	delete_order	Delete an order.

Event 60018: Create or update an order for product.

Event Content:

{
    "platform": <String, the name of platform which order come from>,
    "orderId": <String, ID of order, SHA256(seller_address_inscriptionId_amount)>,
    "sellerAddress": <String, address of seller>,
    "productType": <String, product type: ordinal/brc20>,
    "orderType": <int, sell-1,buy-2>
    "publicKey": <String, public key from seller, for verifying sign>
    "sign": <String, sign data with private key>
    "data": {
      "inscriptionId": <String, id of inscription>,
      "coinAmount": <int, amount of tick sold>,
      "amount": <int, btc value>,
      "psbtRawCreate": <String, psbt raw which seller create>
      }
}

Fields that are not self-explanatory:

• platform:

  • The name of the platform that relay the order

  • eg: "OrdersExchange"

• orderId:

  • The ID of order, SHA256(<seller_address>_<inscriptionId>_<amount>)

• data:

  • if productType is ordinal data Include fields：inscriptionId/amount/psbtRawCreate

  • if productType is brc20 data Include fields：inscriptionId/coinAmount/amount/psbtRawCreate

Event Tags:

  "tags": [
       ["d", <String, ID of order],
       ["t", <String (optional), product category],
       ["n", <String (optional), tick name or ordinal name],
       ...
    ]

• the d tag is required, its value MUST be the same as the orderId.

• the t tag is as searchable tag, it represents different categories that the product can be part of (ordinal, tick). Multiple t tags can be present.

Event 60019: Take a product and delete the order.

Event Content:

{
    "platform": <String, the name of platform which order come from>,
    "orderId": <String, ID of order, the same ID as the seller’s order which buyer would take>,
    "buyerAddress": <String, address of buyer>,
    "productType": <String, product type: ordinal/brc20>,
    "orderType": <int, sell-1,buy-2>
    "data": {
      "inscriptionId": <String, id of inscription>,
      "psbtRawCreate": <String, psbt raw which seller create>,
      "psbtRawFinal": <String, final psbt raw from buyer>,
      "txId": <String, txId from final psbt, which had been broadcasted>
      }
}

Fields that are not self-explanatory:

• platform:

  • The name of the platform that relay the order

  • eg: "OrdersExchange"

• orderId:

  • The ID of order, from Event 60018

• data:

  • if productType is ordinal data Include fields：inscriptionId/amount/psbtRawCreate/psbtRawFinal/txId

  • if productType is brc20 data Include fields：inscriptionId/coinAmount/amount/psbtRawCreate/psbtRawFinal/txId

Event Tags:

  "tags": [
       ["d", <String, ID of order],
       ["t", <String (optional), product category],
       ["n", <String (optional), tick name or ordinal name],
       ...
    ]

• the d tag is required, its value MUST be the same as the orderId.

• the t tag is as searchable tag, it represents different categories that the product can be part of (ordinal, tick). Multiple t tags can be present.

Process

Message Type	Sent By	Description
0	Seller	New Order
1	Buyer	Pay for Order
2	Seller	Update Order

Step 1: seller create an order (event)

Create an order event from Seller

data include:

• inscriptionId id of inscription

• coinAmount amount of tick sold

• amount btc value

• psbtRawCreate psbt raw from seller who created it

{
    "platform": <String, the name of platform which order come from>,
    "orderId": <String, ID of order, SHA256(seller_address_inscriptionId_amount)>,
    "sellerAddress": <String, address of seller>,
    "productType": <String, product type: ordinal/brc20>,
    "orderType": <int, sell-1,buy-2>
    "publicKey": <String, public key from seller, for verifying sign>
    "sign": <String, sign data with private key>
    "data": {
      "inscriptionId": <String, id of inscription>,
      "coinAmount": <int, amount of tick sold>,
      "amount": <int, btc value>,
      "psbtRawCreate": <String, psbt raw which seller create>
      }
}

Step 2: buyer pay for order (event)

When buyer see orders and select one, then take it and make final psbt. Broadcast psbt tx at last.

data include:

• inscriptionId id of inscription

• psbtRawCreate psbt raw from seller who created it

• psbtRawFinal final psbt raw from buyer

• txId bitcoin txId

{
    "platform": <String, the name of platform which order come from>,
    "orderId": <String, ID of order, the same ID as the seller’s order which buyer would take>,
    "buyerAddress": <String, address of buyer>,
    "productType": <String, product type: ordinal/brc20>,
    "orderType": <int, sell-1,buy-2>
    "data": {
      "inscriptionId": <String, id of inscription>,
      "psbtRawCreate": <String, psbt raw which seller create>,
      "psbtRawFinal": <String, final psbt raw from buyer>,
      "txId": <String, txId from final psbt, which had been broadcasted>
      }
}

Step other: seller Update Order or Delete Order (event)

Delete order by seller

{
    "platform": <String, the name of platform which order come from>,
    "orderId": <String, ID of order, the same ID as the seller’s own order>,
    "sellerAddress": <String, address of seller>,
    "publicKey": <String, public key from seller, for verifying sign>,
    "sign": <String, sign data with private key>,
    "data": {
      "inscriptionId": <String, id of inscription>
      }
}