Wallet Integration with Fractal

This document is intended for wallet application providers that have already integrated the BTC mainnet, to facilitate the integration of the Fractal testnet into their applications.

Node

Fractal Bitcoin and Bitcoin have the following differences and notes on nodes:

• Solo mining uses the same mechanism as Bitcoin.

• Merged mining operates similarly to Namecoin.

• Blocks from merged mining contain the BTC block header data. The data structure has changed.https://en.bitcoin.it/wiki/Merged_mining_specification

• However, to maintain compatibility with existing applications, the block data will be removed in the getblock and getblockheader methods of the RPC interface. Nevertheless, analyzing local block files will reveal this data.

Protocol

We remain neutral regarding the competition of different protocols.

Ordinals

• The activation height of the ordinals index is 21000.

BRC20

• Ticker names on this public testnet will be limited to 6 - 12 bytes. Tickers with 4 or 5 characters will not be permitted, as they are already in use on the Bitcoin mainnet.

• For brc-20 on Fractal, ticker names can include letters (both uppercase and lowercase: a-z/A-Z), numbers (0-9), and underscores (_). In total, you have 63 different characters to work with.

• All byte lengths of BRC-20s on Fractal can enable the self_mint field.

Runes Protocol

• The activation height for runes is 84000.

• More rules will be announced later.

RPC & API

Mempool API

• https://mempool-testnet.fractalbitcoin.io/v1/fees/recommended
• The latest official version of Mempool can be used for deployment and operation.

Ord

• https://ordinals-testnet.fractalbitcoin.io
• Use the latest official version of Ord, configure ordinals to the activation height of 21000.

UniSat Open API

• API Swagger: https://open-api-fractal.unisat.io/swagger.html
• How to get API-KEY: https://developer.unisat.io/dashboard/fractal/testnet
• Endpoint: https://open-api-fractal-testnet.unisat.io