This article is from cointelegraph.com.br and the original article can be read here in Portuguese
Through a decision of the Chamber of Foreign Trade of the Ministry of Economy published this Tuesday (10) in the Official Gazette of the Union (DOU), the Federal government zeroed the collection of import rate of equipment used in Bitcoin (BTC) mining.
Changes to zero percent the rates of Import Tax levied on Computer and Telecommunications Goods that it mentions, in the condition of ex-tariff, says Resolution GECEX No. 339.
The equipment responsible for the mining activity and working with the SHA-256 algorithm are specified in item 34 of annex 2 of the Resolution:
Servers dedicated to SHA256 algorithm cryptocurrency mining, with energy efficiency measured at 25 degrees Celsius equal to or less than 32 J/TH (joules/terahash).
SHA-256 is an algorithm created by the US National Security Agency (NSA) which condenses any sequence of characters of any length into a 256-bit hash, a sequence of numbers.
As the hash is randomly defined, the challenge for miners is precisely to discover the combination of characters responsible for creating a given hash by placing each guess in SHA-256 to verify the hash output.
In the case of hitting and unlocking the next block of the blockchain, a new Bitcoin will have been created. Regarding the difficulty, the software is adjusted in its difficulty level to extract a new block every 10 minutes.
At the beginning of April, the Federal Government also zeroed the collection of import tax until 2025 for Bitcoin wallets, such as ledger and the Trezor, as reported by the Cointelegraph Brazil.