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BUIDL refers to build and means that the focus should be on building the project, instead of making a quick gain. BUIDL is wrongly written, just as HODL (the slang that existed before BUIDL). 

Blockchain is a decentralized and digitalized distributed ledger using cryptography. It is the technology that underpins cryptocurrencies. The blocks store information about transactions, each block in the blockchain contains a cryptographic hash of the previous block, a timestamp and transaction data. Each transaction that is added to a blockchain is validated (through a decentralized network

Wei is the smallest unit or base unit of Ether, it’s 1×10–18 ETH. Wei is named after Wei Dai (a big supporter of the use of strong cryptography).

Testnet is the environment of a blockchain in which test can be carried out. Once a project has been tested in this environment and is ready to go live, it gets launched on mainnet.

Solidity is the most used high-level language to develop smart contracts on the Ethereum blockchain. It is compiled in the EVM (Ethereum Virtual Machine) into bytecode, so other blockchain implementing the EVM will understand Solidity as well.

A soft fork if an update in the software of the client running a blockchain that makes some of the previous blocks/transactions invalid. It is compatible with previous versions, so it does not create a new coin on a different blockchain like in a hardfork.

A smart contract is a piece of code that defines how an address should behave given different inputs. Smart contracts make it possible to carry out transactions without third parties involved. The transactions made through smart contracts are trackable and irreversible.

A sidechain is different blockchain that runs in parallel and is linked to the parent chain, using a two-way peg. The two-way peg makes it possible to interchange assets for a predetermined rate between the main chain and the sidechain.

A public blockchain is a blockchain is transparent and open to the public. Decisions in public blockchains are made by consensus mechanisms such as Proof of Work and Proof of Stake. An example of a public blockchain is Bitcoin.

When a wallet is created, the owner get a private and a public key. The public key allows someone to receive cryptocurrencies in his or her wallet, and the private key is needed to authorize transactions. The public address is a long piece of code, that is why it is compressed to a 26-35 alphanumeric