Blockchains
Blockchain module is a main module to connect your systems (smart contracts,etc) to real blockchains It can be read-only mode where you do not connect any wallet to blockchain or read-write mode where you selected wallet to connect
You can check your balances here and top up it. For testnets you can use faucet service to topup testnet balances
As well you can transfer your balances
caution
Wallet can be attached to multiple blockchains. But combination - blockchain driver + wallet is unique
As for 2023 Atttarius support a lot of EVM based chains and as well NEAR and Aptos