const { Block, Transaction, Header } = require('bsv-minimal')

const block = Block.fromBuffer(yourBlockBuffer)
block.getHash()
block.getTransactions()
block.getHeight()
await block.getTransactionsAsync(({ header, txs, finished }), => {
    for (const {index, tx, offset, size} of txs) {
        console.log(`tx ${tx.getTxid()}`)
    }
})

const header = Header.fromBuffer(yourHeaderBuffer)
header.getHash()

const transaction = Transaction.fromBuffer(yourTransactionBuffer)
transaction.getTxid()
transaction.getCoinbaseHeight()