Start here: How Bitcoin works
Follow one payment from a wallet to confirmations before choosing a deeper path.
Follow these 4 lessons in order, or choose the topic you need. Each lesson combines an explanation, a worked example and practice inside the Guild.
How Bitcoin works
Follow one payment from Alice's wallet to Bob, through independent node checks, a miner's candidate block, and confirmations.
Open lessonTransactions, outputs, locks, keys, and addresses
Build one payment from spendable outputs and follow how an address becomes a locking script, a key authorizes an input, and change becomes a new output.
Open lessonBlocks, mining, difficulty, and validation
See how a candidate block is assembled, how proof of work is found, how difficulty is encoded, and why full nodes still decide whether the block is valid.
Open lessonFull nodes, the blockchain, and reorgs
Connect peer messages, mempool, block index, chainstate, most-work selection, confirmations, and temporary reorganizations into one full-node view.
Open lesson