Ideas in this flowchart

• Transaction acceptance, blockchain confirmation, and chain consensus
• A transaction may be accepted before final confirmation
• Merchants may accept the transaction
• Payment processors temporarily bear the risk
• The risk concerns possible non-confirmation
• The underlying blockchain process still requires miner inclusion
• Miners include the transaction in a block
• The block must be valid
• The protocol delays spending newly awarded bitcoins
• Ninety-nine additional blocks must be added
• The delay gives the network time to develop consensus
• The network develops strong consensus about the original block
• Are two blocks found at nearly the same time?
• The network chooses one chain to continue
• The selected chain continues
• The other block becomes orphaned
• The orphaned block's reward is invalidated