Anchor Mode / Block Type

In the examples above, we used AnchorMode.Any to indicate that the transaction can be "mined" in different ways. Stacks has two types of blocks: microblocks and (anchor) blocks.

  • Microblocks (off-chain) are faster, but less reliable. Microblocks can be confirmed quickly but are not final until the microblock is included in an anchor block.
  • Anchor Blocks (on-chain) are the normal Stacks blocks. They are slower, but more reliable. Anchor blocks are final and cannot be reverted.
PropTypeDefault
anchorMode
offChainOnly" | "onChainOnly" | "any"
any

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