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@ -19,7 +19,7 @@ still inheriting the security of Bitcoin. |
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## Transaction states |
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## Transaction states |
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The Stacks block production model is described in [SIP-001][]. The standard outlines the mechanism by which elected |
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The [Stacks block production model][] is described in SIP-001. The standard outlines the mechanism by which elected |
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block leaders can produce blocks on the Stacks blockchain either by batching transactions or by streaming them. |
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block leaders can produce blocks on the Stacks blockchain either by batching transactions or by streaming them. |
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Microblocks are the product of the streaming model. |
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Microblocks are the product of the streaming model. |
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@ -28,9 +28,13 @@ into microblocks during the current epoch. Transactions included in microblocks |
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been confirmed by an anchor block, but can be assumed to be highly likely to achieve finality in the order in which the leader |
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been confirmed by an anchor block, but can be assumed to be highly likely to achieve finality in the order in which the leader |
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packaged them. |
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packaged them. |
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While there is a high degree of confidence that streamed blocks are finalized in the order in which a block leader |
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A primary feature of any blockchain is that it can be reordered by the miners in order to avoid malicious actors in the |
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selects them, there is still a chance that microblocks can be reorganized in an anchor block. The processing order of |
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mining pool. Because of this reordering ability, any transaction (whether it is included in an anchor block or a |
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transactions in microblocks can change depending on on how the microblock is finalized in the anchor block. |
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microblock) is subject to potential reordering. As more blocks are added to the chain, the likelihood of a transaction |
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being reordered decreases. For example, many exchanges wait until at least 3 Bitcoin blocks have been added to report |
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a transaction as fully confirmed. This would be known as a 3 block confirmation. Microblocks provide between a 0-1 block |
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confirmation. A transaction that has been included in a microblock is likely to remain in that order, and the order of |
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the transaction is known (unlike a transaction in mempool). |
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-> If a transaction is dependent on a chain state that could by altered by previous transactions with serious |
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-> If a transaction is dependent on a chain state that could by altered by previous transactions with serious |
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implications, you should carefully consider whether it should be performed using microblocks. |
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implications, you should carefully consider whether it should be performed using microblocks. |
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@ -88,7 +92,7 @@ The state of microblock transactions should be carefully communicated to users. |
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included in an anchor block, and your application design should reflect this. |
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included in an anchor block, and your application design should reflect this. |
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[proof-of-transfer consensus mechanism]: /understand-stacks/proof-of-transfer |
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[proof-of-transfer consensus mechanism]: /understand-stacks/proof-of-transfer |
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[sip-001]: https://github.com/stacksgov/sips/blob/main/sips/sip-001/sip-001-burn-election.md#operation-as-a-leader |
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[stacks block production model]: https://github.com/stacksgov/sips/blob/main/sips/sip-001/sip-001-burn-election.md#operation-as-a-leader |
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[mining microblocks]: /understand-stacks/mining#microblocks |
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[mining microblocks]: /understand-stacks/mining#microblocks |
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[anchor mode]: /understand-stacks/transactions#anchor-mode |
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[anchor mode]: /understand-stacks/transactions#anchor-mode |
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[anchormode]: https://stacks-js-git-master-blockstack.vercel.app/enums/transactions.anchormode.html |
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[anchormode]: https://stacks-js-git-master-blockstack.vercel.app/enums/transactions.anchormode.html |
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