Slipstream: Ebb-and-Flow Consensus on a DAG with Fast Confirmation for UTXO Transactions
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866912339671908352 |
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| author | Polyanskii, Nikita Muller, Sebastian Raikwar, Mayank |
| author_facet | Polyanskii, Nikita Muller, Sebastian Raikwar, Mayank |
| contents | This paper introduces Slipstream, a Byzantine Fault Tolerance (BFT) protocol where nodes concurrently propose blocks to be added to a Directed Acyclic Graph (DAG) and aim to agree on block ordering. Slipstream offers two types of block orderings: an optimistic ordering, which is live and secure in a sleepy model under up to 50% Byzantine nodes, and a final ordering, which is a prefix of the optimistic ordering and ensures safety and liveness in an eventual lock-step synchronous model under up to 33% Byzantine nodes. Additionally, Slipstream integrates a payment system that allows for fast UTXO transaction confirmation independently of block ordering. Transactions are confirmed in three rounds during synchrony, and unconfirmed double spends are resolved in a novel way using the DAG structure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_14876 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Slipstream: Ebb-and-Flow Consensus on a DAG with Fast Confirmation for UTXO Transactions Polyanskii, Nikita Muller, Sebastian Raikwar, Mayank Distributed, Parallel, and Cluster Computing Data Structures and Algorithms This paper introduces Slipstream, a Byzantine Fault Tolerance (BFT) protocol where nodes concurrently propose blocks to be added to a Directed Acyclic Graph (DAG) and aim to agree on block ordering. Slipstream offers two types of block orderings: an optimistic ordering, which is live and secure in a sleepy model under up to 50% Byzantine nodes, and a final ordering, which is a prefix of the optimistic ordering and ensures safety and liveness in an eventual lock-step synchronous model under up to 33% Byzantine nodes. Additionally, Slipstream integrates a payment system that allows for fast UTXO transaction confirmation independently of block ordering. Transactions are confirmed in three rounds during synchrony, and unconfirmed double spends are resolved in a novel way using the DAG structure. |
| title | Slipstream: Ebb-and-Flow Consensus on a DAG with Fast Confirmation for UTXO Transactions |
| topic | Distributed, Parallel, and Cluster Computing Data Structures and Algorithms |
| url | https://arxiv.org/abs/2410.14876 |