28 lines
1.0 KiB
ReStructuredText
28 lines
1.0 KiB
ReStructuredText
Transactional Semantics
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=======================
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In `Using
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Tendermint <./using-tendermint.html#broadcast-api>`__ we
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discussed different API endpoints for sending transactions and
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differences between them.
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What we have not yet covered is transactional semantics.
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When you send a transaction using one of the available methods, it
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first goes to the mempool. Currently, it does not provide strong
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guarantees like "if the transaction were accepted, it would be
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eventually included in a block (given CheckTx passes)."
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For instance a tx could enter the mempool, but before it can be sent
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to peers the node crashes.
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We are planning to provide such guarantees by using a WAL and
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replaying transactions (See
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`GH#248 <https://github.com/tendermint/tendermint/issues/248>`__), but
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it's non-trivial to do this all efficiently.
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The temporary solution is for clients to monitor the node and resubmit
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transaction(s) or/and send them to more nodes at once, so the
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probability of all of them crashing at the same time and losing the
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msg decreases substantially.
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