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Adds a caveat regarding the inability to record a transaction twice.

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Joel Dudley 2017-12-21 14:42:18 +00:00 committed by GitHub
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docs/source/tutorial-observer-nodes.rst
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@ -35,8 +35,14 @@ the transaction to the regulator. There are two important aspects to note here:
If the states define a relational mapping (see :doc:`api-persistence`) then the regulator will be able to query the
reports from their database and observe new transactions coming in via RPC.
.. warning:: Nodes which act as both observers and which directly take part in the ledger are not supported at this
time. In particular, coin selection may return states which you do not have the private keys to be able to sign
for. Future versions of Corda may address this issue, but for now, if you wish to both participate in the ledger
and also observe transactions that you can't sign for you will need to run two nodes and have two separate
identities.
Caveats
-------
* Nodes which act as both observers and direct participants in the ledger are not supported at this time. In
particular, coin selection may return states which you do not have the private keys to be able to sign for. Future
versions of Corda may address this issue, but for now, if you wish to both participate in the ledger and also observe
transactions that you can't sign for you will need to run two nodes and have two separate identities
* Nodes only record each transaction once. If a node has already recorded a transaction in non-observer mode, it cannot
later re-record the same transaction as an observer. This issue is tracked here:
https://r3-cev.atlassian.net/browse/CORDA-883