Mixing
How to create a custom advertisedServices
I was looking at Corda Demobench and I was wondering how to create custom advertised services in a Cordapps.
The Demobench provide a lot of services for a node such as:
corda.notary.simple --> (simple notary)
corda.notary.validating --> (validating notary)
corda.intrest_rates --> (oracle service)
corda.issuer.CURRENCY
corda.cash
I believe the last two services are custom services that enable the nodes to provide special services like issue cash and use cash.
Please do correct me if I am wrong!
corda
asked Jan 10 '18 at 14:45
Paradox
538
add a comment |
I was looking at Corda Demobench and I was wondering how to create custom advertised services in a Cordapps.
The Demobench provide a lot of services for a node such as:
corda.notary.simple --> (simple notary)
corda.notary.validating --> (validating notary)
corda.intrest_rates --> (oracle service)
corda.issuer.CURRENCY
corda.cash
I believe the last two services are custom services that enable the nodes to provide special services like issue cash and use cash.
Please do correct me if I am wrong!
corda
asked Jan 10 '18 at 14:45
Paradox
538
add a comment |
I was looking at Corda Demobench and I was wondering how to create custom advertised services in a Cordapps.
The Demobench provide a lot of services for a node such as:
corda.notary.simple --> (simple notary)
corda.notary.validating --> (validating notary)
corda.intrest_rates --> (oracle service)
corda.issuer.CURRENCY
corda.cash
I believe the last two services are custom services that enable the nodes to provide special services like issue cash and use cash.
Please do correct me if I am wrong!
corda
asked Jan 10 '18 at 14:45
Paradox
538
I was looking at Corda Demobench and I was wondering how to create custom advertised services in a Cordapps.
The Demobench provide a lot of services for a node such as:
corda.notary.simple --> (simple notary)
corda.notary.validating --> (validating notary)
corda.intrest_rates --> (oracle service)
corda.issuer.CURRENCY
corda.cash
I believe the last two services are custom services that enable the nodes to provide special services like issue cash and use cash.
Please do correct me if I am wrong!
corda
corda
asked Jan 10 '18 at 14:45
Paradox
538
asked Jan 10 '18 at 14:45
Paradox
538
asked Jan 10 '18 at 14:45
Paradox
538
asked Jan 10 '18 at 14:45
Paradox
538
asked Jan 10 '18 at 14:45
Paradox
538
538
add a comment |
add a comment |
1 Answer
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Nodes can advertise a service by listing it in their node configuration file under extraAdvertisedServiceIds - see https://docs.corda.net/corda-configuration-file.html. You can also list the name of the service you wish to offer in the deployNodes task - see https://github.com/corda/corda/blob/release-V2/samples/irs-demo/build.gradle#L56.
However, Corda is moving away from looking up nodes based on the service they offer. In V2, there are no methods to retrieve a node based on the service it offers. In V3, the concept of services will be removed entirely.
If you check the Oracle Example here, you'll see that we look up the oracles by name, and not based on the fact that they offer a specific service.
answered Jan 10 '18 at 18:01
Joel
10.1k11228
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See thedeployNodestask here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has thebaseandoraclecordapps installed, while the other (non-oracle) nodes have thebaseandclientcordapps installed.
– Joel
Jan 12 '18 at 8:55
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
|
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Nodes can advertise a service by listing it in their node configuration file under extraAdvertisedServiceIds - see https://docs.corda.net/corda-configuration-file.html. You can also list the name of the service you wish to offer in the deployNodes task - see https://github.com/corda/corda/blob/release-V2/samples/irs-demo/build.gradle#L56.
However, Corda is moving away from looking up nodes based on the service they offer. In V2, there are no methods to retrieve a node based on the service it offers. In V3, the concept of services will be removed entirely.
If you check the Oracle Example here, you'll see that we look up the oracles by name, and not based on the fact that they offer a specific service.
answered Jan 10 '18 at 18:01
Joel
10.1k11228
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See thedeployNodestask here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has thebaseandoraclecordapps installed, while the other (non-oracle) nodes have thebaseandclientcordapps installed.
– Joel
Jan 12 '18 at 8:55
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
|
show 2 more comments
Nodes can advertise a service by listing it in their node configuration file under extraAdvertisedServiceIds - see https://docs.corda.net/corda-configuration-file.html. You can also list the name of the service you wish to offer in the deployNodes task - see https://github.com/corda/corda/blob/release-V2/samples/irs-demo/build.gradle#L56.
However, Corda is moving away from looking up nodes based on the service they offer. In V2, there are no methods to retrieve a node based on the service it offers. In V3, the concept of services will be removed entirely.
If you check the Oracle Example here, you'll see that we look up the oracles by name, and not based on the fact that they offer a specific service.
answered Jan 10 '18 at 18:01
Joel
10.1k11228
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See thedeployNodestask here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has thebaseandoraclecordapps installed, while the other (non-oracle) nodes have thebaseandclientcordapps installed.
– Joel
Jan 12 '18 at 8:55
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
|
show 2 more comments
Nodes can advertise a service by listing it in their node configuration file under extraAdvertisedServiceIds - see https://docs.corda.net/corda-configuration-file.html. You can also list the name of the service you wish to offer in the deployNodes task - see https://github.com/corda/corda/blob/release-V2/samples/irs-demo/build.gradle#L56.
However, Corda is moving away from looking up nodes based on the service they offer. In V2, there are no methods to retrieve a node based on the service it offers. In V3, the concept of services will be removed entirely.
If you check the Oracle Example here, you'll see that we look up the oracles by name, and not based on the fact that they offer a specific service.
answered Jan 10 '18 at 18:01
Joel
10.1k11228
Nodes can advertise a service by listing it in their node configuration file under extraAdvertisedServiceIds - see https://docs.corda.net/corda-configuration-file.html. You can also list the name of the service you wish to offer in the deployNodes task - see https://github.com/corda/corda/blob/release-V2/samples/irs-demo/build.gradle#L56.
However, Corda is moving away from looking up nodes based on the service they offer. In V2, there are no methods to retrieve a node based on the service it offers. In V3, the concept of services will be removed entirely.
If you check the Oracle Example here, you'll see that we look up the oracles by name, and not based on the fact that they offer a specific service.
answered Jan 10 '18 at 18:01
Joel
10.1k11228
edited Nov 19 '18 at 16:22
answered Jan 10 '18 at 18:01
Joel
10.1k11228
answered Jan 10 '18 at 18:01
Joel
10.1k11228
answered Jan 10 '18 at 18:01
Joel
10.1k11228
10.1k11228
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See thedeployNodestask here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has thebaseandoraclecordapps installed, while the other (non-oracle) nodes have thebaseandclientcordapps installed.
– Joel
Jan 12 '18 at 8:55
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
|
show 2 more comments
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See thedeployNodestask here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has thebaseandoraclecordapps installed, while the other (non-oracle) nodes have thebaseandclientcordapps installed.
– Joel
Jan 12 '18 at 8:55
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
If the concept of services would be removed then how can I ensure that only one single node would be able to issue assets and others would use them
– Paradox
Jan 11 '18 at 12:08
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
You could encode this constraint directly in the contract code or in the flows. Instead of identifying this issuer by their service, you'd identify them simply by name.
– Joel
Jan 11 '18 at 12:44
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
But if I create a constraint then those flows and contract would still be shown on the list. In CoradaDemobench you cant even see the flows in the node if you have not selected that service before initializing the node. Can you point me to some examples that would help me in implementing this?
– Paradox
Jan 12 '18 at 6:30
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See the
deployNodes task here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has the base and oracle cordapps installed, while the other (non-oracle) nodes have the base and client cordapps installed.– Joel
Jan 12 '18 at 8:55
You control which flows appear on which nodes simply by installing or not installing the CorDapp jar containing them on a node. See the
deployNodes task here for example: github.com/CaisR3/cordapp-optionv1/blob/master/build.gradle. The Oracle node has the base and oracle cordapps installed, while the other (non-oracle) nodes have the base and client cordapps installed.– Joel
Jan 12 '18 at 8:55
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
So let's say If I want to issue cash from node A and then use that cash in another node then how should I distribute the app so that the same state could be used between both the nodes
– Paradox
Jan 12 '18 at 15:08
|
show 2 more comments
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