Questions tagged [events]
Questions that relate to pallets and disptachables that emit specific events, including decoding events.
9
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How to identify received contract event?
My contract emits several [ink(event)] events. My application subscribes to the events and receives Contracts_ContractEmitted data (from centrifuge go-substrate-rpc-client). How may I understand which ...
- 193
7
votes
2
answers
340
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How to decode ink smart contract call and event data?
I want to decode the contract call data and event data saved in a block. How can I do that?
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6
votes
2
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117
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How to parse/match a specific frame_system event?
From the following function I can read the frame_system events:
let events = frame_system::Pallet::<T>::read_events_no_consensus();
the above provides me the following example array:
...
- 682
5
votes
2
answers
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Large event payloads unsafe?
Premise
Substrate will, by default, store every event in a block in a storage value Event of type Vec<EventRecord> in the system module, which involves reading & writing this full vector ...
- 451
3
votes
1
answer
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How to filter the subscribed contracts events with their topics?
I need to subscribe to my smart-contract events (#[ink(event)]). So I state_subscribeStorage to "System.Events" storage key. But then I get all system events of all smart contracts in my ...
- 193
3
votes
1
answer
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Problem running assert_last_event in tests.rs
As the title suggests, I've been trying to call assert_last_event on the tests.rs class without success. The problem first happened when developing the kitties tutorial and after several toolchain ...
- 55
2
votes
1
answer
137
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Emit Events from hooks like on_initialize()
Is it okay to emit event from hooks like on_initialize()?
For example, I have ~1000 items in storage and in a loop in on_initialize() I want to emit an event if certain process is completed, then is ...
- 111
2
votes
2
answers
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Why are events stored?
The documentation around emitting events states that events are written to storage, and then cleared next block.
This has considerable costs
You add extra db write/read overhead to practically every ...
- 451
2
votes
1
answer
115
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What does the Staking.EraPaid event mean?
According to Polkadot's events description page, the Staking.EraPaid event means the following:
The era payout has been set; the first balance is the validator-payout; the second is the remainder ...
