Add support for custom action #483
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state/src/item/cache.rs
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| impl CacheableItem for Bytes { | ||
| type Address = H256; | ||
| fn is_null(&self) -> bool { | ||
| self.len() == 0 |
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codechain/config/chain_type.rs
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| impl ChainType { | ||
| pub fn spec<'a>(&self) -> Result<Spec, String> { | ||
| pub fn spec<'a>(&self, handlers: &[Arc<ActionHandler>]) -> Result<Spec, String> { |
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core/src/spec/spec.rs
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| /// Load from JSON object. | ||
| fn load_from(s: cjson::spec::Spec) -> Result<Spec, Error> { | ||
| fn load_from(s: cjson::spec::Spec, handlers: &[Arc<ActionHandler>]) -> Result<Spec, Error> { |
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| Ok(()) | ||
| } | ||
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| fn is_target(&self, bytes: &Bytes) -> bool { |
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How about remove this method
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We need some sort of function that only checks if provided byte array is valid one that this handler can decode, without execution. It's used for blocking invalid parcels in sync and rpc.
Since execute requires TopLevelState as argument, I think it's not a good idea to merge these.
state/src/action_handler/hit.rs
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| } | ||
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| /// `bytes` must be valid encoding of HitAction | ||
| fn execute(&self, bytes: &Bytes, state: &mut TopLevelState) -> StateResult<Outcome> { |
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and make this function return Option<StateResult<Outcome>>?
| }) | ||
| } | ||
| Action::Custom(bytes) => { | ||
| let handlers = self.db.custom_handlers().to_vec(); |
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Why do you convert it do Vec?
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custom_handlers returns reference, so handlers borrows self.
self is used as mutable reference in later code, so lifetime conflicts there.
So I wanted to clone handlers, and I thought to_vec would be a good solution.
| }) | ||
| } | ||
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| fn custom_handlers(&self) -> Vec<Arc<ActionHandler>> { |
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Why noy fn custom_handlers(&self) -> &[Arc<ActionHandler>>] {
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If we return reference, then lock over state_db won't be released while holding that reference.
I thought it would be simpler to return a fresh copy of the vector and release the lock earlier instead of holding the lock.
remagpie
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