Trait Handler

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pub trait Handler {
    type CreateInterrupt;
    type CreateFeedback;
    type CallInterrupt;
    type CallFeedback;

Show 38 methods    // Required methods
    fn balance(&self, address: H160) -> U256;
    fn code_size(&mut self, address: H160) -> U256;
    fn code_hash(&mut self, address: H160) -> H256;
    fn code(&self, address: H160) -> Vec<u8> ⓘ;
    fn storage(&self, address: H160, index: H256) -> H256;
    fn is_empty_storage(&self, address: H160) -> bool;
    fn original_storage(&self, address: H160, index: H256) -> H256;
    fn gas_left(&self) -> U256;
    fn gas_price(&self) -> U256;
    fn origin(&self) -> H160;
    fn block_hash(&self, number: U256) -> H256;
    fn block_number(&self) -> U256;
    fn block_coinbase(&self) -> H160;
    fn block_timestamp(&self) -> U256;
    fn block_difficulty(&self) -> U256;
    fn block_randomness(&self) -> Option<H256>;
    fn block_gas_limit(&self) -> U256;
    fn block_base_fee_per_gas(&self) -> U256;
    fn chain_id(&self) -> U256;
    fn exists(&self, address: H160) -> bool;
    fn deleted(&self, address: H160) -> bool;
    fn is_cold(&mut self, address: H160, index: Option<H256>) -> bool;
    fn set_storage(
        &mut self,
        address: H160,
        index: H256,
        value: H256,
    ) -> Result<(), ExitError>;
    fn log(
        &mut self,
        address: H160,
        topics: Vec<H256>,
        data: Vec<u8>,
    ) -> Result<(), ExitError>;
    fn mark_delete(
        &mut self,
        address: H160,
        target: H160,
    ) -> Result<(), ExitError>;
    fn create(
        &mut self,
        caller: H160,
        scheme: CreateScheme,
        value: U256,
        init_code: Vec<u8>,
        target_gas: Option<u64>,
    ) -> Capture<(ExitReason, Vec<u8>), Self::CreateInterrupt>;
    fn call(
        &mut self,
        code_address: H160,
        transfer: Option<Transfer>,
        input: Vec<u8>,
        target_gas: Option<u64>,
        is_static: bool,
        context: Context,
    ) -> Capture<(ExitReason, Vec<u8>), Self::CallInterrupt>;
    fn record_external_operation(
        &mut self,
        op: ExternalOperation,
    ) -> Result<(), ExitError>;
    fn blob_base_fee(&self) -> Option<u128>;
    fn get_blob_hash(&self, index: usize) -> Option<U256>;
    fn tstore(
        &mut self,
        address: H160,
        index: H256,
        value: U256,
    ) -> Result<(), ExitError>;
    fn tload(&mut self, address: H160, index: H256) -> Result<U256, ExitError>;
    fn get_authority_target(&mut self, address: H160) -> Option<H160>;
    fn authority_code(&mut self, authority: H160) -> Vec<u8> ⓘ;
    fn warm_target(&mut self, target: (H160, Option<H256>));

    // Provided methods
    fn create_feedback(
        &mut self,
        _feedback: Self::CreateFeedback,
    ) -> Result<(), ExitError> { ... }
    fn call_feedback(
        &mut self,
        _feedback: Self::CallFeedback,
    ) -> Result<(), ExitError> { ... }
    fn other(
        &mut self,
        opcode: Opcode,
        _stack: &mut Machine,
    ) -> Result<(), ExitError> { ... }
}

Expand description

EVM context handler.

Required Associated Types§

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type CreateInterrupt

Type of CREATE interrupt.

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type CreateFeedback

Feedback value for CREATE interrupt.

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type CallInterrupt

Type of CALL interrupt.

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type CallFeedback

Feedback value of CALL interrupt.

Required Methods§

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fn balance(&self, address: H160) -> U256

Get balance of address.

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fn code_size(&mut self, address: H160) -> U256

Get code size of address.

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fn code_hash(&mut self, address: H160) -> H256

Get code hash of address.

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fn code(&self, address: H160) -> Vec<u8> ⓘ

Get code of address.

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fn storage(&self, address: H160, index: H256) -> H256

Get storage value of address at index.

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fn is_empty_storage(&self, address: H160) -> bool

Check if the storage of the address is empty.

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fn original_storage(&self, address: H160, index: H256) -> H256

Get original storage value of address at index.

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fn gas_left(&self) -> U256

Get the gas left value.

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fn gas_price(&self) -> U256

Get the gas price value.

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fn origin(&self) -> H160

Get execution origin.

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fn block_hash(&self, number: U256) -> H256

Get environmental block hash.

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fn block_number(&self) -> U256

Get environmental block number.

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fn block_coinbase(&self) -> H160

Get environmental coinbase.

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fn block_timestamp(&self) -> U256

Get environmental block timestamp.

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fn block_difficulty(&self) -> U256

Get environmental block difficulty.

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fn block_randomness(&self) -> Option<H256>

Get environmental block randomness.

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fn block_gas_limit(&self) -> U256

Get environmental gas limit.

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fn block_base_fee_per_gas(&self) -> U256

Environmental block base fee.

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fn chain_id(&self) -> U256

Get environmental chain ID.

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fn exists(&self, address: H160) -> bool

Check whether an address exists.

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fn deleted(&self, address: H160) -> bool

Check whether an address has already been deleted.

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fn is_cold(&mut self, address: H160, index: Option<H256>) -> bool

Checks if the address or (address, index) pair has been previously accessed (or set in accessed_addresses / accessed_storage_keys via an access list transaction). References: