Crate near_vm_logic

near-vm-logic

This crate implements the specification of the interface that Near blockchain exposes to the smart contracts. It is not dependent on the specific way the smart contract code is executed, e.g. through Wasmer or whatnot, and therefore can be used for unit tests in smart contracts.

Note, this logic assumes the little endian byte ordering of the memory used by the smart contract.

Run tests

cargo test --features mocks

Re-exports

• pub use types::ReturnData;
• pub use gas_counter::with_ext_cost_counter;

Modules

• gas_counter
• mocks
• profile
• test_utils
• types

Structs

• ActionCostsIter
  An iterator over the variants of Self
• ExtCostsConfig
• ExtCostsIter
  An iterator over the variants of Self
• MemSlice
  Representation of the address slice of guest memory.
• ParameterCost
• ReceiptMetadata
• VMConfig
  Dynamic configuration parameters required for the WASM runtime to execute a smart contract.
• VMContext
  Context for the contract execution.
• VMLimitConfig
  Describes limits for VM and Runtime. TODO #4139: consider switching to strongly-typed wrappers instead of raw quantities
• VMLogic
• VMOutcome
• ViewConfig
  Configuration of view methods execution, during which no costs should be charged.

Enums

• AccountIdValidityRulesVersion
• ActionCosts
• ExtCosts
  Strongly-typed representation of the fees for counting.
• HostError
• StackLimiterVersion
  Our original code for limiting WASM stack was buggy. We fixed that, but we still have to use old (V0) limiter for old protocol versions.
• StorageGetMode
  This enum represents if a storage_get call will be performed through flat storage or trie
• VMLogicError

Traits

• External
  An external blockchain interface for the Runtime logic
• MemoryLike
  An abstraction over the memory of the smart contract.
• ValuePtr
  Logical pointer to a value in storage. Allows getting value length before getting the value itself. This is needed so that runtime can charge gas before accessing a potentially large value.

Type Definitions

• ProtocolVersion