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How to use the evm crate
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| extern crate evm; | |
| extern crate hex; | |
| extern crate primitive_types; | |
| use evm::backend::{MemoryBackend, MemoryVicinity, MemoryAccount}; | |
| use primitive_types::{H160, U256}; | |
| use std::error::Error; | |
| use std::collections::BTreeMap; | |
| use evm::executor::StackExecutor; | |
| use evm::{Config, Runtime, Context}; | |
| use std::rc::Rc; | |
| fn main() -> Result<(), Box<dyn Error>> { | |
| println!("hello world"); | |
| let vicinity = MemoryVicinity { | |
| gas_price: U256::zero(), | |
| /// Origin. | |
| origin: H160::random(), | |
| /// Chain ID. | |
| chain_id: U256::from(1), | |
| /// Environmental block hashes. | |
| block_hashes: vec![ | |
| "00000000000000001ebf88508a03865c71d452e25f4d51194196a1d22b6653dc" | |
| .parse() | |
| .unwrap(), | |
| "00000000000000010ff5414c5cfbe9eae982e8cef7eb2399a39118e1206c8247" | |
| .parse() | |
| .unwrap(), | |
| ], | |
| /// Environmental block number. | |
| block_number: U256::from(0), | |
| /// Environmental coinbase. | |
| block_coinbase: H160::zero(), | |
| /// Environmental block timestamp. | |
| block_timestamp: U256::from(1529891469), | |
| /// Environmental block difficulty. | |
| block_difficulty: U256::zero(), | |
| /// Environmental block gas limit. | |
| block_gas_limit: U256::zero(), | |
| }; | |
| println!("vicinity => {:#?}", vicinity); | |
| let state = BTreeMap::new(); | |
| let backend = MemoryBackend::new(&vicinity, state); | |
| let config = Config::odyssey_3_7(); | |
| let gas_limit = 1_000_000; | |
| let mut executor = StackExecutor::new(&backend, gas_limit, &config); | |
| println!("gas => {}", executor.gas()); | |
| let ctx = Context { | |
| address: "5cbdd86a2fa8dc4bddd8a8f69dba48572eec07fb".parse().unwrap(), | |
| caller: H160::random(), | |
| // call value, if nonzero, must have a payable | |
| call_value: U256::from(0), // call value | |
| call_token_id: U256::from(0), | |
| call_token_value: U256::from(0), | |
| }; | |
| println!("ctx => {:#?}", ctx); | |
| println!("==========================================================================="); | |
| // TUVjJmodgMGfpnU2tdrivRVmM5v5Leht2G | |
| let code = Rc::new(hex::decode("6080604052348015600f57600080fd5b506004361060325760003560e01c80632096525514603757806355241077146053575b600080fd5b603d607e565b6040518082815260200191505060405180910390f35b607c60048036036020811015606757600080fd5b81019080803590602001909291905050506087565b005b60008054905090565b806000819055505056fea265627a7a72315820fae59b6c1b73f3b64ed8a4c322273a91bd474c7848feb439a4856550274874be64736f6c63430005100032").unwrap()); | |
| // getValue => 229, Succeed(Returned) | |
| // d14a0470500c4f6f6603587b2d8e8176a5a5aa623738ab97489ef0aba5483cc9 | |
| // let data = Rc::new(hex::decode("20965255").unwrap()); | |
| // setValue => 20239, Succeed(Stopped), 0 => 20239 | |
| // 1954ba5e6c187b8ea46470d6ee33067209cd9480b04da36f282e9f1bb8c2f82e | |
| // tvm: some to some: 5239 | |
| // : some to 0: 5239 | |
| // : 0 to some: 20239 | |
| let data = Rc::new(hex::decode("55241077000000000000000000000000000000000000000000000000000000000000008c").unwrap()); | |
| let mut rt = Runtime::new(code.clone(), data.clone(), ctx.clone(), &config); | |
| let exit_reason = executor.execute(&mut rt); | |
| println!("exit => {:?}", exit_reason); | |
| let ret_val = rt.machine().return_value(); | |
| println!("return => {:?}", hex::encode(ret_val)); | |
| println!("stack => {:?}", rt.machine().stack()); | |
| println!("memory => {:?}", rt.machine().memory()); | |
| // 2290 | |
| println!("consumed gas/energy => {}", gas_limit - executor.gas()); | |
| let gas_limit = executor.gas(); | |
| { | |
| let data = Rc::new(hex::decode("552410770000000000000000000000000000000000000000000000000000000000000001").unwrap()); | |
| let mut rt = Runtime::new(code, data, ctx, &config); | |
| let exit_reason = executor.execute(&mut rt); | |
| println!("exit => {:?}", exit_reason); | |
| println!("consumed gas/energy => {}", gas_limit - executor.gas()); | |
| } | |
| /* | |
| { | |
| let data = Rc::new(hex::decode("20965255").unwrap()); | |
| let mut rt = Runtime::new(code, data, ctx, &config); | |
| let exit_reason = executor.execute(&mut rt); | |
| println!("exit => {:?}", exit_reason); | |
| let ret_val = rt.machine().return_value(); | |
| println!("return => {:?}", hex::encode(ret_val)); | |
| } | |
| */ | |
| Ok(()) | |
| } |
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