Commit a01401f258acd7e0b1f4ecbe82cdd1bc26048b4c
renamed imports to interfacee
wanderer committed on 1/9/2017, 7:47:18 PMParent: e0a962d924b51e646934cc30ae1c50df8f1ef31a
Files changed
| index.js | changed |
| tests/interfaceRunner.js | changed |
| vm.js | changed |
| EVMimports.js | deleted |
| EVMinterface.js | added |
| index.js | ||
|---|---|---|
| @@ -1,42 +1,47 @@ | ||
| 1 | 1 | const Vertex = require('merkle-trie') |
| 2 | 2 | // The Kernel Exposes this Interface to VM instances it makes |
| 3 | -const Imports = require('./EVMimports.js') | |
| 3 | +const defaultInterface = require('./EVMinterface.js') | |
| 4 | 4 | const VM = require('./vm.js') |
| 5 | 5 | const Environment = require('./environment.js') |
| 6 | 6 | |
| 7 | 7 | module.exports = class Kernel { |
| 8 | 8 | constructor (opts = {}) { |
| 9 | - opts.state = opts.state || new Vertex(opts.code) | |
| 10 | - opts.code = opts.state.value || opts.code | |
| 11 | - | |
| 12 | - // if code is bound to this kernel then create the interfaceAPI and the imports | |
| 13 | - this._vm = new VM(opts.code) | |
| 14 | - this.imports = buildImports(this._vm, opts.interfaces) | |
| 15 | - | |
| 16 | - /** | |
| 17 | - * Builds a import map with an array of given interfaces | |
| 18 | - */ | |
| 19 | - function buildImports (api, imports = [Imports]) { | |
| 20 | - return imports.reduce((obj, InterfaceConstuctor) => { | |
| 21 | - obj[InterfaceConstuctor.name] = new InterfaceConstuctor(api).exports | |
| 22 | - return obj | |
| 23 | - }, {}) | |
| 24 | - } | |
| 9 | + this.state = opts.state || new Vertex() | |
| 10 | + this.state.value = opts.code || this.state.value | |
| 11 | + this.interfaces = opts.interfaces || [defaultInterface] | |
| 12 | + this._vm = new VM(this.state.value) | |
| 25 | 13 | } |
| 26 | 14 | |
| 27 | 15 | /** |
| 28 | 16 | * run the kernels code with a given enviroment |
| 29 | 17 | * The Kernel Stores all of its state in the Environment. The Interface is used |
| 30 | 18 | * to by the VM to retrive infromation from the Environment. |
| 31 | 19 | */ |
| 32 | - async run (environment = new Environment({state: this}), imports = this.imports) { | |
| 33 | - await this._vm.run(environment, imports) | |
| 20 | + async run (environment = new Environment({state: this}), interfaces = this.interfaces) { | |
| 21 | + /** | |
| 22 | + * Builds a import map with an array of given interfaces | |
| 23 | + */ | |
| 24 | + async function buildImports (kernelApi, imports, state) { | |
| 25 | + const result = {} | |
| 26 | + for (const Import of imports) { | |
| 27 | + const newIterface = new Import(kernelApi) | |
| 28 | + result[Import.name] = newIterface.exports | |
| 29 | + // initailize the import | |
| 30 | + await newIterface.initialize(state) | |
| 31 | + } | |
| 32 | + return result | |
| 33 | + } | |
| 34 | + | |
| 35 | + const initializedImports = await buildImports(this._vm, interfaces, this.state) | |
| 36 | + return await this._vm.run(environment, initializedImports) | |
| 34 | 37 | } |
| 35 | 38 | |
| 36 | 39 | async messageReceiver (message) { |
| 37 | 40 | // let the code handle the message if there is code |
| 38 | - const environment = new Environment(message) | |
| 41 | + const environment = new Environment({ | |
| 42 | + message: message | |
| 43 | + }) | |
| 39 | 44 | let result = await this.run(environment) |
| 40 | 45 | if (!result.execption) { |
| 41 | 46 | this.state = result.state |
| 42 | 47 | } |
| tests/interfaceRunner.js | ||
|---|---|---|
| @@ -25,9 +25,8 @@ | ||
| 25 | 25 | const envData = JSON.parse(fs.readFileSync(`${dir}/${testName}.json`).toString()) |
| 26 | 26 | |
| 27 | 27 | envData.caller = new Address(envData.caller) |
| 28 | 28 | envData.address = new Address(envData.address) |
| 29 | - envData.coinbase = new Address(envData.coinbase) | |
| 30 | 29 | envData.origin = new Address(envData.origin) |
| 31 | 30 | envData.callData = new Buffer(envData.callData.slice(2), 'hex') |
| 32 | 31 | envData.callValue = new U256(envData.callValue) |
| 33 | 32 | |
| @@ -52,13 +51,21 @@ | ||
| 52 | 51 | const path = ['accounts', ...new Buffer(address.slice(2), 'hex')] |
| 53 | 52 | rootVertex.set(path, accountVertex) |
| 54 | 53 | } |
| 55 | 54 | |
| 56 | - envData.state = await rootVertex.get(['accounts', ...envData.address.toBuffer()]) | |
| 55 | + const state = envData.state = await rootVertex.get(['accounts', ...envData.address.toBuffer()]) | |
| 56 | + state.value = code | |
| 57 | + | |
| 58 | + const env = new Environment(envData) | |
| 59 | + env.block.header.coinbase = new Address(envData.coinbase) | |
| 60 | + | |
| 61 | + rootVertex.set('block', new Vertex({ | |
| 62 | + value: env.block | |
| 63 | + })) | |
| 64 | + | |
| 57 | 65 | const kernel = new Kernel({ |
| 58 | - code: code | |
| 66 | + state: state | |
| 59 | 67 | }) |
| 60 | - const env = new Environment(envData) | |
| 61 | 68 | |
| 62 | 69 | try { |
| 63 | 70 | await kernel.run(env) |
| 64 | 71 | } catch (e) { |
| vm.js | ||
|---|---|---|
| @@ -9,16 +9,19 @@ | ||
| 9 | 9 | |
| 10 | 10 | /** |
| 11 | 11 | * Runs the core VM with a given environment and imports |
| 12 | 12 | */ |
| 13 | - run (environment, imports) { | |
| 13 | + async run (environment, imports) { | |
| 14 | 14 | this._environment = environment |
| 15 | 15 | // TODO, delete the instance once done. |
| 16 | 16 | const instance = this._instance = WebAssembly.Instance(this._module, imports) |
| 17 | 17 | if (instance.exports.main) { |
| 18 | 18 | instance.exports.main() |
| 19 | 19 | } |
| 20 | - return this.onDone() | |
| 20 | + await this.onDone() | |
| 21 | + const env = this._environment | |
| 22 | + delete this._environment | |
| 23 | + return env | |
| 21 | 24 | } |
| 22 | 25 | |
| 23 | 26 | /** |
| 24 | 27 | * returns a promise that resolves when the wasm instance is done running |
| EVMimports.js | ||
|---|---|---|
| @@ -1,656 +1,0 @@ | ||
| 1 | -/** | |
| 2 | - * This is the Ethereum interface that is exposed to the WASM instance which | |
| 3 | - * enables to interact with the Ethereum Environment | |
| 4 | - */ | |
| 5 | -const fs = require('fs') | |
| 6 | -const path = require('path') | |
| 7 | -const ethUtil = require('ethereumjs-util') | |
| 8 | -const Vertex = require('merkle-trie') | |
| 9 | -const U256 = require('./deps/u256.js') | |
| 10 | - | |
| 11 | -const U128_SIZE_BYTES = 16 | |
| 12 | -const ADDRESS_SIZE_BYTES = 20 | |
| 13 | -const U256_SIZE_BYTES = 32 | |
| 14 | - | |
| 15 | -// The interface exposed to the WebAessembly Core | |
| 16 | -module.exports = class Interface { | |
| 17 | - constructor (kernel) { | |
| 18 | - this.kernel = kernel | |
| 19 | - const shimBin = fs.readFileSync(path.join(__dirname, '/wasm/interface.wasm')) | |
| 20 | - const shimMod = WebAssembly.Module(shimBin) | |
| 21 | - this.shims = WebAssembly.Instance(shimMod, { | |
| 22 | - 'interface': { | |
| 23 | - 'useGas': this._useGas.bind(this), | |
| 24 | - 'getGasLeftHigh': this._getGasLeftHigh.bind(this), | |
| 25 | - 'getGasLeftLow': this._getGasLeftLow.bind(this), | |
| 26 | - 'call': this._call.bind(this) | |
| 27 | - } | |
| 28 | - }) | |
| 29 | - } | |
| 30 | - | |
| 31 | - static get name () { | |
| 32 | - return 'ethereum' | |
| 33 | - } | |
| 34 | - | |
| 35 | - get exports () { | |
| 36 | - let exportMethods = [ | |
| 37 | - // include all the public methods according to the Ethereum Environment Interface (EEI) r1 | |
| 38 | - 'getAddress', | |
| 39 | - 'getBalance', | |
| 40 | - 'getTxOrigin', | |
| 41 | - 'getCaller', | |
| 42 | - 'getCallValue', | |
| 43 | - 'getCallDataSize', | |
| 44 | - 'callDataCopy', | |
| 45 | - 'callDataCopy256', | |
| 46 | - 'getCodeSize', | |
| 47 | - 'codeCopy', | |
| 48 | - 'getExternalCodeSize', | |
| 49 | - 'externalCodeCopy', | |
| 50 | - 'getTxGasPrice', | |
| 51 | - 'getBlockHash', | |
| 52 | - 'getBlockCoinbase', | |
| 53 | - 'getBlockTimestamp', | |
| 54 | - 'getBlockNumber', | |
| 55 | - 'getBlockDifficulty', | |
| 56 | - 'getBlockGasLimit', | |
| 57 | - 'log', | |
| 58 | - 'create', | |
| 59 | - 'callCode', | |
| 60 | - 'callDelegate', | |
| 61 | - 'storageStore', | |
| 62 | - 'storageLoad', | |
| 63 | - 'return', | |
| 64 | - 'selfDestruct' | |
| 65 | - ] | |
| 66 | - let ret = {} | |
| 67 | - exportMethods.forEach((method) => { | |
| 68 | - ret[method] = this[method].bind(this) | |
| 69 | - }) | |
| 70 | - | |
| 71 | - // add shims | |
| 72 | - ret.useGas = this.shims.exports.useGas | |
| 73 | - ret.getGasLeft = this.shims.exports.getGasLeft | |
| 74 | - ret.call = this.shims.exports.call | |
| 75 | - return ret | |
| 76 | - } | |
| 77 | - | |
| 78 | - setModule (mod) { | |
| 79 | - this.module = mod | |
| 80 | - } | |
| 81 | - | |
| 82 | - /** | |
| 83 | - * Subtracts an amount to the gas counter | |
| 84 | - * @param {integer} amount the amount to subtract to the gas counter | |
| 85 | - */ | |
| 86 | - _useGas (high, low) { | |
| 87 | - this.takeGas(from64bit(high, low)) | |
| 88 | - } | |
| 89 | - | |
| 90 | - /** | |
| 91 | - * Returns the current amount of gas | |
| 92 | - * @return {integer} | |
| 93 | - */ | |
| 94 | - _getGasLeftHigh () { | |
| 95 | - return Math.floor(this.kernel.environment.gasLeft / 4294967296) | |
| 96 | - } | |
| 97 | - | |
| 98 | - /** | |
| 99 | - * Returns the current amount of gas | |
| 100 | - * @return {integer} | |
| 101 | - */ | |
| 102 | - _getGasLeftLow () { | |
| 103 | - return this.kernel.environment.gasLeft | |
| 104 | - } | |
| 105 | - | |
| 106 | - /** | |
| 107 | - * Gets address of currently executing account and loads it into memory at | |
| 108 | - * the given offset. | |
| 109 | - * @param {integer} offset | |
| 110 | - */ | |
| 111 | - getAddress (offset) { | |
| 112 | - this.takeGas(2) | |
| 113 | - | |
| 114 | - this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.address.toMemory()) | |
| 115 | - } | |
| 116 | - | |
| 117 | - /** | |
| 118 | - * Gets balance of the given account and loads it into memory at the given | |
| 119 | - * offset. | |
| 120 | - * @param {integer} addressOffset the memory offset to laod the address | |
| 121 | - * @param {integer} resultOffset | |
| 122 | - */ | |
| 123 | - getBalance (addressOffset, offset, cbIndex) { | |
| 124 | - this.takeGas(20) | |
| 125 | - | |
| 126 | - const path = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'balance'] | |
| 127 | - const opPromise = this.kernel.environment.state.root.get(path) | |
| 128 | - .then(vertex => new U256(vertex.value)) | |
| 129 | - .catch(() => new U256(0)) | |
| 130 | - | |
| 131 | - this.kernel.pushOpsQueue(opPromise, cbIndex, balance => { | |
| 132 | - this.setMemory(offset, U128_SIZE_BYTES, balance.toMemory(U128_SIZE_BYTES)) | |
| 133 | - }) | |
| 134 | - } | |
| 135 | - | |
| 136 | - /** | |
| 137 | - * Gets the execution's origination address and loads it into memory at the | |
| 138 | - * given offset. This is the sender of original transaction; it is never an | |
| 139 | - * account with non-empty associated code. | |
| 140 | - * @param {integer} offset | |
| 141 | - */ | |
| 142 | - getTxOrigin (offset) { | |
| 143 | - this.takeGas(2) | |
| 144 | - | |
| 145 | - this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.origin.toMemory()) | |
| 146 | - } | |
| 147 | - | |
| 148 | - /** | |
| 149 | - * Gets caller address and loads it into memory at the given offset. This is | |
| 150 | - * the address of the account that is directly responsible for this execution. | |
| 151 | - * @param {integer} offset | |
| 152 | - */ | |
| 153 | - getCaller (offset) { | |
| 154 | - this.takeGas(2) | |
| 155 | - | |
| 156 | - this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.caller.toMemory()) | |
| 157 | - } | |
| 158 | - | |
| 159 | - /** | |
| 160 | - * Gets the deposited value by the instruction/transaction responsible for | |
| 161 | - * this execution and loads it into memory at the given location. | |
| 162 | - * @param {integer} offset | |
| 163 | - */ | |
| 164 | - getCallValue (offset) { | |
| 165 | - this.takeGas(2) | |
| 166 | - | |
| 167 | - this.setMemory(offset, U128_SIZE_BYTES, this.kernel.environment.callValue.toMemory(U128_SIZE_BYTES)) | |
| 168 | - } | |
| 169 | - | |
| 170 | - /** | |
| 171 | - * Get size of input data in current environment. This pertains to the input | |
| 172 | - * data passed with the message call instruction or transaction. | |
| 173 | - * @return {integer} | |
| 174 | - */ | |
| 175 | - getCallDataSize () { | |
| 176 | - this.takeGas(2) | |
| 177 | - | |
| 178 | - return this.kernel.environment.callData.length | |
| 179 | - } | |
| 180 | - | |
| 181 | - /** | |
| 182 | - * Copys the input data in current environment to memory. This pertains to | |
| 183 | - * the input data passed with the message call instruction or transaction. | |
| 184 | - * @param {integer} offset the offset in memory to load into | |
| 185 | - * @param {integer} dataOffset the offset in the input data | |
| 186 | - * @param {integer} length the length of data to copy | |
| 187 | - */ | |
| 188 | - callDataCopy (offset, dataOffset, length) { | |
| 189 | - this.takeGas(3 + Math.ceil(length / 32) * 3) | |
| 190 | - | |
| 191 | - if (length) { | |
| 192 | - const callData = this.kernel.environment.callData.slice(dataOffset, dataOffset + length) | |
| 193 | - this.setMemory(offset, length, callData) | |
| 194 | - } | |
| 195 | - } | |
| 196 | - | |
| 197 | - /** | |
| 198 | - * Copys the input data in current environment to memory. This pertains to | |
| 199 | - * the input data passed with the message call instruction or transaction. | |
| 200 | - * @param {integer} offset the offset in memory to load into | |
| 201 | - * @param {integer} dataOffset the offset in the input data | |
| 202 | - */ | |
| 203 | - callDataCopy256 (offset, dataOffset) { | |
| 204 | - this.takeGas(3) | |
| 205 | - const callData = this.kernel.environment.callData.slice(dataOffset, dataOffset + 32) | |
| 206 | - this.setMemory(offset, U256_SIZE_BYTES, callData) | |
| 207 | - } | |
| 208 | - | |
| 209 | - /** | |
| 210 | - * Gets the size of code running in current environment. | |
| 211 | - * @return {interger} | |
| 212 | - */ | |
| 213 | - getCodeSize (cbIndex) { | |
| 214 | - this.takeGas(2) | |
| 215 | - | |
| 216 | - const opPromise = this.kernel.environment.state | |
| 217 | - .get('code') | |
| 218 | - .then(vertex => vertex.value.length) | |
| 219 | - | |
| 220 | - // wait for all the prevouse async ops to finish before running the callback | |
| 221 | - this.kernel.pushOpsQueue(opPromise, cbIndex, length => length) | |
| 222 | - } | |
| 223 | - | |
| 224 | - /** | |
| 225 | - * Copys the code running in current environment to memory. | |
| 226 | - * @param {integer} offset the memory offset | |
| 227 | - * @param {integer} codeOffset the code offset | |
| 228 | - * @param {integer} length the length of code to copy | |
| 229 | - */ | |
| 230 | - codeCopy (resultOffset, codeOffset, length, cbIndex) { | |
| 231 | - this.takeGas(3 + Math.ceil(length / 32) * 3) | |
| 232 | - | |
| 233 | - let opPromise | |
| 234 | - | |
| 235 | - if (length) { | |
| 236 | - opPromise = this.kernel.environment.state | |
| 237 | - .get('code') | |
| 238 | - .then(vertex => vertex.value) | |
| 239 | - } else { | |
| 240 | - opPromise = Promise.resolve([]) | |
| 241 | - } | |
| 242 | - | |
| 243 | - // wait for all the prevouse async ops to finish before running the callback | |
| 244 | - this.kernel.pushOpsQueue(opPromise, cbIndex, code => { | |
| 245 | - if (code.length) { | |
| 246 | - code = code.slice(codeOffset, codeOffset + length) | |
| 247 | - this.setMemory(resultOffset, length, code) | |
| 248 | - } | |
| 249 | - }) | |
| 250 | - } | |
| 251 | - | |
| 252 | - /** | |
| 253 | - * Get size of an account’s code. | |
| 254 | - * @param {integer} addressOffset the offset in memory to load the address from | |
| 255 | - * @return {integer} | |
| 256 | - */ | |
| 257 | - getExternalCodeSize (addressOffset, cbOffset) { | |
| 258 | - this.takeGas(20) | |
| 259 | - const address = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'code'] | |
| 260 | - const opPromise = this.kernel.environment.state.root | |
| 261 | - .get(address) | |
| 262 | - .then(vertex => vertex.value.length) | |
| 263 | - .catch(() => 0) | |
| 264 | - | |
| 265 | - // wait for all the prevouse async ops to finish before running the callback | |
| 266 | - this.kernel.pushOpsQueue(opPromise, cbOffset, length => length) | |
| 267 | - } | |
| 268 | - | |
| 269 | - /** | |
| 270 | - * Copys the code of an account to memory. | |
| 271 | - * @param {integer} addressOffset the memory offset of the address | |
| 272 | - * @param {integer} resultOffset the memory offset | |
| 273 | - * @param {integer} codeOffset the code offset | |
| 274 | - * @param {integer} length the length of code to copy | |
| 275 | - */ | |
| 276 | - externalCodeCopy (addressOffset, resultOffset, codeOffset, length, cbIndex) { | |
| 277 | - this.takeGas(20 + Math.ceil(length / 32) * 3) | |
| 278 | - | |
| 279 | - const address = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'code'] | |
| 280 | - let opPromise | |
| 281 | - | |
| 282 | - if (length) { | |
| 283 | - opPromise = this.kernel.environment.state.root | |
| 284 | - .get(address) | |
| 285 | - .then(vertex => vertex.value) | |
| 286 | - .catch(() => []) | |
| 287 | - } else { | |
| 288 | - opPromise = Promise.resolve([]) | |
| 289 | - } | |
| 290 | - | |
| 291 | - // wait for all the prevouse async ops to finish before running the callback | |
| 292 | - this.kernel.pushOpsQueue(opPromise, cbIndex, code => { | |
| 293 | - if (code.length) { | |
| 294 | - code = code.slice(codeOffset, codeOffset + length) | |
| 295 | - this.setMemory(resultOffset, length, code) | |
| 296 | - } | |
| 297 | - }) | |
| 298 | - } | |
| 299 | - | |
| 300 | - /** | |
| 301 | - * Gets price of gas in current environment. | |
| 302 | - * @return {integer} | |
| 303 | - */ | |
| 304 | - getTxGasPrice () { | |
| 305 | - this.takeGas(2) | |
| 306 | - | |
| 307 | - return this.kernel.environment.gasPrice | |
| 308 | - } | |
| 309 | - | |
| 310 | - /** | |
| 311 | - * Gets the hash of one of the 256 most recent complete blocks. | |
| 312 | - * @param {integer} number which block to load | |
| 313 | - * @param {integer} offset the offset to load the hash into | |
| 314 | - */ | |
| 315 | - getBlockHash (number, offset, cbOffset) { | |
| 316 | - this.takeGas(20) | |
| 317 | - | |
| 318 | - const diff = this.kernel.environment.block.number - number | |
| 319 | - let opPromise | |
| 320 | - | |
| 321 | - if (diff > 256 || diff <= 0) { | |
| 322 | - opPromise = Promise.resolve(new U256(0)) | |
| 323 | - } else { | |
| 324 | - opPromise = this.kernel.environment.getBlockHash(number) | |
| 325 | - } | |
| 326 | - | |
| 327 | - // wait for all the prevouse async ops to finish before running the callback | |
| 328 | - this.kernel.pushOpsQueue(opPromise, cbOffset, hash => { | |
| 329 | - this.setMemory(offset, U256_SIZE_BYTES, hash.toMemory()) | |
| 330 | - }) | |
| 331 | - } | |
| 332 | - | |
| 333 | - /** | |
| 334 | - * Gets the block’s beneficiary address and loads into memory. | |
| 335 | - * @param offset | |
| 336 | - */ | |
| 337 | - getBlockCoinbase (offset) { | |
| 338 | - this.takeGas(2) | |
| 339 | - | |
| 340 | - this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.coinbase.toMemory()) | |
| 341 | - } | |
| 342 | - | |
| 343 | - /** | |
| 344 | - * Get the block’s timestamp. | |
| 345 | - * @return {integer} | |
| 346 | - */ | |
| 347 | - getBlockTimestamp () { | |
| 348 | - this.takeGas(2) | |
| 349 | - | |
| 350 | - return this.kernel.environment.block.timestamp | |
| 351 | - } | |
| 352 | - | |
| 353 | - /** | |
| 354 | - * Get the block’s number. | |
| 355 | - * @return {integer} | |
| 356 | - */ | |
| 357 | - getBlockNumber () { | |
| 358 | - this.takeGas(2) | |
| 359 | - | |
| 360 | - return this.kernel.environment.block.number | |
| 361 | - } | |
| 362 | - | |
| 363 | - /** | |
| 364 | - * Get the block’s difficulty. | |
| 365 | - * @return {integer} | |
| 366 | - */ | |
| 367 | - getBlockDifficulty (offset) { | |
| 368 | - this.takeGas(2) | |
| 369 | - | |
| 370 | - this.setMemory(offset, U256_SIZE_BYTES, this.kernel.environment.block.difficulty.toMemory()) | |
| 371 | - } | |
| 372 | - | |
| 373 | - /** | |
| 374 | - * Get the block’s gas limit. | |
| 375 | - * @return {integer} | |
| 376 | - */ | |
| 377 | - getBlockGasLimit () { | |
| 378 | - this.takeGas(2) | |
| 379 | - | |
| 380 | - return this.kernel.environment.block.gasLimit | |
| 381 | - } | |
| 382 | - | |
| 383 | - /** | |
| 384 | - * Creates a new log in the current environment | |
| 385 | - * @param {integer} dataOffset the offset in memory to load the memory | |
| 386 | - * @param {integer} length the data length | |
| 387 | - * @param {integer} number of topics | |
| 388 | - */ | |
| 389 | - log (dataOffset, length, numberOfTopics, topic1, topic2, topic3, topic4) { | |
| 390 | - if (numberOfTopics < 0 || numberOfTopics > 4) { | |
| 391 | - throw new Error('Invalid numberOfTopics') | |
| 392 | - } | |
| 393 | - | |
| 394 | - this.takeGas(375 + length * 8 + numberOfTopics * 375) | |
| 395 | - | |
| 396 | - const data = length ? this.getMemory(dataOffset, length).slice(0) : new Uint8Array([]) | |
| 397 | - const topics = [] | |
| 398 | - | |
| 399 | - if (numberOfTopics > 0) { | |
| 400 | - topics.push(U256.fromMemory(this.getMemory(topic1, U256_SIZE_BYTES))) | |
| 401 | - } | |
| 402 | - | |
| 403 | - if (numberOfTopics > 1) { | |
| 404 | - topics.push(U256.fromMemory(this.getMemory(topic2, U256_SIZE_BYTES))) | |
| 405 | - } | |
| 406 | - | |
| 407 | - if (numberOfTopics > 2) { | |
| 408 | - topics.push(U256.fromMemory(this.getMemory(topic3, U256_SIZE_BYTES))) | |
| 409 | - } | |
| 410 | - | |
| 411 | - if (numberOfTopics > 3) { | |
| 412 | - topics.push(U256.fromMemory(this.getMemory(topic4, U256_SIZE_BYTES))) | |
| 413 | - } | |
| 414 | - | |
| 415 | - this.kernel.environment.logs.push({ | |
| 416 | - data: data, | |
| 417 | - topics: topics | |
| 418 | - }) | |
| 419 | - } | |
| 420 | - | |
| 421 | - /** | |
| 422 | - * Creates a new contract with a given value. | |
| 423 | - * @param {integer} valueOffset the offset in memory to the value from | |
| 424 | - * @param {integer} dataOffset the offset to load the code for the new contract from | |
| 425 | - * @param {integer} length the data length | |
| 426 | - * @param (integer} resultOffset the offset to write the new contract address to | |
| 427 | - * @return {integer} Return 1 or 0 depending on if the VM trapped on the message or not | |
| 428 | - */ | |
| 429 | - create (valueOffset, dataOffset, length, resultOffset, cbIndex) { | |
| 430 | - this.takeGas(32000) | |
| 431 | - | |
| 432 | - const value = U256.fromMemory(this.getMemory(valueOffset, U128_SIZE_BYTES)) | |
| 433 | - // if (length) { | |
| 434 | - // const code = this.getMemory(dataOffset, length).slice(0) | |
| 435 | - // } | |
| 436 | - | |
| 437 | - let opPromise | |
| 438 | - | |
| 439 | - if (value.gt(this.kernel.environment.value)) { | |
| 440 | - opPromise = Promise.resolve(new Buffer(20).fill(0)) | |
| 441 | - } else { | |
| 442 | - // todo actully run the code | |
| 443 | - opPromise = Promise.resolve(ethUtil.generateAddress(this.kernel.environment.address, this.kernel.environment.nonce)) | |
| 444 | - } | |
| 445 | - | |
| 446 | - // wait for all the prevouse async ops to finish before running the callback | |
| 447 | - this.kernel.pushOpsQueue(opPromise, cbIndex, address => { | |
| 448 | - this.setMemory(resultOffset, ADDRESS_SIZE_BYTES, address) | |
| 449 | - }) | |
| 450 | - } | |
| 451 | - | |
| 452 | - /** | |
| 453 | - * Sends a message with arbiatary data to a given address path | |
| 454 | - * @param {integer} addressOffset the offset to load the address path from | |
| 455 | - * @param {integer} valueOffset the offset to load the value from | |
| 456 | - * @param {integer} dataOffset the offset to load data from | |
| 457 | - * @param {integer} dataLength the length of data | |
| 458 | - * @param {integer} resultOffset the offset to store the result data at | |
| 459 | - * @param {integer} resultLength | |
| 460 | - * @param {integer} gas | |
| 461 | - * @return {integer} Returns 1 or 0 depending on if the VM trapped on the message or not | |
| 462 | - */ | |
| 463 | - _call (gasHigh, gasLow, addressOffset, valueOffset, dataOffset, dataLength, resultOffset, resultLength, cbIndex) { | |
| 464 | - this.takeGas(40) | |
| 465 | - | |
| 466 | - const gas = from64bit(gasHigh, gasLow) | |
| 467 | - // Load the params from mem | |
| 468 | - const address = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES)] | |
| 469 | - const value = new U256(this.getMemory(valueOffset, U128_SIZE_BYTES)) | |
| 470 | - | |
| 471 | - // Special case for non-zero value; why does this exist? | |
| 472 | - if (!value.isZero()) { | |
| 473 | - this.takeGas(9000 - 2300 + gas) | |
| 474 | - this.takeGas(-gas) | |
| 475 | - } | |
| 476 | - | |
| 477 | - let opPromise = this.kernel.environment.state.root.get(address) | |
| 478 | - .catch(() => { | |
| 479 | - // why does this exist? | |
| 480 | - this.takeGas(25000) | |
| 481 | - }) | |
| 482 | - | |
| 483 | - // wait for all the prevouse async ops to finish before running the callback | |
| 484 | - this.kernel.pushOpsQueue(opPromise, cbIndex, () => { | |
| 485 | - return 1 | |
| 486 | - }) | |
| 487 | - } | |
| 488 | - | |
| 489 | - /** | |
| 490 | - * Message-call into this account with an alternative account’s code. | |
| 491 | - * @param {integer} addressOffset the offset to load the address path from | |
| 492 | - * @param {integer} valueOffset the offset to load the value from | |
| 493 | - * @param {integer} dataOffset the offset to load data from | |
| 494 | - * @param {integer} dataLength the length of data | |
| 495 | - * @param {integer} resultOffset the offset to store the result data at | |
| 496 | - * @param {integer} resultLength | |
| 497 | - * @param {integer} gas | |
| 498 | - * @return {integer} Returns 1 or 0 depending on if the VM trapped on the message or not | |
| 499 | - */ | |
| 500 | - callCode (gas, addressOffset, valueOffset, dataOffset, dataLength, resultOffset, resultLength, cbIndex) { | |
| 501 | - this.takeGas(40) | |
| 502 | - // Load the params from mem | |
| 503 | - const path = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'code'] | |
| 504 | - const value = U256.fromMemory(this.getMemory(valueOffset, U128_SIZE_BYTES)) | |
| 505 | - | |
| 506 | - // Special case for non-zero value; why does this exist? | |
| 507 | - if (!value.isZero()) { | |
| 508 | - this.takeGas(6700) | |
| 509 | - } | |
| 510 | - | |
| 511 | - // TODO: should be message? | |
| 512 | - const opPromise = this.kernel.environment.state.root.get(path) | |
| 513 | - .catch(() => { | |
| 514 | - // TODO: handle errors | |
| 515 | - // the value was not found | |
| 516 | - return null | |
| 517 | - }) | |
| 518 | - | |
| 519 | - this.kernel.pushOpsQueue(opPromise, cbIndex, oldValue => { | |
| 520 | - return 1 | |
| 521 | - }) | |
| 522 | - } | |
| 523 | - | |
| 524 | - /** | |
| 525 | - * Message-call into this account with an alternative account’s code, but | |
| 526 | - * persisting the current values for sender and value. | |
| 527 | - * @param {integer} gas | |
| 528 | - * @param {integer} addressOffset the offset to load the address path from | |
| 529 | - * @param {integer} valueOffset the offset to load the value from | |
| 530 | - * @param {integer} dataOffset the offset to load data from | |
| 531 | - * @param {integer} dataLength the length of data | |
| 532 | - * @param {integer} resultOffset the offset to store the result data at | |
| 533 | - * @param {integer} resultLength | |
| 534 | - * @return {integer} Returns 1 or 0 depending on if the VM trapped on the message or not | |
| 535 | - */ | |
| 536 | - callDelegate (gas, addressOffset, dataOffset, dataLength, resultOffset, resultLength) { | |
| 537 | - // FIXME: count properly | |
| 538 | - this.takeGas(40) | |
| 539 | - | |
| 540 | - const data = this.getMemory(dataOffset, dataLength).slice(0) | |
| 541 | - const address = [...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES)] | |
| 542 | - const [errorCode, result] = this.environment.callDelegate(gas, address, data) | |
| 543 | - this.setMemory(resultOffset, resultLength, result) | |
| 544 | - return errorCode | |
| 545 | - } | |
| 546 | - | |
| 547 | - /** | |
| 548 | - * store a value at a given path in long term storage which are both loaded | |
| 549 | - * from Memory | |
| 550 | - * @param {interger} pathOffest the memory offset to load the the path from | |
| 551 | - * @param {interger} valueOffset the memory offset to load the value from | |
| 552 | - */ | |
| 553 | - storageStore (pathOffset, valueOffset, cbIndex) { | |
| 554 | - this.takeGas(5000) | |
| 555 | - const path = ['storage', ...this.getMemory(pathOffset, U256_SIZE_BYTES)] | |
| 556 | - // copy the value | |
| 557 | - const value = this.getMemory(valueOffset, U256_SIZE_BYTES).slice(0) | |
| 558 | - const valIsZero = value.every((i) => i === 0) | |
| 559 | - const opPromise = this.kernel.environment.state.get(path) | |
| 560 | - .then(vertex => vertex.value) | |
| 561 | - .catch(() => null) | |
| 562 | - | |
| 563 | - this.kernel.pushOpsQueue(opPromise, cbIndex, oldValue => { | |
| 564 | - if (valIsZero && oldValue) { | |
| 565 | - // delete a value | |
| 566 | - this.kernel.environment.gasRefund += 15000 | |
| 567 | - this.kernel.environment.state.del(path) | |
| 568 | - } else { | |
| 569 | - if (!valIsZero && !oldValue) { | |
| 570 | - // creating a new value | |
| 571 | - this.takeGas(15000) | |
| 572 | - } | |
| 573 | - // update | |
| 574 | - this.kernel.environment.state.set(path, new Vertex({ | |
| 575 | - value: value | |
| 576 | - })) | |
| 577 | - } | |
| 578 | - }) | |
| 579 | - } | |
| 580 | - | |
| 581 | - /** | |
| 582 | - * reterives a value at a given path in long term storage | |
| 583 | - * @param {interger} pathOffest the memory offset to load the the path from | |
| 584 | - * @param {interger} resultOffset the memory offset to load the value from | |
| 585 | - */ | |
| 586 | - storageLoad (pathOffset, resultOffset, cbIndex) { | |
| 587 | - this.takeGas(50) | |
| 588 | - | |
| 589 | - // convert the path to an array | |
| 590 | - const path = ['storage', ...this.getMemory(pathOffset, U256_SIZE_BYTES)] | |
| 591 | - // get the value from the state | |
| 592 | - const opPromise = this.kernel.environment.state.get(path) | |
| 593 | - .then(vertex => vertex.value) | |
| 594 | - .catch(() => new Uint8Array(32)) | |
| 595 | - | |
| 596 | - this.kernel.pushOpsQueue(opPromise, cbIndex, value => { | |
| 597 | - this.setMemory(resultOffset, U256_SIZE_BYTES, value) | |
| 598 | - }) | |
| 599 | - } | |
| 600 | - | |
| 601 | - /** | |
| 602 | - * Halt execution returning output data. | |
| 603 | - * @param {integer} offset the offset of the output data. | |
| 604 | - * @param {integer} length the length of the output data. | |
| 605 | - */ | |
| 606 | - return (offset, length) { | |
| 607 | - if (length) { | |
| 608 | - this.kernel.environment.returnValue = this.getMemory(offset, length).slice(0) | |
| 609 | - } | |
| 610 | - } | |
| 611 | - | |
| 612 | - /** | |
| 613 | - * Halt execution and register account for later deletion giving the remaining | |
| 614 | - * balance to an address path | |
| 615 | - * @param {integer} offset the offset to load the address from | |
| 616 | - */ | |
| 617 | - selfDestruct (addressOffset) { | |
| 618 | - this.kernel.environment.selfDestruct = true | |
| 619 | - this.kernel.environment.selfDestructAddress = this.getMemory(addressOffset, ADDRESS_SIZE_BYTES) | |
| 620 | - this.kernel.environment.gasRefund += 24000 | |
| 621 | - } | |
| 622 | - | |
| 623 | - getMemory (offset, length) { | |
| 624 | - return new Uint8Array(this.kernel.memory, offset, length) | |
| 625 | - } | |
| 626 | - | |
| 627 | - setMemory (offset, length, value) { | |
| 628 | - const memory = new Uint8Array(this.kernel.memory, offset, length) | |
| 629 | - memory.set(value) | |
| 630 | - } | |
| 631 | - | |
| 632 | - /* | |
| 633 | - * Takes gas from the tank. Only needs to check if there's gas left to be taken, | |
| 634 | - * because every caller of this method is trusted. | |
| 635 | - */ | |
| 636 | - takeGas (amount) { | |
| 637 | - if (this.kernel.environment.gasLeft < amount) { | |
| 638 | - throw new Error('Ran out of gas') | |
| 639 | - } | |
| 640 | - this.kernel.environment.gasLeft -= amount | |
| 641 | - } | |
| 642 | -} | |
| 643 | - | |
| 644 | -// converts a 64 bit number to a JS number | |
| 645 | -function from64bit (high, low) { | |
| 646 | - if (high < 0) { | |
| 647 | - // convert from a 32-bit two's compliment | |
| 648 | - high = 0x100000000 - high | |
| 649 | - } | |
| 650 | - if (low < 0) { | |
| 651 | - // convert from a 32-bit two's compliment | |
| 652 | - low = 0x100000000 - low | |
| 653 | - } | |
| 654 | - // JS only bitshift 32bits, so instead of high << 32 we have high * 2 ^ 32 | |
| 655 | - return (high * 4294967296) + low | |
| 656 | -} | |
| EVMinterface.js | ||
|---|---|---|
| @@ -1,0 +1,661 @@ | ||
| 1 | +/** | |
| 2 | + * This is the Ethereum interface that is exposed to the WASM instance which | |
| 3 | + * enables to interact with the Ethereum Environment | |
| 4 | + */ | |
| 5 | +const fs = require('fs') | |
| 6 | +const path = require('path') | |
| 7 | +const ethUtil = require('ethereumjs-util') | |
| 8 | +const Vertex = require('merkle-trie') | |
| 9 | +const U256 = require('./deps/u256.js') | |
| 10 | + | |
| 11 | +const U128_SIZE_BYTES = 16 | |
| 12 | +const ADDRESS_SIZE_BYTES = 20 | |
| 13 | +const U256_SIZE_BYTES = 32 | |
| 14 | + | |
| 15 | +// The interface exposed to the WebAessembly VM | |
| 16 | +module.exports = class Interface { | |
| 17 | + constructor (kernel) { | |
| 18 | + this.kernel = kernel | |
| 19 | + const shimBin = fs.readFileSync(path.join(__dirname, '/wasm/interface.wasm')) | |
| 20 | + const shimMod = WebAssembly.Module(shimBin) | |
| 21 | + this.shims = WebAssembly.Instance(shimMod, { | |
| 22 | + 'interface': { | |
| 23 | + 'useGas': this._useGas.bind(this), | |
| 24 | + 'getGasLeftHigh': this._getGasLeftHigh.bind(this), | |
| 25 | + 'getGasLeftLow': this._getGasLeftLow.bind(this), | |
| 26 | + 'call': this._call.bind(this) | |
| 27 | + } | |
| 28 | + }) | |
| 29 | + } | |
| 30 | + | |
| 31 | + async initialize (state) { | |
| 32 | + this.block = await state.root.get(['block']) | |
| 33 | + // this.blockchain = await state.get(['blockchain']) | |
| 34 | + } | |
| 35 | + | |
| 36 | + static get name () { | |
| 37 | + return 'ethereum' | |
| 38 | + } | |
| 39 | + | |
| 40 | + get exports () { | |
| 41 | + let exportMethods = [ | |
| 42 | + // include all the public methods according to the Ethereum Environment Interface (EEI) r1 | |
| 43 | + 'getAddress', | |
| 44 | + 'getBalance', | |
| 45 | + 'getTxOrigin', | |
| 46 | + 'getCaller', | |
| 47 | + 'getCallValue', | |
| 48 | + 'getCallDataSize', | |
| 49 | + 'callDataCopy', | |
| 50 | + 'callDataCopy256', | |
| 51 | + 'getCodeSize', | |
| 52 | + 'codeCopy', | |
| 53 | + 'getExternalCodeSize', | |
| 54 | + 'externalCodeCopy', | |
| 55 | + 'getTxGasPrice', | |
| 56 | + 'getBlockHash', | |
| 57 | + 'getBlockCoinbase', | |
| 58 | + 'getBlockTimestamp', | |
| 59 | + 'getBlockNumber', | |
| 60 | + 'getBlockDifficulty', | |
| 61 | + 'getBlockGasLimit', | |
| 62 | + 'log', | |
| 63 | + 'create', | |
| 64 | + 'callCode', | |
| 65 | + 'callDelegate', | |
| 66 | + 'storageStore', | |
| 67 | + 'storageLoad', | |
| 68 | + 'return', | |
| 69 | + 'selfDestruct' | |
| 70 | + ] | |
| 71 | + let ret = {} | |
| 72 | + exportMethods.forEach((method) => { | |
| 73 | + ret[method] = this[method].bind(this) | |
| 74 | + }) | |
| 75 | + | |
| 76 | + // add shims | |
| 77 | + ret.useGas = this.shims.exports.useGas | |
| 78 | + ret.getGasLeft = this.shims.exports.getGasLeft | |
| 79 | + ret.call = this.shims.exports.call | |
| 80 | + return ret | |
| 81 | + } | |
| 82 | + | |
| 83 | + setModule (mod) { | |
| 84 | + this.module = mod | |
| 85 | + } | |
| 86 | + | |
| 87 | + /** | |
| 88 | + * Subtracts an amount to the gas counter | |
| 89 | + * @param {integer} amount the amount to subtract to the gas counter | |
| 90 | + */ | |
| 91 | + _useGas (high, low) { | |
| 92 | + this.takeGas(from64bit(high, low)) | |
| 93 | + } | |
| 94 | + | |
| 95 | + /** | |
| 96 | + * Returns the current amount of gas | |
| 97 | + * @return {integer} | |
| 98 | + */ | |
| 99 | + _getGasLeftHigh () { | |
| 100 | + return Math.floor(this.kernel.environment.gasLeft / 4294967296) | |
| 101 | + } | |
| 102 | + | |
| 103 | + /** | |
| 104 | + * Returns the current amount of gas | |
| 105 | + * @return {integer} | |
| 106 | + */ | |
| 107 | + _getGasLeftLow () { | |
| 108 | + return this.kernel.environment.gasLeft | |
| 109 | + } | |
| 110 | + | |
| 111 | + /** | |
| 112 | + * Gets address of currently executing account and loads it into memory at | |
| 113 | + * the given offset. | |
| 114 | + * @param {integer} offset | |
| 115 | + */ | |
| 116 | + getAddress (offset) { | |
| 117 | + this.takeGas(2) | |
| 118 | + | |
| 119 | + this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.address.toMemory()) | |
| 120 | + } | |
| 121 | + | |
| 122 | + /** | |
| 123 | + * Gets balance of the given account and loads it into memory at the given | |
| 124 | + * offset. | |
| 125 | + * @param {integer} addressOffset the memory offset to laod the address | |
| 126 | + * @param {integer} resultOffset | |
| 127 | + */ | |
| 128 | + getBalance (addressOffset, offset, cbIndex) { | |
| 129 | + this.takeGas(20) | |
| 130 | + | |
| 131 | + const path = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'balance'] | |
| 132 | + const opPromise = this.kernel.environment.state.root.get(path) | |
| 133 | + .then(vertex => new U256(vertex.value)) | |
| 134 | + .catch(() => new U256(0)) | |
| 135 | + | |
| 136 | + this.kernel.pushOpsQueue(opPromise, cbIndex, balance => { | |
| 137 | + this.setMemory(offset, U128_SIZE_BYTES, balance.toMemory(U128_SIZE_BYTES)) | |
| 138 | + }) | |
| 139 | + } | |
| 140 | + | |
| 141 | + /** | |
| 142 | + * Gets the execution's origination address and loads it into memory at the | |
| 143 | + * given offset. This is the sender of original transaction; it is never an | |
| 144 | + * account with non-empty associated code. | |
| 145 | + * @param {integer} offset | |
| 146 | + */ | |
| 147 | + getTxOrigin (offset) { | |
| 148 | + this.takeGas(2) | |
| 149 | + | |
| 150 | + this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.origin.toMemory()) | |
| 151 | + } | |
| 152 | + | |
| 153 | + /** | |
| 154 | + * Gets caller address and loads it into memory at the given offset. This is | |
| 155 | + * the address of the account that is directly responsible for this execution. | |
| 156 | + * @param {integer} offset | |
| 157 | + */ | |
| 158 | + getCaller (offset) { | |
| 159 | + this.takeGas(2) | |
| 160 | + | |
| 161 | + this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.caller.toMemory()) | |
| 162 | + } | |
| 163 | + | |
| 164 | + /** | |
| 165 | + * Gets the deposited value by the instruction/transaction responsible for | |
| 166 | + * this execution and loads it into memory at the given location. | |
| 167 | + * @param {integer} offset | |
| 168 | + */ | |
| 169 | + getCallValue (offset) { | |
| 170 | + this.takeGas(2) | |
| 171 | + | |
| 172 | + this.setMemory(offset, U128_SIZE_BYTES, this.kernel.environment.callValue.toMemory(U128_SIZE_BYTES)) | |
| 173 | + } | |
| 174 | + | |
| 175 | + /** | |
| 176 | + * Get size of input data in current environment. This pertains to the input | |
| 177 | + * data passed with the message call instruction or transaction. | |
| 178 | + * @return {integer} | |
| 179 | + */ | |
| 180 | + getCallDataSize () { | |
| 181 | + this.takeGas(2) | |
| 182 | + | |
| 183 | + return this.kernel.environment.callData.length | |
| 184 | + } | |
| 185 | + | |
| 186 | + /** | |
| 187 | + * Copys the input data in current environment to memory. This pertains to | |
| 188 | + * the input data passed with the message call instruction or transaction. | |
| 189 | + * @param {integer} offset the offset in memory to load into | |
| 190 | + * @param {integer} dataOffset the offset in the input data | |
| 191 | + * @param {integer} length the length of data to copy | |
| 192 | + */ | |
| 193 | + callDataCopy (offset, dataOffset, length) { | |
| 194 | + this.takeGas(3 + Math.ceil(length / 32) * 3) | |
| 195 | + | |
| 196 | + if (length) { | |
| 197 | + const callData = this.kernel.environment.callData.slice(dataOffset, dataOffset + length) | |
| 198 | + this.setMemory(offset, length, callData) | |
| 199 | + } | |
| 200 | + } | |
| 201 | + | |
| 202 | + /** | |
| 203 | + * Copys the input data in current environment to memory. This pertains to | |
| 204 | + * the input data passed with the message call instruction or transaction. | |
| 205 | + * @param {integer} offset the offset in memory to load into | |
| 206 | + * @param {integer} dataOffset the offset in the input data | |
| 207 | + */ | |
| 208 | + callDataCopy256 (offset, dataOffset) { | |
| 209 | + this.takeGas(3) | |
| 210 | + const callData = this.kernel.environment.callData.slice(dataOffset, dataOffset + 32) | |
| 211 | + this.setMemory(offset, U256_SIZE_BYTES, callData) | |
| 212 | + } | |
| 213 | + | |
| 214 | + /** | |
| 215 | + * Gets the size of code running in current environment. | |
| 216 | + * @return {interger} | |
| 217 | + */ | |
| 218 | + getCodeSize (cbIndex) { | |
| 219 | + this.takeGas(2) | |
| 220 | + | |
| 221 | + const opPromise = this.kernel.environment.state | |
| 222 | + .get('code') | |
| 223 | + .then(vertex => vertex.value.length) | |
| 224 | + | |
| 225 | + // wait for all the prevouse async ops to finish before running the callback | |
| 226 | + this.kernel.pushOpsQueue(opPromise, cbIndex, length => length) | |
| 227 | + } | |
| 228 | + | |
| 229 | + /** | |
| 230 | + * Copys the code running in current environment to memory. | |
| 231 | + * @param {integer} offset the memory offset | |
| 232 | + * @param {integer} codeOffset the code offset | |
| 233 | + * @param {integer} length the length of code to copy | |
| 234 | + */ | |
| 235 | + codeCopy (resultOffset, codeOffset, length, cbIndex) { | |
| 236 | + this.takeGas(3 + Math.ceil(length / 32) * 3) | |
| 237 | + | |
| 238 | + let opPromise | |
| 239 | + | |
| 240 | + if (length) { | |
| 241 | + opPromise = this.kernel.environment.state | |
| 242 | + .get('code') | |
| 243 | + .then(vertex => vertex.value) | |
| 244 | + } else { | |
| 245 | + opPromise = Promise.resolve([]) | |
| 246 | + } | |
| 247 | + | |
| 248 | + // wait for all the prevouse async ops to finish before running the callback | |
| 249 | + this.kernel.pushOpsQueue(opPromise, cbIndex, code => { | |
| 250 | + if (code.length) { | |
| 251 | + code = code.slice(codeOffset, codeOffset + length) | |
| 252 | + this.setMemory(resultOffset, length, code) | |
| 253 | + } | |
| 254 | + }) | |
| 255 | + } | |
| 256 | + | |
| 257 | + /** | |
| 258 | + * Get size of an account’s code. | |
| 259 | + * @param {integer} addressOffset the offset in memory to load the address from | |
| 260 | + * @return {integer} | |
| 261 | + */ | |
| 262 | + getExternalCodeSize (addressOffset, cbOffset) { | |
| 263 | + this.takeGas(20) | |
| 264 | + const address = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'code'] | |
| 265 | + const opPromise = this.kernel.environment.state.root | |
| 266 | + .get(address) | |
| 267 | + .then(vertex => vertex.value.length) | |
| 268 | + .catch(() => 0) | |
| 269 | + | |
| 270 | + // wait for all the prevouse async ops to finish before running the callback | |
| 271 | + this.kernel.pushOpsQueue(opPromise, cbOffset, length => length) | |
| 272 | + } | |
| 273 | + | |
| 274 | + /** | |
| 275 | + * Copys the code of an account to memory. | |
| 276 | + * @param {integer} addressOffset the memory offset of the address | |
| 277 | + * @param {integer} resultOffset the memory offset | |
| 278 | + * @param {integer} codeOffset the code offset | |
| 279 | + * @param {integer} length the length of code to copy | |
| 280 | + */ | |
| 281 | + externalCodeCopy (addressOffset, resultOffset, codeOffset, length, cbIndex) { | |
| 282 | + this.takeGas(20 + Math.ceil(length / 32) * 3) | |
| 283 | + | |
| 284 | + const address = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'code'] | |
| 285 | + let opPromise | |
| 286 | + | |
| 287 | + if (length) { | |
| 288 | + opPromise = this.kernel.environment.state.root | |
| 289 | + .get(address) | |
| 290 | + .then(vertex => vertex.value) | |
| 291 | + .catch(() => []) | |
| 292 | + } else { | |
| 293 | + opPromise = Promise.resolve([]) | |
| 294 | + } | |
| 295 | + | |
| 296 | + // wait for all the prevouse async ops to finish before running the callback | |
| 297 | + this.kernel.pushOpsQueue(opPromise, cbIndex, code => { | |
| 298 | + if (code.length) { | |
| 299 | + code = code.slice(codeOffset, codeOffset + length) | |
| 300 | + this.setMemory(resultOffset, length, code) | |
| 301 | + } | |
| 302 | + }) | |
| 303 | + } | |
| 304 | + | |
| 305 | + /** | |
| 306 | + * Gets price of gas in current environment. | |
| 307 | + * @return {integer} | |
| 308 | + */ | |
| 309 | + getTxGasPrice () { | |
| 310 | + this.takeGas(2) | |
| 311 | + | |
| 312 | + return this.kernel.environment.gasPrice | |
| 313 | + } | |
| 314 | + | |
| 315 | + /** | |
| 316 | + * Gets the hash of one of the 256 most recent complete blocks. | |
| 317 | + * @param {integer} number which block to load | |
| 318 | + * @param {integer} offset the offset to load the hash into | |
| 319 | + */ | |
| 320 | + getBlockHash (number, offset, cbOffset) { | |
| 321 | + this.takeGas(20) | |
| 322 | + | |
| 323 | + const diff = this.kernel.environment.block.number - number | |
| 324 | + let opPromise | |
| 325 | + | |
| 326 | + if (diff > 256 || diff <= 0) { | |
| 327 | + opPromise = Promise.resolve(new U256(0)) | |
| 328 | + } else { | |
| 329 | + opPromise = this.kernel.environment.getBlockHash(number) | |
| 330 | + } | |
| 331 | + | |
| 332 | + // wait for all the prevouse async ops to finish before running the callback | |
| 333 | + this.kernel.pushOpsQueue(opPromise, cbOffset, hash => { | |
| 334 | + this.setMemory(offset, U256_SIZE_BYTES, hash.toMemory()) | |
| 335 | + }) | |
| 336 | + } | |
| 337 | + | |
| 338 | + /** | |
| 339 | + * Gets the block’s beneficiary address and loads into memory. | |
| 340 | + * @param offset | |
| 341 | + */ | |
| 342 | + getBlockCoinbase (offset) { | |
| 343 | + this.takeGas(2) | |
| 344 | + | |
| 345 | + this.setMemory(offset, ADDRESS_SIZE_BYTES, this.kernel.environment.block.header.coinbase) | |
| 346 | + } | |
| 347 | + | |
| 348 | + /** | |
| 349 | + * Get the block’s timestamp. | |
| 350 | + * @return {integer} | |
| 351 | + */ | |
| 352 | + getBlockTimestamp () { | |
| 353 | + this.takeGas(2) | |
| 354 | + | |
| 355 | + return this.kernel.environment.block.timestamp | |
| 356 | + } | |
| 357 | + | |
| 358 | + /** | |
| 359 | + * Get the block’s number. | |
| 360 | + * @return {integer} | |
| 361 | + */ | |
| 362 | + getBlockNumber () { | |
| 363 | + this.takeGas(2) | |
| 364 | + | |
| 365 | + return this.kernel.environment.block.number | |
| 366 | + } | |
| 367 | + | |
| 368 | + /** | |
| 369 | + * Get the block’s difficulty. | |
| 370 | + * @return {integer} | |
| 371 | + */ | |
| 372 | + getBlockDifficulty (offset) { | |
| 373 | + this.takeGas(2) | |
| 374 | + | |
| 375 | + this.setMemory(offset, U256_SIZE_BYTES, this.kernel.environment.block.difficulty.toMemory()) | |
| 376 | + } | |
| 377 | + | |
| 378 | + /** | |
| 379 | + * Get the block’s gas limit. | |
| 380 | + * @return {integer} | |
| 381 | + */ | |
| 382 | + getBlockGasLimit () { | |
| 383 | + this.takeGas(2) | |
| 384 | + | |
| 385 | + return this.kernel.environment.block.gasLimit | |
| 386 | + } | |
| 387 | + | |
| 388 | + /** | |
| 389 | + * Creates a new log in the current environment | |
| 390 | + * @param {integer} dataOffset the offset in memory to load the memory | |
| 391 | + * @param {integer} length the data length | |
| 392 | + * @param {integer} number of topics | |
| 393 | + */ | |
| 394 | + log (dataOffset, length, numberOfTopics, topic1, topic2, topic3, topic4) { | |
| 395 | + if (numberOfTopics < 0 || numberOfTopics > 4) { | |
| 396 | + throw new Error('Invalid numberOfTopics') | |
| 397 | + } | |
| 398 | + | |
| 399 | + this.takeGas(375 + length * 8 + numberOfTopics * 375) | |
| 400 | + | |
| 401 | + const data = length ? this.getMemory(dataOffset, length).slice(0) : new Uint8Array([]) | |
| 402 | + const topics = [] | |
| 403 | + | |
| 404 | + if (numberOfTopics > 0) { | |
| 405 | + topics.push(U256.fromMemory(this.getMemory(topic1, U256_SIZE_BYTES))) | |
| 406 | + } | |
| 407 | + | |
| 408 | + if (numberOfTopics > 1) { | |
| 409 | + topics.push(U256.fromMemory(this.getMemory(topic2, U256_SIZE_BYTES))) | |
| 410 | + } | |
| 411 | + | |
| 412 | + if (numberOfTopics > 2) { | |
| 413 | + topics.push(U256.fromMemory(this.getMemory(topic3, U256_SIZE_BYTES))) | |
| 414 | + } | |
| 415 | + | |
| 416 | + if (numberOfTopics > 3) { | |
| 417 | + topics.push(U256.fromMemory(this.getMemory(topic4, U256_SIZE_BYTES))) | |
| 418 | + } | |
| 419 | + | |
| 420 | + this.kernel.environment.logs.push({ | |
| 421 | + data: data, | |
| 422 | + topics: topics | |
| 423 | + }) | |
| 424 | + } | |
| 425 | + | |
| 426 | + /** | |
| 427 | + * Creates a new contract with a given value. | |
| 428 | + * @param {integer} valueOffset the offset in memory to the value from | |
| 429 | + * @param {integer} dataOffset the offset to load the code for the new contract from | |
| 430 | + * @param {integer} length the data length | |
| 431 | + * @param (integer} resultOffset the offset to write the new contract address to | |
| 432 | + * @return {integer} Return 1 or 0 depending on if the VM trapped on the message or not | |
| 433 | + */ | |
| 434 | + create (valueOffset, dataOffset, length, resultOffset, cbIndex) { | |
| 435 | + this.takeGas(32000) | |
| 436 | + | |
| 437 | + const value = U256.fromMemory(this.getMemory(valueOffset, U128_SIZE_BYTES)) | |
| 438 | + // if (length) { | |
| 439 | + // const code = this.getMemory(dataOffset, length).slice(0) | |
| 440 | + // } | |
| 441 | + | |
| 442 | + let opPromise | |
| 443 | + | |
| 444 | + if (value.gt(this.kernel.environment.value)) { | |
| 445 | + opPromise = Promise.resolve(new Buffer(20).fill(0)) | |
| 446 | + } else { | |
| 447 | + // todo actully run the code | |
| 448 | + opPromise = Promise.resolve(ethUtil.generateAddress(this.kernel.environment.address, this.kernel.environment.nonce)) | |
| 449 | + } | |
| 450 | + | |
| 451 | + // wait for all the prevouse async ops to finish before running the callback | |
| 452 | + this.kernel.pushOpsQueue(opPromise, cbIndex, address => { | |
| 453 | + this.setMemory(resultOffset, ADDRESS_SIZE_BYTES, address) | |
| 454 | + }) | |
| 455 | + } | |
| 456 | + | |
| 457 | + /** | |
| 458 | + * Sends a message with arbiatary data to a given address path | |
| 459 | + * @param {integer} addressOffset the offset to load the address path from | |
| 460 | + * @param {integer} valueOffset the offset to load the value from | |
| 461 | + * @param {integer} dataOffset the offset to load data from | |
| 462 | + * @param {integer} dataLength the length of data | |
| 463 | + * @param {integer} resultOffset the offset to store the result data at | |
| 464 | + * @param {integer} resultLength | |
| 465 | + * @param {integer} gas | |
| 466 | + * @return {integer} Returns 1 or 0 depending on if the VM trapped on the message or not | |
| 467 | + */ | |
| 468 | + _call (gasHigh, gasLow, addressOffset, valueOffset, dataOffset, dataLength, resultOffset, resultLength, cbIndex) { | |
| 469 | + this.takeGas(40) | |
| 470 | + | |
| 471 | + const gas = from64bit(gasHigh, gasLow) | |
| 472 | + // Load the params from mem | |
| 473 | + const address = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES)] | |
| 474 | + const value = new U256(this.getMemory(valueOffset, U128_SIZE_BYTES)) | |
| 475 | + | |
| 476 | + // Special case for non-zero value; why does this exist? | |
| 477 | + if (!value.isZero()) { | |
| 478 | + this.takeGas(9000 - 2300 + gas) | |
| 479 | + this.takeGas(-gas) | |
| 480 | + } | |
| 481 | + | |
| 482 | + let opPromise = this.kernel.environment.state.root.get(address) | |
| 483 | + .catch(() => { | |
| 484 | + // why does this exist? | |
| 485 | + this.takeGas(25000) | |
| 486 | + }) | |
| 487 | + | |
| 488 | + // wait for all the prevouse async ops to finish before running the callback | |
| 489 | + this.kernel.pushOpsQueue(opPromise, cbIndex, () => { | |
| 490 | + return 1 | |
| 491 | + }) | |
| 492 | + } | |
| 493 | + | |
| 494 | + /** | |
| 495 | + * Message-call into this account with an alternative account’s code. | |
| 496 | + * @param {integer} addressOffset the offset to load the address path from | |
| 497 | + * @param {integer} valueOffset the offset to load the value from | |
| 498 | + * @param {integer} dataOffset the offset to load data from | |
| 499 | + * @param {integer} dataLength the length of data | |
| 500 | + * @param {integer} resultOffset the offset to store the result data at | |
| 501 | + * @param {integer} resultLength | |
| 502 | + * @param {integer} gas | |
| 503 | + * @return {integer} Returns 1 or 0 depending on if the VM trapped on the message or not | |
| 504 | + */ | |
| 505 | + callCode (gas, addressOffset, valueOffset, dataOffset, dataLength, resultOffset, resultLength, cbIndex) { | |
| 506 | + this.takeGas(40) | |
| 507 | + // Load the params from mem | |
| 508 | + const path = ['accounts', ...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES), 'code'] | |
| 509 | + const value = U256.fromMemory(this.getMemory(valueOffset, U128_SIZE_BYTES)) | |
| 510 | + | |
| 511 | + // Special case for non-zero value; why does this exist? | |
| 512 | + if (!value.isZero()) { | |
| 513 | + this.takeGas(6700) | |
| 514 | + } | |
| 515 | + | |
| 516 | + // TODO: should be message? | |
| 517 | + const opPromise = this.kernel.environment.state.root.get(path) | |
| 518 | + .catch(() => { | |
| 519 | + // TODO: handle errors | |
| 520 | + // the value was not found | |
| 521 | + return null | |
| 522 | + }) | |
| 523 | + | |
| 524 | + this.kernel.pushOpsQueue(opPromise, cbIndex, oldValue => { | |
| 525 | + return 1 | |
| 526 | + }) | |
| 527 | + } | |
| 528 | + | |
| 529 | + /** | |
| 530 | + * Message-call into this account with an alternative account’s code, but | |
| 531 | + * persisting the current values for sender and value. | |
| 532 | + * @param {integer} gas | |
| 533 | + * @param {integer} addressOffset the offset to load the address path from | |
| 534 | + * @param {integer} valueOffset the offset to load the value from | |
| 535 | + * @param {integer} dataOffset the offset to load data from | |
| 536 | + * @param {integer} dataLength the length of data | |
| 537 | + * @param {integer} resultOffset the offset to store the result data at | |
| 538 | + * @param {integer} resultLength | |
| 539 | + * @return {integer} Returns 1 or 0 depending on if the VM trapped on the message or not | |
| 540 | + */ | |
| 541 | + callDelegate (gas, addressOffset, dataOffset, dataLength, resultOffset, resultLength) { | |
| 542 | + // FIXME: count properly | |
| 543 | + this.takeGas(40) | |
| 544 | + | |
| 545 | + const data = this.getMemory(dataOffset, dataLength).slice(0) | |
| 546 | + const address = [...this.getMemory(addressOffset, ADDRESS_SIZE_BYTES)] | |
| 547 | + const [errorCode, result] = this.environment.callDelegate(gas, address, data) | |
| 548 | + this.setMemory(resultOffset, resultLength, result) | |
| 549 | + return errorCode | |
| 550 | + } | |
| 551 | + | |
| 552 | + /** | |
| 553 | + * store a value at a given path in long term storage which are both loaded | |
| 554 | + * from Memory | |
| 555 | + * @param {interger} pathOffest the memory offset to load the the path from | |
| 556 | + * @param {interger} valueOffset the memory offset to load the value from | |
| 557 | + */ | |
| 558 | + storageStore (pathOffset, valueOffset, cbIndex) { | |
| 559 | + this.takeGas(5000) | |
| 560 | + const path = ['storage', ...this.getMemory(pathOffset, U256_SIZE_BYTES)] | |
| 561 | + // copy the value | |
| 562 | + const value = this.getMemory(valueOffset, U256_SIZE_BYTES).slice(0) | |
| 563 | + const valIsZero = value.every((i) => i === 0) | |
| 564 | + const opPromise = this.kernel.environment.state.get(path) | |
| 565 | + .then(vertex => vertex.value) | |
| 566 | + .catch(() => null) | |
| 567 | + | |
| 568 | + this.kernel.pushOpsQueue(opPromise, cbIndex, oldValue => { | |
| 569 | + if (valIsZero && oldValue) { | |
| 570 | + // delete a value | |
| 571 | + this.kernel.environment.gasRefund += 15000 | |
| 572 | + this.kernel.environment.state.del(path) | |
| 573 | + } else { | |
| 574 | + if (!valIsZero && !oldValue) { | |
| 575 | + // creating a new value | |
| 576 | + this.takeGas(15000) | |
| 577 | + } | |
| 578 | + // update | |
| 579 | + this.kernel.environment.state.set(path, new Vertex({ | |
| 580 | + value: value | |
| 581 | + })) | |
| 582 | + } | |
| 583 | + }) | |
| 584 | + } | |
| 585 | + | |
| 586 | + /** | |
| 587 | + * reterives a value at a given path in long term storage | |
| 588 | + * @param {interger} pathOffest the memory offset to load the the path from | |
| 589 | + * @param {interger} resultOffset the memory offset to load the value from | |
| 590 | + */ | |
| 591 | + storageLoad (pathOffset, resultOffset, cbIndex) { | |
| 592 | + this.takeGas(50) | |
| 593 | + | |
| 594 | + // convert the path to an array | |
| 595 | + const path = ['storage', ...this.getMemory(pathOffset, U256_SIZE_BYTES)] | |
| 596 | + // get the value from the state | |
| 597 | + const opPromise = this.kernel.environment.state.get(path) | |
| 598 | + .then(vertex => vertex.value) | |
| 599 | + .catch(() => new Uint8Array(32)) | |
| 600 | + | |
| 601 | + this.kernel.pushOpsQueue(opPromise, cbIndex, value => { | |
| 602 | + this.setMemory(resultOffset, U256_SIZE_BYTES, value) | |
| 603 | + }) | |
| 604 | + } | |
| 605 | + | |
| 606 | + /** | |
| 607 | + * Halt execution returning output data. | |
| 608 | + * @param {integer} offset the offset of the output data. | |
| 609 | + * @param {integer} length the length of the output data. | |
| 610 | + */ | |
| 611 | + return (offset, length) { | |
| 612 | + if (length) { | |
| 613 | + this.kernel.environment.returnValue = this.getMemory(offset, length).slice(0) | |
| 614 | + } | |
| 615 | + } | |
| 616 | + | |
| 617 | + /** | |
| 618 | + * Halt execution and register account for later deletion giving the remaining | |
| 619 | + * balance to an address path | |
| 620 | + * @param {integer} offset the offset to load the address from | |
| 621 | + */ | |
| 622 | + selfDestruct (addressOffset) { | |
| 623 | + this.kernel.environment.selfDestruct = true | |
| 624 | + this.kernel.environment.selfDestructAddress = this.getMemory(addressOffset, ADDRESS_SIZE_BYTES) | |
| 625 | + this.kernel.environment.gasRefund += 24000 | |
| 626 | + } | |
| 627 | + | |
| 628 | + getMemory (offset, length) { | |
| 629 | + return new Uint8Array(this.kernel.memory, offset, length) | |
| 630 | + } | |
| 631 | + | |
| 632 | + setMemory (offset, length, value) { | |
| 633 | + const memory = new Uint8Array(this.kernel.memory, offset, length) | |
| 634 | + memory.set(value) | |
| 635 | + } | |
| 636 | + | |
| 637 | + /* | |
| 638 | + * Takes gas from the tank. Only needs to check if there's gas left to be taken, | |
| 639 | + * because every caller of this method is trusted. | |
| 640 | + */ | |
| 641 | + takeGas (amount) { | |
| 642 | + if (this.kernel.environment.gasLeft < amount) { | |
| 643 | + throw new Error('Ran out of gas') | |
| 644 | + } | |
| 645 | + this.kernel.environment.gasLeft -= amount | |
| 646 | + } | |
| 647 | +} | |
| 648 | + | |
| 649 | +// converts a 64 bit number to a JS number | |
| 650 | +function from64bit (high, low) { | |
| 651 | + if (high < 0) { | |
| 652 | + // convert from a 32-bit two's compliment | |
| 653 | + high = 0x100000000 - high | |
| 654 | + } | |
| 655 | + if (low < 0) { | |
| 656 | + // convert from a 32-bit two's compliment | |
| 657 | + low = 0x100000000 - low | |
| 658 | + } | |
| 659 | + // JS only bitshift 32bits, so instead of high << 32 we have high * 2 ^ 32 | |
| 660 | + return (high * 4294967296) + low | |
| 661 | +} | |
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