ethereum.forks.bpo1.vm.instructions.environment
Ethereum Virtual Machine (EVM) Environmental Instructions.
.. contents:: Table of Contents :backlinks: none :local:
Introduction
Implementations of the EVM environment related instructions.
address ¶
Pushes the address of the current executing account to the stack.
Parameters
evm : The current EVM frame.
def address(evm: Evm) -> None:
| 42 | """ |
|---|---|
| 43 | Pushes the address of the current executing account to the stack. |
| 44 | |
| 45 | Parameters |
| 46 | ---------- |
| 47 | evm : |
| 48 | The current EVM frame. |
| 49 | |
| 50 | """ |
| 51 | # STACK |
| 52 | pass |
| 53 | |
| 54 | # GAS |
| 55 | charge_gas(evm, GAS_BASE) |
| 56 | |
| 57 | # OPERATION |
| 58 | push(evm.stack, U256.from_be_bytes(evm.message.current_target)) |
| 59 | |
| 60 | # PROGRAM COUNTER |
| 61 | evm.pc += Uint(1) |
balance ¶
Pushes the balance of the given account onto the stack.
Parameters
evm : The current EVM frame.
def balance(evm: Evm) -> None:
| 65 | """ |
|---|---|
| 66 | Pushes the balance of the given account onto the stack. |
| 67 | |
| 68 | Parameters |
| 69 | ---------- |
| 70 | evm : |
| 71 | The current EVM frame. |
| 72 | |
| 73 | """ |
| 74 | # STACK |
| 75 | address = to_address_masked(pop(evm.stack)) |
| 76 | |
| 77 | # GAS |
| 78 | if address in evm.accessed_addresses: |
| 79 | charge_gas(evm, GAS_WARM_ACCESS) |
| 80 | else: |
| 81 | evm.accessed_addresses.add(address) |
| 82 | charge_gas(evm, GAS_COLD_ACCOUNT_ACCESS) |
| 83 | |
| 84 | # OPERATION |
| 85 | # Non-existent accounts default to EMPTY_ACCOUNT, which has balance 0. |
| 86 | balance = get_account(evm.message.block_env.state, address).balance |
| 87 | |
| 88 | push(evm.stack, balance) |
| 89 | |
| 90 | # PROGRAM COUNTER |
| 91 | evm.pc += Uint(1) |
origin ¶
Pushes the address of the original transaction sender to the stack. The origin address can only be an EOA.
Parameters
evm : The current EVM frame.
def origin(evm: Evm) -> None:
| 95 | """ |
|---|---|
| 96 | Pushes the address of the original transaction sender to the stack. |
| 97 | The origin address can only be an EOA. |
| 98 | |
| 99 | Parameters |
| 100 | ---------- |
| 101 | evm : |
| 102 | The current EVM frame. |
| 103 | |
| 104 | """ |
| 105 | # STACK |
| 106 | pass |
| 107 | |
| 108 | # GAS |
| 109 | charge_gas(evm, GAS_BASE) |
| 110 | |
| 111 | # OPERATION |
| 112 | push(evm.stack, U256.from_be_bytes(evm.message.tx_env.origin)) |
| 113 | |
| 114 | # PROGRAM COUNTER |
| 115 | evm.pc += Uint(1) |
caller ¶
Pushes the address of the caller onto the stack.
Parameters
evm : The current EVM frame.
def caller(evm: Evm) -> None:
| 119 | """ |
|---|---|
| 120 | Pushes the address of the caller onto the stack. |
| 121 | |
| 122 | Parameters |
| 123 | ---------- |
| 124 | evm : |
| 125 | The current EVM frame. |
| 126 | |
| 127 | """ |
| 128 | # STACK |
| 129 | pass |
| 130 | |
| 131 | # GAS |
| 132 | charge_gas(evm, GAS_BASE) |
| 133 | |
| 134 | # OPERATION |
| 135 | push(evm.stack, U256.from_be_bytes(evm.message.caller)) |
| 136 | |
| 137 | # PROGRAM COUNTER |
| 138 | evm.pc += Uint(1) |
callvalue ¶
Push the value (in wei) sent with the call onto the stack.
Parameters
evm : The current EVM frame.
def callvalue(evm: Evm) -> None:
| 142 | """ |
|---|---|
| 143 | Push the value (in wei) sent with the call onto the stack. |
| 144 | |
| 145 | Parameters |
| 146 | ---------- |
| 147 | evm : |
| 148 | The current EVM frame. |
| 149 | |
| 150 | """ |
| 151 | # STACK |
| 152 | pass |
| 153 | |
| 154 | # GAS |
| 155 | charge_gas(evm, GAS_BASE) |
| 156 | |
| 157 | # OPERATION |
| 158 | push(evm.stack, evm.message.value) |
| 159 | |
| 160 | # PROGRAM COUNTER |
| 161 | evm.pc += Uint(1) |
calldataload ¶
Push a word (32 bytes) of the input data belonging to the current environment onto the stack.
Parameters
evm : The current EVM frame.
def calldataload(evm: Evm) -> None:
| 165 | """ |
|---|---|
| 166 | Push a word (32 bytes) of the input data belonging to the current |
| 167 | environment onto the stack. |
| 168 | |
| 169 | Parameters |
| 170 | ---------- |
| 171 | evm : |
| 172 | The current EVM frame. |
| 173 | |
| 174 | """ |
| 175 | # STACK |
| 176 | start_index = pop(evm.stack) |
| 177 | |
| 178 | # GAS |
| 179 | charge_gas(evm, GAS_VERY_LOW) |
| 180 | |
| 181 | # OPERATION |
| 182 | value = buffer_read(evm.message.data, start_index, U256(32)) |
| 183 | |
| 184 | push(evm.stack, U256.from_be_bytes(value)) |
| 185 | |
| 186 | # PROGRAM COUNTER |
| 187 | evm.pc += Uint(1) |
calldatasize ¶
Push the size of input data in current environment onto the stack.
Parameters
evm : The current EVM frame.
def calldatasize(evm: Evm) -> None:
| 191 | """ |
|---|---|
| 192 | Push the size of input data in current environment onto the stack. |
| 193 | |
| 194 | Parameters |
| 195 | ---------- |
| 196 | evm : |
| 197 | The current EVM frame. |
| 198 | |
| 199 | """ |
| 200 | # STACK |
| 201 | pass |
| 202 | |
| 203 | # GAS |
| 204 | charge_gas(evm, GAS_BASE) |
| 205 | |
| 206 | # OPERATION |
| 207 | push(evm.stack, U256(len(evm.message.data))) |
| 208 | |
| 209 | # PROGRAM COUNTER |
| 210 | evm.pc += Uint(1) |
calldatacopy ¶
Copy a portion of the input data in current environment to memory.
This will also expand the memory, in case that the memory is insufficient to store the data.
Parameters
evm : The current EVM frame.
def calldatacopy(evm: Evm) -> None:
| 214 | """ |
|---|---|
| 215 | Copy a portion of the input data in current environment to memory. |
| 216 | |
| 217 | This will also expand the memory, in case that the memory is insufficient |
| 218 | to store the data. |
| 219 | |
| 220 | Parameters |
| 221 | ---------- |
| 222 | evm : |
| 223 | The current EVM frame. |
| 224 | |
| 225 | """ |
| 226 | # STACK |
| 227 | memory_start_index = pop(evm.stack) |
| 228 | data_start_index = pop(evm.stack) |
| 229 | size = pop(evm.stack) |
| 230 | |
| 231 | # GAS |
| 232 | words = ceil32(Uint(size)) // Uint(32) |
| 233 | copy_gas_cost = GAS_COPY * words |
| 234 | extend_memory = calculate_gas_extend_memory( |
| 235 | evm.memory, [(memory_start_index, size)] |
| 236 | ) |
| 237 | charge_gas(evm, GAS_VERY_LOW + copy_gas_cost + extend_memory.cost) |
| 238 | |
| 239 | # OPERATION |
| 240 | evm.memory += b"\x00" * extend_memory.expand_by |
| 241 | value = buffer_read(evm.message.data, data_start_index, size) |
| 242 | memory_write(evm.memory, memory_start_index, value) |
| 243 | |
| 244 | # PROGRAM COUNTER |
| 245 | evm.pc += Uint(1) |
codesize ¶
Push the size of code running in current environment onto the stack.
Parameters
evm : The current EVM frame.
def codesize(evm: Evm) -> None:
| 249 | """ |
|---|---|
| 250 | Push the size of code running in current environment onto the stack. |
| 251 | |
| 252 | Parameters |
| 253 | ---------- |
| 254 | evm : |
| 255 | The current EVM frame. |
| 256 | |
| 257 | """ |
| 258 | # STACK |
| 259 | pass |
| 260 | |
| 261 | # GAS |
| 262 | charge_gas(evm, GAS_BASE) |
| 263 | |
| 264 | # OPERATION |
| 265 | push(evm.stack, U256(len(evm.code))) |
| 266 | |
| 267 | # PROGRAM COUNTER |
| 268 | evm.pc += Uint(1) |
codecopy ¶
Copy a portion of the code in current environment to memory.
This will also expand the memory, in case that the memory is insufficient to store the data.
Parameters
evm : The current EVM frame.
def codecopy(evm: Evm) -> None:
| 272 | """ |
|---|---|
| 273 | Copy a portion of the code in current environment to memory. |
| 274 | |
| 275 | This will also expand the memory, in case that the memory is insufficient |
| 276 | to store the data. |
| 277 | |
| 278 | Parameters |
| 279 | ---------- |
| 280 | evm : |
| 281 | The current EVM frame. |
| 282 | |
| 283 | """ |
| 284 | # STACK |
| 285 | memory_start_index = pop(evm.stack) |
| 286 | code_start_index = pop(evm.stack) |
| 287 | size = pop(evm.stack) |
| 288 | |
| 289 | # GAS |
| 290 | words = ceil32(Uint(size)) // Uint(32) |
| 291 | copy_gas_cost = GAS_COPY * words |
| 292 | extend_memory = calculate_gas_extend_memory( |
| 293 | evm.memory, [(memory_start_index, size)] |
| 294 | ) |
| 295 | charge_gas(evm, GAS_VERY_LOW + copy_gas_cost + extend_memory.cost) |
| 296 | |
| 297 | # OPERATION |
| 298 | evm.memory += b"\x00" * extend_memory.expand_by |
| 299 | value = buffer_read(evm.code, code_start_index, size) |
| 300 | memory_write(evm.memory, memory_start_index, value) |
| 301 | |
| 302 | # PROGRAM COUNTER |
| 303 | evm.pc += Uint(1) |
gasprice ¶
Push the gas price used in current environment onto the stack.
Parameters
evm : The current EVM frame.
def gasprice(evm: Evm) -> None:
| 307 | """ |
|---|---|
| 308 | Push the gas price used in current environment onto the stack. |
| 309 | |
| 310 | Parameters |
| 311 | ---------- |
| 312 | evm : |
| 313 | The current EVM frame. |
| 314 | |
| 315 | """ |
| 316 | # STACK |
| 317 | pass |
| 318 | |
| 319 | # GAS |
| 320 | charge_gas(evm, GAS_BASE) |
| 321 | |
| 322 | # OPERATION |
| 323 | push(evm.stack, U256(evm.message.tx_env.gas_price)) |
| 324 | |
| 325 | # PROGRAM COUNTER |
| 326 | evm.pc += Uint(1) |
extcodesize ¶
Push the code size of a given account onto the stack.
Parameters
evm : The current EVM frame.
def extcodesize(evm: Evm) -> None:
| 330 | """ |
|---|---|
| 331 | Push the code size of a given account onto the stack. |
| 332 | |
| 333 | Parameters |
| 334 | ---------- |
| 335 | evm : |
| 336 | The current EVM frame. |
| 337 | |
| 338 | """ |
| 339 | # STACK |
| 340 | address = to_address_masked(pop(evm.stack)) |
| 341 | |
| 342 | # GAS |
| 343 | if address in evm.accessed_addresses: |
| 344 | access_gas_cost = GAS_WARM_ACCESS |
| 345 | else: |
| 346 | evm.accessed_addresses.add(address) |
| 347 | access_gas_cost = GAS_COLD_ACCOUNT_ACCESS |
| 348 | |
| 349 | charge_gas(evm, access_gas_cost) |
| 350 | |
| 351 | # OPERATION |
| 352 | state = evm.message.block_env.state |
| 353 | code = get_code(state, get_account(state, address).code_hash) |
| 354 | |
| 355 | codesize = U256(len(code)) |
| 356 | push(evm.stack, codesize) |
| 357 | |
| 358 | # PROGRAM COUNTER |
| 359 | evm.pc += Uint(1) |
extcodecopy ¶
Copy a portion of an account's code to memory.
Parameters
evm : The current EVM frame.
def extcodecopy(evm: Evm) -> None:
| 363 | """ |
|---|---|
| 364 | Copy a portion of an account's code to memory. |
| 365 | |
| 366 | Parameters |
| 367 | ---------- |
| 368 | evm : |
| 369 | The current EVM frame. |
| 370 | |
| 371 | """ |
| 372 | # STACK |
| 373 | address = to_address_masked(pop(evm.stack)) |
| 374 | memory_start_index = pop(evm.stack) |
| 375 | code_start_index = pop(evm.stack) |
| 376 | size = pop(evm.stack) |
| 377 | |
| 378 | # GAS |
| 379 | words = ceil32(Uint(size)) // Uint(32) |
| 380 | copy_gas_cost = GAS_COPY * words |
| 381 | extend_memory = calculate_gas_extend_memory( |
| 382 | evm.memory, [(memory_start_index, size)] |
| 383 | ) |
| 384 | |
| 385 | if address in evm.accessed_addresses: |
| 386 | access_gas_cost = GAS_WARM_ACCESS |
| 387 | else: |
| 388 | evm.accessed_addresses.add(address) |
| 389 | access_gas_cost = GAS_COLD_ACCOUNT_ACCESS |
| 390 | |
| 391 | charge_gas(evm, access_gas_cost + copy_gas_cost + extend_memory.cost) |
| 392 | |
| 393 | # OPERATION |
| 394 | evm.memory += b"\x00" * extend_memory.expand_by |
| 395 | state = evm.message.block_env.state |
| 396 | code = get_code(state, get_account(state, address).code_hash) |
| 397 | |
| 398 | value = buffer_read(code, code_start_index, size) |
| 399 | memory_write(evm.memory, memory_start_index, value) |
| 400 | |
| 401 | # PROGRAM COUNTER |
| 402 | evm.pc += Uint(1) |
returndatasize ¶
Pushes the size of the return data buffer onto the stack.
Parameters
evm : The current EVM frame.
def returndatasize(evm: Evm) -> None:
| 406 | """ |
|---|---|
| 407 | Pushes the size of the return data buffer onto the stack. |
| 408 | |
| 409 | Parameters |
| 410 | ---------- |
| 411 | evm : |
| 412 | The current EVM frame. |
| 413 | |
| 414 | """ |
| 415 | # STACK |
| 416 | pass |
| 417 | |
| 418 | # GAS |
| 419 | charge_gas(evm, GAS_BASE) |
| 420 | |
| 421 | # OPERATION |
| 422 | push(evm.stack, U256(len(evm.return_data))) |
| 423 | |
| 424 | # PROGRAM COUNTER |
| 425 | evm.pc += Uint(1) |
returndatacopy ¶
Copies data from the return data buffer to memory.
Parameters
evm : The current EVM frame.
def returndatacopy(evm: Evm) -> None:
| 429 | """ |
|---|---|
| 430 | Copies data from the return data buffer to memory. |
| 431 | |
| 432 | Parameters |
| 433 | ---------- |
| 434 | evm : |
| 435 | The current EVM frame. |
| 436 | |
| 437 | """ |
| 438 | # STACK |
| 439 | memory_start_index = pop(evm.stack) |
| 440 | return_data_start_position = pop(evm.stack) |
| 441 | size = pop(evm.stack) |
| 442 | |
| 443 | # GAS |
| 444 | words = ceil32(Uint(size)) // Uint(32) |
| 445 | copy_gas_cost = GAS_RETURN_DATA_COPY * words |
| 446 | extend_memory = calculate_gas_extend_memory( |
| 447 | evm.memory, [(memory_start_index, size)] |
| 448 | ) |
| 449 | charge_gas(evm, GAS_VERY_LOW + copy_gas_cost + extend_memory.cost) |
| 450 | if Uint(return_data_start_position) + Uint(size) > ulen(evm.return_data): |
| 451 | raise OutOfBoundsRead |
| 452 | |
| 453 | evm.memory += b"\x00" * extend_memory.expand_by |
| 454 | value = evm.return_data[ |
| 455 | return_data_start_position : return_data_start_position + size |
| 456 | ] |
| 457 | memory_write(evm.memory, memory_start_index, value) |
| 458 | |
| 459 | # PROGRAM COUNTER |
| 460 | evm.pc += Uint(1) |
extcodehash ¶
Returns the keccak256 hash of a contract’s bytecode.
Parameters
evm : The current EVM frame.
def extcodehash(evm: Evm) -> None:
| 464 | """ |
|---|---|
| 465 | Returns the keccak256 hash of a contract’s bytecode. |
| 466 | |
| 467 | Parameters |
| 468 | ---------- |
| 469 | evm : |
| 470 | The current EVM frame. |
| 471 | |
| 472 | """ |
| 473 | # STACK |
| 474 | address = to_address_masked(pop(evm.stack)) |
| 475 | |
| 476 | # GAS |
| 477 | if address in evm.accessed_addresses: |
| 478 | access_gas_cost = GAS_WARM_ACCESS |
| 479 | else: |
| 480 | evm.accessed_addresses.add(address) |
| 481 | access_gas_cost = GAS_COLD_ACCOUNT_ACCESS |
| 482 | |
| 483 | charge_gas(evm, access_gas_cost) |
| 484 | |
| 485 | # OPERATION |
| 486 | account = get_account(evm.message.block_env.state, address) |
| 487 | |
| 488 | if account == EMPTY_ACCOUNT: |
| 489 | codehash = U256(0) |
| 490 | else: |
| 491 | codehash = U256.from_be_bytes(account.code_hash) |
| 492 | |
| 493 | push(evm.stack, codehash) |
| 494 | |
| 495 | # PROGRAM COUNTER |
| 496 | evm.pc += Uint(1) |
self_balance ¶
Pushes the balance of the current address to the stack.
Parameters
evm : The current EVM frame.
def self_balance(evm: Evm) -> None:
| 500 | """ |
|---|---|
| 501 | Pushes the balance of the current address to the stack. |
| 502 | |
| 503 | Parameters |
| 504 | ---------- |
| 505 | evm : |
| 506 | The current EVM frame. |
| 507 | |
| 508 | """ |
| 509 | # STACK |
| 510 | pass |
| 511 | |
| 512 | # GAS |
| 513 | charge_gas(evm, GAS_FAST_STEP) |
| 514 | |
| 515 | # OPERATION |
| 516 | # Non-existent accounts default to EMPTY_ACCOUNT, which has balance 0. |
| 517 | balance = get_account( |
| 518 | evm.message.block_env.state, evm.message.current_target |
| 519 | ).balance |
| 520 | |
| 521 | push(evm.stack, balance) |
| 522 | |
| 523 | # PROGRAM COUNTER |
| 524 | evm.pc += Uint(1) |
base_fee ¶
Pushes the base fee of the current block on to the stack.
Parameters
evm : The current EVM frame.
def base_fee(evm: Evm) -> None:
| 528 | """ |
|---|---|
| 529 | Pushes the base fee of the current block on to the stack. |
| 530 | |
| 531 | Parameters |
| 532 | ---------- |
| 533 | evm : |
| 534 | The current EVM frame. |
| 535 | |
| 536 | """ |
| 537 | # STACK |
| 538 | pass |
| 539 | |
| 540 | # GAS |
| 541 | charge_gas(evm, GAS_BASE) |
| 542 | |
| 543 | # OPERATION |
| 544 | push(evm.stack, U256(evm.message.block_env.base_fee_per_gas)) |
| 545 | |
| 546 | # PROGRAM COUNTER |
| 547 | evm.pc += Uint(1) |
blob_hash ¶
Pushes the versioned hash at a particular index on to the stack.
Parameters
evm : The current EVM frame.
def blob_hash(evm: Evm) -> None:
| 551 | """ |
|---|---|
| 552 | Pushes the versioned hash at a particular index on to the stack. |
| 553 | |
| 554 | Parameters |
| 555 | ---------- |
| 556 | evm : |
| 557 | The current EVM frame. |
| 558 | |
| 559 | """ |
| 560 | # STACK |
| 561 | index = pop(evm.stack) |
| 562 | |
| 563 | # GAS |
| 564 | charge_gas(evm, GAS_BLOBHASH_OPCODE) |
| 565 | |
| 566 | # OPERATION |
| 567 | if int(index) < len(evm.message.tx_env.blob_versioned_hashes): |
| 568 | blob_hash = evm.message.tx_env.blob_versioned_hashes[index] |
| 569 | else: |
| 570 | blob_hash = Bytes32(b"\x00" * 32) |
| 571 | push(evm.stack, U256.from_be_bytes(blob_hash)) |
| 572 | |
| 573 | # PROGRAM COUNTER |
| 574 | evm.pc += Uint(1) |
blob_base_fee ¶
Pushes the blob base fee on to the stack.
Parameters
evm : The current EVM frame.
def blob_base_fee(evm: Evm) -> None:
| 578 | """ |
|---|---|
| 579 | Pushes the blob base fee on to the stack. |
| 580 | |
| 581 | Parameters |
| 582 | ---------- |
| 583 | evm : |
| 584 | The current EVM frame. |
| 585 | |
| 586 | """ |
| 587 | # STACK |
| 588 | pass |
| 589 | |
| 590 | # GAS |
| 591 | charge_gas(evm, GAS_BASE) |
| 592 | |
| 593 | # OPERATION |
| 594 | blob_base_fee = calculate_blob_gas_price( |
| 595 | evm.message.block_env.excess_blob_gas |
| 596 | ) |
| 597 | push(evm.stack, U256(blob_base_fee)) |
| 598 | |
| 599 | # PROGRAM COUNTER |
| 600 | evm.pc += Uint(1) |