March 2018
Beginner to intermediate
656 pages
20h 9m
English
Content preview from Mastering Blockchain - Second Edition
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System operations
System operations are used to perform various system-related operations, such as account creation, message calling, and execution control. There are nine opcodes available in total in this category.
|
Mnemonic |
Value |
POP |
PUSH |
Gas |
Description |
|
CREATE |
0xf0 |
3 |
1 |
32,000 |
Used to create a new account with the associated code. |
|
CALL |
0xf1 |
7 |
1 |
40 |
Used to initiate a message call into a contract account. |
|
CALLCODE |
0xf2 |
7 |
1 |
40 |
Used to initiate a message call into this account with an alternative account's code. |
|
RETURN |
0xf3 |
2 |
0 |
0 |
Stops the execution and returns output data. |
|
DELEGATECALL |
0xf4 |
6 |
1 |
40 |
This is same as CALLCODE but does not change the current values ... |