EVM golf #9:
Warning: Hardcore level!
Smallest bytecode fully compliant ERC20 implementation.
Deployed contract on Rinkeby: 0x8b38be1ff7c640079acc30833148055086631a1e
| bytecode | deployed bytecode |
|---|---|
| 273 bytes | 187 bytes |
Deployed bytecode:
0x60206001588060063d3560f51c600b160602601601565b602e565b6033565b603a565b6065565b6087565b60a4565b3860b1565b80355460b1565b6024358135336044565b82815481811060b75703815581805484019055913d52908354853da38160b1565b604435602435823533813d525952593d20805480851160b75784900390556044565b80356024358082333d525952593d20553d52333d54853da38160b1565b6040813d37593d205460b1565b3d52823df35b3d3dfd
Encrypted version to be tweeted (subtweet zone, push1 values are not encoded for better readability):
P20CP04!P06ZLPf5}P0b&/*P16+JDP2eJDP33JDP3aJDP65JDP87JDPa4JD_Pb1JD@LsPb1JDP24L@LEP44JD#@s@@<Pb7j-@S@!s%+WSwZMW$s^Zl@Pb1JDP44LP24L#LE@ZMmMmZK!s!^>Pb7j%W-WSP44JD!LP24L!#EZMmMmZKSZMEZs^Zl@Pb1JDP40@ZOmZKsPb1JDZM#ZRDZZr
Encryption Legend
push1 P 📌
swap1 W 💱
swap2 w 🔁
dupX shift + X
dup1 ! 🕐
dup2 @ 🕑
dup3 # 🕒
dup4 $ 🕓
dup5 % 🕔
dup6 ^ 🕕
pc C ⏱
returndatasize Z 0️⃣
codesize _ ⚖
jump J 🦘
jumpi j ❓
jumpdest D 🎯
mstore M 🏪
msize m 📏
sstore S 🏬
sload s 🔎
calldataload L 📥
calldatacopy O 📠
caller E 📞
log3 l 📘
return R 🆗
revert r 🔥
add + ➕
sub - ➖
mul * ✖
mod / 🧨
and & ⚡
shr } ➡
sha3 K 🔐
lt < ◀
gt > ▶
Encrypted emoji version:
📌20📌01⏱🕐📌060️⃣📥📌f5➡📌0b⚡🧨✖📌16➕🦘🎯📌2e🦘🎯📌33🦘🎯📌3a🦘🎯📌65🦘🎯📌87🦘🎯📌a4🦘🎯⚖📌b1🦘🎯🕐📥🔎📌b1🦘🎯📌24📥🕑📥📞📌44🦘🎯🕒🕑🔎🕑🕑◀📌b7❓➖🕑🏬🕑🕐🔎🕔➕💱🏬🔁0️⃣🏪💱🕓🔎🕕0️⃣📘🕑📌b1🦘🎯📌44📥📌24📥🕒📥📞🕑0️⃣🏪📏🏪📏0️⃣🔐🕐🔎🕐🕕▶📌b7❓🕔💱➖💱🏬📌44🦘🎯🕐📥📌24📥🕐🕒📞0️⃣🏪📏🏪📏0️⃣🔐🏬0️⃣🏪📞0️⃣🔎🕕0️⃣📘🕑📌b1🦘🎯📌40🕑0️⃣📠📏0️⃣🔐🔎📌b1🦘🎯0️⃣🏪🕒0️⃣🆗🎯0️⃣0️⃣🔥
Unfortunately, Twitter counts emojis as 2 characters. It would have been nice to post the emoji version on Twitter if emojis were counted as 1.
- event topics are stored in storage for bytecode optimization, but it will add to runtime gas cost
- special storage allocation for mappings
- refactor
allowance_slotmacro - hoist up some of the repeated constants up and use
dupNopcodes, might not be good for gas.
-
etkdoesn't allow comment only lines in macros