# ERC721 precompile
Using address at 'nft', it works well. Find more [here](https://github.com/cennznet/wiki/blob/spike/precompileERC721/EVM/ERC721-precompile.md)
Test contract to use ERC721 precompile on CENNZnet chain.
```
pragma solidity ^0.8.13;
import "@openzeppelin/contracts/interfaces/IERC721.sol";
import "@openzeppelin/contracts/interfaces/IERC165.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
contract Test {
address nft = 0xaAAAaaAA00000000000000000000000000000000;
function balanceOfProxy(address who) public view returns (uint256) {
return IERC721(nft).balanceOf(who);
}
function ownerOfProxy(uint256 tokenId) public view returns (address) {
return IERC721(nft).ownerOf(tokenId);
}
function nameOfNFT() public view returns (string memory) {
return IERC721Metadata(nft).name();
}
function symbolOfNFT() public view returns (string memory) {
return IERC721Metadata(nft).symbol();
}
function tokenURIOfNFT(uint256 serial_number) public view returns (string memory) {
return IERC721Metadata(nft).tokenURI(serial_number);
}
function transferFromProxy(
uint256 serial_number
) external {
IERC721(nft).transferFrom(0x89A1421e1482FA467F6E2FBC4decBaE8a4A6A065, msg.sender, serial_number);
}
function approveFromProxy(
uint256 serial_number
) external {
IERC721(nft).approve(address(this), serial_number);
}
}
```
Calling within a smart contract transaction, fails with error
***VM Exception while processing transaction: revert***
Investigation till now
Revert is due to invalid opcode while executing the transaction.
https://medium.com/@cpluser/how-evm-opcodes-run-in-sputnikvm-rust-part-1-6dbe74fd0190 provides more information on how opcodes run in rust
The compiled EVM byte code for NFT contract looks like
```
solc --bin --asm test-ts/contracts/NFT.sol
======= test-ts/contracts/NFT.sol:IERC721 =======
EVM assembly:
Binary:
======= test-ts/contracts/NFT.sol:NFT =======
EVM assembly:
/* "test-ts/contracts/NFT.sol":335:852 contract NFT {... */
mstore(0x40, 0x80)
/* "test-ts/contracts/NFT.sol":491:533 0xaAAAaaAA00000000000000000000000000000000 */
0xaaaaaaaa00000000000000000000000000000000
/* "test-ts/contracts/NFT.sol":477:533 address nft = 0xaAAAaaAA00000000000000000000000000000000 */
0x00
dup1
0x0100
exp
dup2
sload
dup2
0xffffffffffffffffffffffffffffffffffffffff
mul
not
and
swap1
dup4
0xffffffffffffffffffffffffffffffffffffffff
and
mul
or
swap1
sstore
pop
/* "test-ts/contracts/NFT.sol":335:852 contract NFT {... */
callvalue
dup1
iszero
tag_1
jumpi
0x00
dup1
revert
tag_1:
pop
dataSize(sub_0)
dup1
dataOffset(sub_0)
0x00
codecopy
0x00
return
stop
sub_0: assembly {
/* "test-ts/contracts/NFT.sol":335:852 contract NFT {... */
mstore(0x40, 0x80)
callvalue
dup1
iszero
tag_1
jumpi
0x00
dup1
revert
tag_1:
pop
jumpi(tag_2, lt(calldatasize, 0x04))
shr(0xe0, calldataload(0x00))
dup1
0x2b2cf0df
eq
tag_3
jumpi
dup1
0x382904fa
eq
tag_4
jumpi
tag_2:
0x00
dup1
revert
/* "test-ts/contracts/NFT.sol":711:850 function approveFromProxy(address to,... */
tag_3:
tag_5
0x04
dup1
calldatasize
sub
dup2
add
swap1
tag_6
swap2
swap1
tag_7
jump // in
tag_6:
tag_8
jump // in
tag_5:
stop
/* "test-ts/contracts/NFT.sol":540:705 function transferFromProxy(address to, address from,... */
tag_4:
tag_9
0x04
dup1
calldatasize
sub
dup2
add
swap1
tag_10
swap2
swap1
tag_11
jump // in
tag_10:
tag_12
jump // in
tag_9:
stop
/* "test-ts/contracts/NFT.sol":711:850 function approveFromProxy(address to,... */
tag_8:
/* "test-ts/contracts/NFT.sol":812:815 nft */
0x00
dup1
sload
swap1
0x0100
exp
swap1
div
0xffffffffffffffffffffffffffffffffffffffff
and
/* "test-ts/contracts/NFT.sol":804:824 IERC721(nft).approve */
0xffffffffffffffffffffffffffffffffffffffff
and
0x095ea7b3
/* "test-ts/contracts/NFT.sol":825:827 to */
dup4
/* "test-ts/contracts/NFT.sol":829:842 serial_number */
dup4
/* "test-ts/contracts/NFT.sol":804:843 IERC721(nft).approve(to, serial_number) */
mload(0x40)
dup4
0xffffffff
and
0xe0
shl
dup2
mstore
0x04
add
tag_14
swap3
swap2
swap1
tag_15
jump // in
tag_14:
0x00
mload(0x40)
dup1
dup4
sub
dup2
0x00
dup8
dup1
extcodesize
iszero
dup1
iszero
tag_16
jumpi
0x00
dup1
revert
tag_16:
pop
gas
call
iszero
dup1
iszero
tag_18
jumpi
returndatasize
0x00
dup1
returndatacopy
revert(0x00, returndatasize)
tag_18:
pop
pop
pop
pop
/* "test-ts/contracts/NFT.sol":711:850 function approveFromProxy(address to,... */
pop
pop
jump // out
/* "test-ts/contracts/NFT.sol":540:705 function transferFromProxy(address to, address from,... */
tag_12:
/* "test-ts/contracts/NFT.sol":656:659 nft */
0x00
dup1
sload
swap1
0x0100
exp
swap1
div
0xffffffffffffffffffffffffffffffffffffffff
and
/* "test-ts/contracts/NFT.sol":648:673 IERC721(nft).transferFrom */
0xffffffffffffffffffffffffffffffffffffffff
and
0x23b872dd
/* "test-ts/contracts/NFT.sol":674:676 to */
dup5
/* "test-ts/contracts/NFT.sol":678:682 from */
dup5
/* "test-ts/contracts/NFT.sol":684:697 serial_number */
dup5
/* "test-ts/contracts/NFT.sol":648:698 IERC721(nft).transferFrom(to, from, serial_number) */
mload(0x40)
dup5
0xffffffff
and
0xe0
shl
dup2
mstore
0x04
add
tag_20
swap4
swap3
swap2
swap1
tag_21
jump // in
tag_20:
0x00
mload(0x40)
dup1
dup4
sub
dup2
0x00
dup8
dup1
extcodesize
iszero
dup1
iszero
tag_22
jumpi
0x00
dup1
revert
tag_22:
pop
gas
call
iszero
dup1
iszero
tag_24
jumpi
returndatasize
0x00
dup1
returndatacopy
revert(0x00, returndatasize)
tag_24:
pop
pop
pop
pop
/* "test-ts/contracts/NFT.sol":540:705 function transferFromProxy(address to, address from,... */
pop
pop
pop
jump // out
/* "#utility.yul":88:205 */
tag_26:
/* "#utility.yul":197:198 */
0x00
/* "#utility.yul":194:195 */
dup1
/* "#utility.yul":187:199 */
revert
/* "#utility.yul":334:460 */
tag_28:
/* "#utility.yul":371:378 */
0x00
/* "#utility.yul":411:453 */
0xffffffffffffffffffffffffffffffffffffffff
/* "#utility.yul":404:409 */
dup3
/* "#utility.yul":400:454 */
and
/* "#utility.yul":389:454 */
swap1
pop
/* "#utility.yul":334:460 */
swap2
swap1
pop
jump // out
/* "#utility.yul":466:562 */
tag_29:
/* "#utility.yul":503:510 */
0x00
/* "#utility.yul":532:556 */
tag_43
/* "#utility.yul":550:555 */
dup3
/* "#utility.yul":532:556 */
tag_28
jump // in
tag_43:
/* "#utility.yul":521:556 */
swap1
pop
/* "#utility.yul":466:562 */
swap2
swap1
pop
jump // out
/* "#utility.yul":568:690 */
tag_30:
/* "#utility.yul":641:665 */
tag_45
/* "#utility.yul":659:664 */
dup2
/* "#utility.yul":641:665 */
tag_29
jump // in
tag_45:
/* "#utility.yul":634:639 */
dup2
/* "#utility.yul":631:666 */
eq
/* "#utility.yul":621:684 */
tag_46
jumpi
/* "#utility.yul":680:681 */
0x00
/* "#utility.yul":677:678 */
dup1
/* "#utility.yul":670:682 */
revert
/* "#utility.yul":621:684 */
tag_46:
/* "#utility.yul":568:690 */
pop
jump // out
/* "#utility.yul":696:835 */
tag_31:
/* "#utility.yul":742:747 */
0x00
/* "#utility.yul":780:786 */
dup2
/* "#utility.yul":767:787 */
calldataload
/* "#utility.yul":758:787 */
swap1
pop
/* "#utility.yul":796:829 */
tag_48
/* "#utility.yul":823:828 */
dup2
/* "#utility.yul":796:829 */
tag_30
jump // in
tag_48:
/* "#utility.yul":696:835 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":841:918 */
tag_32:
/* "#utility.yul":878:885 */
0x00
/* "#utility.yul":907:912 */
dup2
/* "#utility.yul":896:912 */
swap1
pop
/* "#utility.yul":841:918 */
swap2
swap1
pop
jump // out
/* "#utility.yul":924:1046 */
tag_33:
/* "#utility.yul":997:1021 */
tag_51
/* "#utility.yul":1015:1020 */
dup2
/* "#utility.yul":997:1021 */
tag_32
jump // in
tag_51:
/* "#utility.yul":990:995 */
dup2
/* "#utility.yul":987:1022 */
eq
/* "#utility.yul":977:1040 */
tag_52
jumpi
/* "#utility.yul":1036:1037 */
0x00
/* "#utility.yul":1033:1034 */
dup1
/* "#utility.yul":1026:1038 */
revert
/* "#utility.yul":977:1040 */
tag_52:
/* "#utility.yul":924:1046 */
pop
jump // out
/* "#utility.yul":1052:1191 */
tag_34:
/* "#utility.yul":1098:1103 */
0x00
/* "#utility.yul":1136:1142 */
dup2
/* "#utility.yul":1123:1143 */
calldataload
/* "#utility.yul":1114:1143 */
swap1
pop
/* "#utility.yul":1152:1185 */
tag_54
/* "#utility.yul":1179:1184 */
dup2
/* "#utility.yul":1152:1185 */
tag_33
jump // in
tag_54:
/* "#utility.yul":1052:1191 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":1197:1671 */
tag_7:
/* "#utility.yul":1265:1271 */
0x00
/* "#utility.yul":1273:1279 */
dup1
/* "#utility.yul":1322:1324 */
0x40
/* "#utility.yul":1310:1319 */
dup4
/* "#utility.yul":1301:1308 */
dup6
/* "#utility.yul":1297:1320 */
sub
/* "#utility.yul":1293:1325 */
slt
/* "#utility.yul":1290:1409 */
iszero
tag_56
jumpi
/* "#utility.yul":1328:1407 */
tag_57
tag_26
jump // in
tag_57:
/* "#utility.yul":1290:1409 */
tag_56:
/* "#utility.yul":1448:1449 */
0x00
/* "#utility.yul":1473:1526 */
tag_58
/* "#utility.yul":1518:1525 */
dup6
/* "#utility.yul":1509:1515 */
dup3
/* "#utility.yul":1498:1507 */
dup7
/* "#utility.yul":1494:1516 */
add
/* "#utility.yul":1473:1526 */
tag_31
jump // in
tag_58:
/* "#utility.yul":1463:1526 */
swap3
pop
/* "#utility.yul":1419:1536 */
pop
/* "#utility.yul":1575:1577 */
0x20
/* "#utility.yul":1601:1654 */
tag_59
/* "#utility.yul":1646:1653 */
dup6
/* "#utility.yul":1637:1643 */
dup3
/* "#utility.yul":1626:1635 */
dup7
/* "#utility.yul":1622:1644 */
add
/* "#utility.yul":1601:1654 */
tag_34
jump // in
tag_59:
/* "#utility.yul":1591:1654 */
swap2
pop
/* "#utility.yul":1546:1664 */
pop
/* "#utility.yul":1197:1671 */
swap3
pop
swap3
swap1
pop
jump // out
/* "#utility.yul":1677:2296 */
tag_11:
/* "#utility.yul":1754:1760 */
0x00
/* "#utility.yul":1762:1768 */
dup1
/* "#utility.yul":1770:1776 */
0x00
/* "#utility.yul":1819:1821 */
0x60
/* "#utility.yul":1807:1816 */
dup5
/* "#utility.yul":1798:1805 */
dup7
/* "#utility.yul":1794:1817 */
sub
/* "#utility.yul":1790:1822 */
slt
/* "#utility.yul":1787:1906 */
iszero
tag_61
jumpi
/* "#utility.yul":1825:1904 */
tag_62
tag_26
jump // in
tag_62:
/* "#utility.yul":1787:1906 */
tag_61:
/* "#utility.yul":1945:1946 */
0x00
/* "#utility.yul":1970:2023 */
tag_63
/* "#utility.yul":2015:2022 */
dup7
/* "#utility.yul":2006:2012 */
dup3
/* "#utility.yul":1995:2004 */
dup8
/* "#utility.yul":1991:2013 */
add
/* "#utility.yul":1970:2023 */
tag_31
jump // in
tag_63:
/* "#utility.yul":1960:2023 */
swap4
pop
/* "#utility.yul":1916:2033 */
pop
/* "#utility.yul":2072:2074 */
0x20
/* "#utility.yul":2098:2151 */
tag_64
/* "#utility.yul":2143:2150 */
dup7
/* "#utility.yul":2134:2140 */
dup3
/* "#utility.yul":2123:2132 */
dup8
/* "#utility.yul":2119:2141 */
add
/* "#utility.yul":2098:2151 */
tag_31
jump // in
tag_64:
/* "#utility.yul":2088:2151 */
swap3
pop
/* "#utility.yul":2043:2161 */
pop
/* "#utility.yul":2200:2202 */
0x40
/* "#utility.yul":2226:2279 */
tag_65
/* "#utility.yul":2271:2278 */
dup7
/* "#utility.yul":2262:2268 */
dup3
/* "#utility.yul":2251:2260 */
dup8
/* "#utility.yul":2247:2269 */
add
/* "#utility.yul":2226:2279 */
tag_34
jump // in
tag_65:
/* "#utility.yul":2216:2279 */
swap2
pop
/* "#utility.yul":2171:2289 */
pop
/* "#utility.yul":1677:2296 */
swap3
pop
swap3
pop
swap3
jump // out
/* "#utility.yul":2302:2420 */
tag_35:
/* "#utility.yul":2389:2413 */
tag_67
/* "#utility.yul":2407:2412 */
dup2
/* "#utility.yul":2389:2413 */
tag_29
jump // in
tag_67:
/* "#utility.yul":2384:2387 */
dup3
/* "#utility.yul":2377:2414 */
mstore
/* "#utility.yul":2302:2420 */
pop
pop
jump // out
/* "#utility.yul":2426:2544 */
tag_36:
/* "#utility.yul":2513:2537 */
tag_69
/* "#utility.yul":2531:2536 */
dup2
/* "#utility.yul":2513:2537 */
tag_32
jump // in
tag_69:
/* "#utility.yul":2508:2511 */
dup3
/* "#utility.yul":2501:2538 */
mstore
/* "#utility.yul":2426:2544 */
pop
pop
jump // out
/* "#utility.yul":2550:2882 */
tag_15:
/* "#utility.yul":2671:2675 */
0x00
/* "#utility.yul":2709:2711 */
0x40
/* "#utility.yul":2698:2707 */
dup3
/* "#utility.yul":2694:2712 */
add
/* "#utility.yul":2686:2712 */
swap1
pop
/* "#utility.yul":2722:2793 */
tag_71
/* "#utility.yul":2790:2791 */
0x00
/* "#utility.yul":2779:2788 */
dup4
/* "#utility.yul":2775:2792 */
add
/* "#utility.yul":2766:2772 */
dup6
/* "#utility.yul":2722:2793 */
tag_35
jump // in
tag_71:
/* "#utility.yul":2803:2875 */
tag_72
/* "#utility.yul":2871:2873 */
0x20
/* "#utility.yul":2860:2869 */
dup4
/* "#utility.yul":2856:2874 */
add
/* "#utility.yul":2847:2853 */
dup5
/* "#utility.yul":2803:2875 */
tag_36
jump // in
tag_72:
/* "#utility.yul":2550:2882 */
swap4
swap3
pop
pop
pop
jump // out
/* "#utility.yul":2888:3330 */
tag_21:
/* "#utility.yul":3037:3041 */
0x00
/* "#utility.yul":3075:3077 */
0x60
/* "#utility.yul":3064:3073 */
dup3
/* "#utility.yul":3060:3078 */
add
/* "#utility.yul":3052:3078 */
swap1
pop
/* "#utility.yul":3088:3159 */
tag_74
/* "#utility.yul":3156:3157 */
0x00
/* "#utility.yul":3145:3154 */
dup4
/* "#utility.yul":3141:3158 */
add
/* "#utility.yul":3132:3138 */
dup7
/* "#utility.yul":3088:3159 */
tag_35
jump // in
tag_74:
/* "#utility.yul":3169:3241 */
tag_75
/* "#utility.yul":3237:3239 */
0x20
/* "#utility.yul":3226:3235 */
dup4
/* "#utility.yul":3222:3240 */
add
/* "#utility.yul":3213:3219 */
dup6
/* "#utility.yul":3169:3241 */
tag_35
jump // in
tag_75:
/* "#utility.yul":3251:3323 */
tag_76
/* "#utility.yul":3319:3321 */
0x40
/* "#utility.yul":3308:3317 */
dup4
/* "#utility.yul":3304:3322 */
add
/* "#utility.yul":3295:3301 */
dup5
/* "#utility.yul":3251:3323 */
tag_36
jump // in
tag_76:
/* "#utility.yul":2888:3330 */
swap5
swap4
pop
pop
pop
pop
jump // out
auxdata: 0xa2646970667358221220b35361bce10e8d50efb46995825ff7c586989d5f73c6eb8776f6d2154c6ba39764736f6c63430008100033
}
Binary:
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
```
And for erc20 contract
```
pragma solidity ^0.8.13;
import "@openzeppelin/contracts/interfaces/IERC20.sol";
// import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
// import "@openzeppelin/contracts/interfaces/IERC165.sol";
contract abc {
// CENNZ testnet address with assetId 16000
address cennz = 0xcCccccCc00003E80000000000000000000000000;
function balanceOfProxy(address who) public view returns (uint256) {
return IERC20(cennz).balanceOf(who);
}
function transferFromProxy(uint256 amount) external {
IERC20(cennz).transferFrom(msg.sender, address(this), amount);
}
}
```
Bytecode is
```
======= test-ts/contracts/ERC20.sol:abc =======
EVM assembly:
/* "test-ts/contracts/ERC20.sol":233:622 contract abc {... */
mstore(0x40, 0x80)
/* "test-ts/contracts/ERC20.sol":316:358 0xcCccccCc00003E80000000000000000000000000 */
0xcccccccc00003e80000000000000000000000000
/* "test-ts/contracts/ERC20.sol":300:358 address cennz = 0xcCccccCc00003E80000000000000000000000000 */
0x00
dup1
0x0100
exp
dup2
sload
dup2
0xffffffffffffffffffffffffffffffffffffffff
mul
not
and
swap1
dup4
0xffffffffffffffffffffffffffffffffffffffff
and
mul
or
swap1
sstore
pop
/* "test-ts/contracts/ERC20.sol":233:622 contract abc {... */
callvalue
dup1
iszero
tag_1
jumpi
0x00
dup1
revert
tag_1:
pop
dataSize(sub_0)
dup1
dataOffset(sub_0)
0x00
codecopy
0x00
return
stop
sub_0: assembly {
/* "test-ts/contracts/ERC20.sol":233:622 contract abc {... */
mstore(0x40, 0x80)
callvalue
dup1
iszero
tag_1
jumpi
0x00
dup1
revert
tag_1:
pop
jumpi(tag_2, lt(calldatasize, 0x04))
shr(0xe0, calldataload(0x00))
dup1
0x671ef26c
eq
tag_3
jumpi
dup1
0x95c5fc03
eq
tag_4
jumpi
tag_2:
0x00
dup1
revert
/* "test-ts/contracts/ERC20.sol":490:620 function transferFromProxy(uint256 amount) external {... */
tag_3:
tag_5
0x04
dup1
calldatasize
sub
dup2
add
swap1
tag_6
swap2
swap1
tag_7
jump // in
tag_6:
tag_8
jump // in
tag_5:
stop
/* "test-ts/contracts/ERC20.sol":365:484 function balanceOfProxy(address who) public view returns (uint256) {... */
tag_4:
tag_9
0x04
dup1
calldatasize
sub
dup2
add
swap1
tag_10
swap2
swap1
tag_11
jump // in
tag_10:
tag_12
jump // in
tag_9:
mload(0x40)
tag_13
swap2
swap1
tag_14
jump // in
tag_13:
mload(0x40)
dup1
swap2
sub
swap1
return
/* "test-ts/contracts/ERC20.sol":490:620 function transferFromProxy(uint256 amount) external {... */
tag_8:
/* "test-ts/contracts/ERC20.sol":559:564 cennz */
0x00
dup1
sload
swap1
0x0100
exp
swap1
div
0xffffffffffffffffffffffffffffffffffffffff
and
/* "test-ts/contracts/ERC20.sol":552:578 IERC20(cennz).transferFrom */
0xffffffffffffffffffffffffffffffffffffffff
and
0x23b872dd
/* "test-ts/contracts/ERC20.sol":579:589 msg.sender */
caller
/* "test-ts/contracts/ERC20.sol":599:603 this */
address
/* "test-ts/contracts/ERC20.sol":606:612 amount */
dup5
/* "test-ts/contracts/ERC20.sol":552:613 IERC20(cennz).transferFrom(msg.sender, address(this), amount) */
mload(0x40)
dup5
0xffffffff
and
0xe0
shl
dup2
mstore
0x04
add
tag_16
swap4
swap3
swap2
swap1
tag_17
jump // in
tag_16:
0x00
mload(0x40)
dup1
dup4
sub
dup2
0x00
dup8
dup1
extcodesize
iszero
dup1
iszero
tag_18
jumpi
0x00
dup1
revert
tag_18:
pop
gas
call
iszero
dup1
iszero
tag_20
jumpi
returndatasize
0x00
dup1
returndatacopy
revert(0x00, returndatasize)
tag_20:
pop
pop
pop
pop
/* "test-ts/contracts/ERC20.sol":490:620 function transferFromProxy(uint256 amount) external {... */
pop
jump // out
/* "test-ts/contracts/ERC20.sol":365:484 function balanceOfProxy(address who) public view returns (uint256) {... */
tag_12:
/* "test-ts/contracts/ERC20.sol":423:430 uint256 */
0x00
/* "test-ts/contracts/ERC20.sol":456:461 cennz */
dup1
0x00
swap1
sload
swap1
0x0100
exp
swap1
div
0xffffffffffffffffffffffffffffffffffffffff
and
/* "test-ts/contracts/ERC20.sol":449:472 IERC20(cennz).balanceOf */
0xffffffffffffffffffffffffffffffffffffffff
and
0x70a08231
/* "test-ts/contracts/ERC20.sol":473:476 who */
dup4
/* "test-ts/contracts/ERC20.sol":449:477 IERC20(cennz).balanceOf(who) */
mload(0x40)
dup3
0xffffffff
and
0xe0
shl
dup2
mstore
0x04
add
tag_22
swap2
swap1
tag_23
jump // in
tag_22:
0x20
mload(0x40)
dup1
dup4
sub
dup2
dup7
gas
staticcall
iszero
dup1
iszero
tag_25
jumpi
returndatasize
0x00
dup1
returndatacopy
revert(0x00, returndatasize)
tag_25:
pop
pop
pop
pop
mload(0x40)
returndatasize
not(0x1f)
0x1f
dup3
add
and
dup3
add
dup1
0x40
mstore
pop
dup2
add
swap1
tag_26
swap2
swap1
tag_27
jump // in
tag_26:
/* "test-ts/contracts/ERC20.sol":442:477 return IERC20(cennz).balanceOf(who) */
swap1
pop
/* "test-ts/contracts/ERC20.sol":365:484 function balanceOfProxy(address who) public view returns (uint256) {... */
swap2
swap1
pop
jump // out
/* "#utility.yul":88:205 */
tag_29:
/* "#utility.yul":197:198 */
0x00
/* "#utility.yul":194:195 */
dup1
/* "#utility.yul":187:199 */
revert
/* "#utility.yul":334:411 */
tag_31:
/* "#utility.yul":371:378 */
0x00
/* "#utility.yul":400:405 */
dup2
/* "#utility.yul":389:405 */
swap1
pop
/* "#utility.yul":334:411 */
swap2
swap1
pop
jump // out
/* "#utility.yul":417:539 */
tag_32:
/* "#utility.yul":490:514 */
tag_47
/* "#utility.yul":508:513 */
dup2
/* "#utility.yul":490:514 */
tag_31
jump // in
tag_47:
/* "#utility.yul":483:488 */
dup2
/* "#utility.yul":480:515 */
eq
/* "#utility.yul":470:533 */
tag_48
jumpi
/* "#utility.yul":529:530 */
0x00
/* "#utility.yul":526:527 */
dup1
/* "#utility.yul":519:531 */
revert
/* "#utility.yul":470:533 */
tag_48:
/* "#utility.yul":417:539 */
pop
jump // out
/* "#utility.yul":545:684 */
tag_33:
/* "#utility.yul":591:596 */
0x00
/* "#utility.yul":629:635 */
dup2
/* "#utility.yul":616:636 */
calldataload
/* "#utility.yul":607:636 */
swap1
pop
/* "#utility.yul":645:678 */
tag_50
/* "#utility.yul":672:677 */
dup2
/* "#utility.yul":645:678 */
tag_32
jump // in
tag_50:
/* "#utility.yul":545:684 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":690:1019 */
tag_7:
/* "#utility.yul":749:755 */
0x00
/* "#utility.yul":798:800 */
0x20
/* "#utility.yul":786:795 */
dup3
/* "#utility.yul":777:784 */
dup5
/* "#utility.yul":773:796 */
sub
/* "#utility.yul":769:801 */
slt
/* "#utility.yul":766:885 */
iszero
tag_52
jumpi
/* "#utility.yul":804:883 */
tag_53
tag_29
jump // in
tag_53:
/* "#utility.yul":766:885 */
tag_52:
/* "#utility.yul":924:925 */
0x00
/* "#utility.yul":949:1002 */
tag_54
/* "#utility.yul":994:1001 */
dup5
/* "#utility.yul":985:991 */
dup3
/* "#utility.yul":974:983 */
dup6
/* "#utility.yul":970:992 */
add
/* "#utility.yul":949:1002 */
tag_33
jump // in
tag_54:
/* "#utility.yul":939:1002 */
swap2
pop
/* "#utility.yul":895:1012 */
pop
/* "#utility.yul":690:1019 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":1025:1151 */
tag_34:
/* "#utility.yul":1062:1069 */
0x00
/* "#utility.yul":1102:1144 */
0xffffffffffffffffffffffffffffffffffffffff
/* "#utility.yul":1095:1100 */
dup3
/* "#utility.yul":1091:1145 */
and
/* "#utility.yul":1080:1145 */
swap1
pop
/* "#utility.yul":1025:1151 */
swap2
swap1
pop
jump // out
/* "#utility.yul":1157:1253 */
tag_35:
/* "#utility.yul":1194:1201 */
0x00
/* "#utility.yul":1223:1247 */
tag_57
/* "#utility.yul":1241:1246 */
dup3
/* "#utility.yul":1223:1247 */
tag_34
jump // in
tag_57:
/* "#utility.yul":1212:1247 */
swap1
pop
/* "#utility.yul":1157:1253 */
swap2
swap1
pop
jump // out
/* "#utility.yul":1259:1381 */
tag_36:
/* "#utility.yul":1332:1356 */
tag_59
/* "#utility.yul":1350:1355 */
dup2
/* "#utility.yul":1332:1356 */
tag_35
jump // in
tag_59:
/* "#utility.yul":1325:1330 */
dup2
/* "#utility.yul":1322:1357 */
eq
/* "#utility.yul":1312:1375 */
tag_60
jumpi
/* "#utility.yul":1371:1372 */
0x00
/* "#utility.yul":1368:1369 */
dup1
/* "#utility.yul":1361:1373 */
revert
/* "#utility.yul":1312:1375 */
tag_60:
/* "#utility.yul":1259:1381 */
pop
jump // out
/* "#utility.yul":1387:1526 */
tag_37:
/* "#utility.yul":1433:1438 */
0x00
/* "#utility.yul":1471:1477 */
dup2
/* "#utility.yul":1458:1478 */
calldataload
/* "#utility.yul":1449:1478 */
swap1
pop
/* "#utility.yul":1487:1520 */
tag_62
/* "#utility.yul":1514:1519 */
dup2
/* "#utility.yul":1487:1520 */
tag_36
jump // in
tag_62:
/* "#utility.yul":1387:1526 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":1532:1861 */
tag_11:
/* "#utility.yul":1591:1597 */
0x00
/* "#utility.yul":1640:1642 */
0x20
/* "#utility.yul":1628:1637 */
dup3
/* "#utility.yul":1619:1626 */
dup5
/* "#utility.yul":1615:1638 */
sub
/* "#utility.yul":1611:1643 */
slt
/* "#utility.yul":1608:1727 */
iszero
tag_64
jumpi
/* "#utility.yul":1646:1725 */
tag_65
tag_29
jump // in
tag_65:
/* "#utility.yul":1608:1727 */
tag_64:
/* "#utility.yul":1766:1767 */
0x00
/* "#utility.yul":1791:1844 */
tag_66
/* "#utility.yul":1836:1843 */
dup5
/* "#utility.yul":1827:1833 */
dup3
/* "#utility.yul":1816:1825 */
dup6
/* "#utility.yul":1812:1834 */
add
/* "#utility.yul":1791:1844 */
tag_37
jump // in
tag_66:
/* "#utility.yul":1781:1844 */
swap2
pop
/* "#utility.yul":1737:1854 */
pop
/* "#utility.yul":1532:1861 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":1867:1985 */
tag_38:
/* "#utility.yul":1954:1978 */
tag_68
/* "#utility.yul":1972:1977 */
dup2
/* "#utility.yul":1954:1978 */
tag_31
jump // in
tag_68:
/* "#utility.yul":1949:1952 */
dup3
/* "#utility.yul":1942:1979 */
mstore
/* "#utility.yul":1867:1985 */
pop
pop
jump // out
/* "#utility.yul":1991:2213 */
tag_14:
/* "#utility.yul":2084:2088 */
0x00
/* "#utility.yul":2122:2124 */
0x20
/* "#utility.yul":2111:2120 */
dup3
/* "#utility.yul":2107:2125 */
add
/* "#utility.yul":2099:2125 */
swap1
pop
/* "#utility.yul":2135:2206 */
tag_70
/* "#utility.yul":2203:2204 */
0x00
/* "#utility.yul":2192:2201 */
dup4
/* "#utility.yul":2188:2205 */
add
/* "#utility.yul":2179:2185 */
dup5
/* "#utility.yul":2135:2206 */
tag_38
jump // in
tag_70:
/* "#utility.yul":1991:2213 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":2219:2337 */
tag_39:
/* "#utility.yul":2306:2330 */
tag_72
/* "#utility.yul":2324:2329 */
dup2
/* "#utility.yul":2306:2330 */
tag_35
jump // in
tag_72:
/* "#utility.yul":2301:2304 */
dup3
/* "#utility.yul":2294:2331 */
mstore
/* "#utility.yul":2219:2337 */
pop
pop
jump // out
/* "#utility.yul":2343:2785 */
tag_17:
/* "#utility.yul":2492:2496 */
0x00
/* "#utility.yul":2530:2532 */
0x60
/* "#utility.yul":2519:2528 */
dup3
/* "#utility.yul":2515:2533 */
add
/* "#utility.yul":2507:2533 */
swap1
pop
/* "#utility.yul":2543:2614 */
tag_74
/* "#utility.yul":2611:2612 */
0x00
/* "#utility.yul":2600:2609 */
dup4
/* "#utility.yul":2596:2613 */
add
/* "#utility.yul":2587:2593 */
dup7
/* "#utility.yul":2543:2614 */
tag_39
jump // in
tag_74:
/* "#utility.yul":2624:2696 */
tag_75
/* "#utility.yul":2692:2694 */
0x20
/* "#utility.yul":2681:2690 */
dup4
/* "#utility.yul":2677:2695 */
add
/* "#utility.yul":2668:2674 */
dup6
/* "#utility.yul":2624:2696 */
tag_39
jump // in
tag_75:
/* "#utility.yul":2706:2778 */
tag_76
/* "#utility.yul":2774:2776 */
0x40
/* "#utility.yul":2763:2772 */
dup4
/* "#utility.yul":2759:2777 */
add
/* "#utility.yul":2750:2756 */
dup5
/* "#utility.yul":2706:2778 */
tag_38
jump // in
tag_76:
/* "#utility.yul":2343:2785 */
swap5
swap4
pop
pop
pop
pop
jump // out
/* "#utility.yul":2791:3013 */
tag_23:
/* "#utility.yul":2884:2888 */
0x00
/* "#utility.yul":2922:2924 */
0x20
/* "#utility.yul":2911:2920 */
dup3
/* "#utility.yul":2907:2925 */
add
/* "#utility.yul":2899:2925 */
swap1
pop
/* "#utility.yul":2935:3006 */
tag_78
/* "#utility.yul":3003:3004 */
0x00
/* "#utility.yul":2992:3001 */
dup4
/* "#utility.yul":2988:3005 */
add
/* "#utility.yul":2979:2985 */
dup5
/* "#utility.yul":2935:3006 */
tag_39
jump // in
tag_78:
/* "#utility.yul":2791:3013 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":3019:3162 */
tag_40:
/* "#utility.yul":3076:3081 */
0x00
/* "#utility.yul":3107:3113 */
dup2
/* "#utility.yul":3101:3114 */
mload
/* "#utility.yul":3092:3114 */
swap1
pop
/* "#utility.yul":3123:3156 */
tag_80
/* "#utility.yul":3150:3155 */
dup2
/* "#utility.yul":3123:3156 */
tag_32
jump // in
tag_80:
/* "#utility.yul":3019:3162 */
swap3
swap2
pop
pop
jump // out
/* "#utility.yul":3168:3519 */
tag_27:
/* "#utility.yul":3238:3244 */
0x00
/* "#utility.yul":3287:3289 */
0x20
/* "#utility.yul":3275:3284 */
dup3
/* "#utility.yul":3266:3273 */
dup5
/* "#utility.yul":3262:3285 */
sub
/* "#utility.yul":3258:3290 */
slt
/* "#utility.yul":3255:3374 */
iszero
tag_82
jumpi
/* "#utility.yul":3293:3372 */
tag_83
tag_29
jump // in
tag_83:
/* "#utility.yul":3255:3374 */
tag_82:
/* "#utility.yul":3413:3414 */
0x00
/* "#utility.yul":3438:3502 */
tag_84
/* "#utility.yul":3494:3501 */
dup5
/* "#utility.yul":3485:3491 */
dup3
/* "#utility.yul":3474:3483 */
dup6
/* "#utility.yul":3470:3492 */
add
/* "#utility.yul":3438:3502 */
tag_40
jump // in
tag_84:
/* "#utility.yul":3428:3502 */
swap2
pop
/* "#utility.yul":3384:3512 */
pop
/* "#utility.yul":3168:3519 */
swap3
swap2
pop
pop
jump // out
auxdata: 0xa2646970667358221220926b02fcdc9a5b2e602324be771e1ebae7f55654d2717c9828e5c76db6ec544064736f6c63430008100033
}
Binary:
608060405273cccccccc00003e800000000000000000000000006000806101000a81548173ffffffffffffffffffffffffffffffffffffffff021916908373ffffffffffffffffffffffffffffffffffffffff16021790555034801561006457600080fd5b506103b3806100746000396000f3fe608060405234801561001057600080fd5b50600436106100365760003560e01c8063671ef26c1461003b57806395c5fc0314610057575b600080fd5b610055600480360381019061005091906101f8565b610087565b005b610071600480360381019061006c9190610283565b610119565b60405161007e91906102bf565b60405180910390f35b60008054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff166323b872dd3330846040518463ffffffff1660e01b81526004016100e4939291906102e9565b600060405180830381600087803b1580156100fe57600080fd5b505af1158015610112573d6000803e3d6000fd5b5050505050565b60008060009054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff166370a08231836040518263ffffffff1660e01b81526004016101759190610320565b602060405180830381865afa158015610192573d6000803e3d6000fd5b505050506040513d601f19601f820116820180604052508101906101b69190610350565b9050919050565b600080fd5b6000819050919050565b6101d5816101c2565b81146101e057600080fd5b50565b6000813590506101f2816101cc565b92915050565b60006020828403121561020e5761020d6101bd565b5b600061021c848285016101e3565b91505092915050565b600073ffffffffffffffffffffffffffffffffffffffff82169050919050565b600061025082610225565b9050919050565b61026081610245565b811461026b57600080fd5b50565b60008135905061027d81610257565b92915050565b600060208284031215610299576102986101bd565b5b60006102a78482850161026e565b91505092915050565b6102b9816101c2565b82525050565b60006020820190506102d460008301846102b0565b92915050565b6102e381610245565b82525050565b60006060820190506102fe60008301866102da565b61030b60208301856102da565b61031860408301846102b0565b949350505050565b600060208201905061033560008301846102da565b92915050565b60008151905061034a816101cc565b92915050565b600060208284031215610366576103656101bd565b5b60006103748482850161033b565b9150509291505056fea2646970667358221220926b02fcdc9a5b2e602324be771e1ebae7f55654d2717c9828e5c76db6ec544064736f6c63430008100033
```
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