├── .env
├── LICENSE
├── README.md
├── challenge.yml
├── contracts
    └── Example.sol
├── docker-compose.yml
└── flag.txt


/.env:
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1 | WEB3_PROVIDER_URI=http://ethereum:8545
2 | ALLOC_ADDRESS_PRIVATE_KEY=1a244b0c79968c206e59c7ac07751c2767ad949c1fdd25a8223d521825e81bd6
3 | 


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/LICENSE:
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 1 | This is free and unencumbered software released into the public domain.
 2 | 
 3 | Anyone is free to copy, modify, publish, use, compile, sell, or
 4 | distribute this software, either in source code form or as a compiled
 5 | binary, for any purpose, commercial or non-commercial, and by any
 6 | means.
 7 | 
 8 | In jurisdictions that recognize copyright laws, the author or authors
 9 | of this software dedicate any and all copyright interest in the
10 | software to the public domain. We make this dedication for the benefit
11 | of the public at large and to the detriment of our heirs and
12 | successors. We intend this dedication to be an overt act of
13 | relinquishment in perpetuity of all present and future rights to this
14 | software under copyright law.
15 | 
16 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19 | IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 | OTHER DEALINGS IN THE SOFTWARE.
23 | 
24 | For more information, please refer to <https://unlicense.org>
25 | 


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/README.md:
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1 | # solidity-ctf-template


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/challenge.yml:
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 1 | contract: Greeter # The class name of the challenge contract
 2 | 
 3 | description: |
 4 |   Can you make the isSolved() function return true?
 5 | 
 6 | constructor:
 7 |   args: ["hello"]        # The argument(s) to be passed to the contract constructor
 8 |   value: 0               # The amount of wei to be sent to the contract upon deployment
 9 |   #gas: 1000000          # The gas limit to execute the contract constructor, default is the response value of the eth_estimateGas JSON-RPC
10 | 
11 | show_source: True        # Set to False if you don't want the contract source code to be displayed to players
12 | 
13 | # solved_event: EmitFlag # Verify the challenge has been solved by checking if the event was emitted instead of calling the isSolved() view function by default
14 | 
15 | 


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/contracts/Example.sol:
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 1 | // SPDX-License-Identifier: UNLICENSED
 2 | pragma solidity 0.8.9;
 3 | 
 4 | contract Greeter {
 5 |     string greeting;
 6 | 
 7 |     constructor(string memory _greeting) {
 8 |         greeting = _greeting;
 9 |     }
10 | 
11 |     function greet() public view returns (string memory) {
12 |         return greeting;
13 |     }
14 | 
15 |     function setGreeting(string memory _greeting) public {
16 |         greeting = _greeting;
17 |     }
18 | 
19 |     function isSolved() public view returns (bool) {
20 |         string memory expected = "HelloChainFlag";
21 |         return keccak256(abi.encodePacked(expected)) == keccak256(abi.encodePacked(greeting));
22 |     }
23 | }
24 | 


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/docker-compose.yml:
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 1 | version: "3"
 2 | services:
 3 |   challenge:
 4 |     image: chainflag/solidctf:1.0.0
 5 |     restart: unless-stopped
 6 |     ports:
 7 |       - "20000:20000"
 8 |     env_file:
 9 |       - .env
10 |     volumes:
11 |       - ./flag.txt:/ctf/flag.txt
12 |       - ./contracts:/ctf/contracts
13 |       - ./challenge.yml:/ctf/challenge.yml
14 | 
15 |   ethereum:
16 |     image: chainflag/fogeth:latest
17 |     restart: unless-stopped
18 |     container_name: fogeth
19 |     ports:
20 |       - "8545:8545"
21 |     env_file:
22 |       - .env
23 |     volumes:
24 |       - ./data:/data
25 |       - ./logs:/var/log/nginx
26 | 
27 |   faucet:
28 |     image: chainflag/eth-faucet:1.1.0
29 |     restart: unless-stopped
30 |     container_name: eth_faucet
31 |     ports:
32 |       - "8080:8080"
33 |     links:
34 |       - ethereum
35 |     env_file:
36 |       - .env
37 |     command: -wallet.provider http://ethereum:8545 -wallet.privkey ${ALLOC_ADDRESS_PRIVATE_KEY} -faucet.minutes 1
38 |     depends_on:
39 |       - ethereum
40 | 


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/flag.txt:
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1 | flag{placeholder}
2 | 


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