NG#4 - Contract Address Calculation

Nov 14, 2023#StarkNet #Guide #Node Guardians693

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The ng4-start task is about deploying a hack contract on StarkNet and finding a specific contract address by modifying the salt. The hack contract is used to call the find_oasis function in another contract. The process involves deploying the hack contract using starkli, calculating the contract address using a SDK, and verifying the address. The address calculation involves using the pedersen function. Two rust libraries are mentioned for address calculation, but they are not suitable for this task. The author uses Starknet.js for address calculation. It is mentioned that the salt value needs to be hashed with the deployer address for the address to match with starkli. The author successfully finds the desired address by iterating through different salt values. The hack contract is then invoked using starkli to complete the task. Overall, the task requires familiarity with StarkNet and contract deployment and involves some off-chain calculations.

The text is a guide for a CTF (Capture The Flag) challenge related to the StarkNet blockchain platform. It provides instructions on how to deploy a hack contract and calculate a specific contract address using the StarkNet.js SDK.

The guide explains that the challenge involves deploying a hack contract that calls a target contract's function. It mentions the need to understand how StarkNet contracts are generated and provides a sample hack contract code.

The deployment process is described using the "starkli" tool, which involves building the contract, declaring it, and deploying it using a specific salt value. The resulting contract address is then calculated using the StarkNet.js SDK.

The guide also mentions the availability of two Rust libraries for calculating contract addresses but states that they were not suitable for the specific challenge requirements.

Finally, the guide summarizes the challenge and highlights the need for familiarity with StarkNet and contract interactions. It also mentions the use of SDKs for off-chain calculations.