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2

Yes. You can use the getCode API. If that call returns 0x, there is no contract at that address. If it returns anything other than 0x, there is a contract at that address. As an example: web3.eth.getCode("0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8") .then(console.log); > "...


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Yes, the protocols will cross swords if the TokenInterface is not exactly the same. I had to use the interface as defined in the Balancer repo: interface TokenInterface { function balanceOf(address) external view returns (uint256); function allowance(address, address) external view returns (uint256); function approve(address, uint256) external ...


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We could add RNN or LSTM to select the set of feeds from Chainlink Oracles or the Subgraphs of the Graph Protocol. The RNN or LSTM networks can be deployed on the Chainlink nodes to sample and select the particular pattern of feeds. With the recent addition of Offline reporting feature in Chainlink this becomes more useful.


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This will essentially depend on the national/local legislation from which the law is applicable to such an asset. In general terms, as of today, the answer is NO unless there is an underlying contract signed by a public notary to validate the ownership of the asset through an NFT. If this is not granted, a theft of that physical asset can't be legally ...


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modify your build.gradle to this and rebuild (i usually use maven), the problem was probably with okhttp used in web3j dependencies { // https://mvnrepository.com/artifact/org.web3j/core implementation 'org.web3j:core:4.8.4' implementation 'org.springframework.boot:spring-boot-starter-web' testImplementation 'org.springframework.boot:spring-...


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It looks like you added liquidity to xSigmaDEX on the transaction before your cancellation. You can see here that you sent 900 USDC to the contract. In return, you received 898.222717188814448179 xSigmaDEX DAI/USDC/USDT LP tokens. I have never used that DEX, however, you should be able to remove your liquidity by sending those xSigmaDEX DAI/USDC/USDT LP ...


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Use RawTransactionManager public MyComponent(Web3j web3j) { this.web3j = web3j; this.gasProvider = new StaticGasProvider(new BigInteger(gasPrice), new BigInteger(gasLimit)); ... Credentials credentials = Credentials.create(privateKeyString); TransactionManager manager = new RawTransactionManager(web3j, credentials, 200, 500); Test ...


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You have to first create these contracts in order to get their address, change this: contract C { address a = address(A); address b = address(B); } To this: contract C { address a = address(new A()); address b = address(new B()); } Then you can read them like this: function getContractAddresses() view public returns(address, address) { ...


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View Smart Contract Function Calls With Bloxy Search for the smart contract using its' address with Bloxy. i.e. 1inch smart contract address: 0x111111111117dC0aa78b770fA6A738034120C302 Scroll down to the Smart Contract Function Calls section to view all smart contract function calls made. FYI - It seems 1inch never called renounceOwnership, therefore an ...


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Stack in Solidity means same as it means in any other machine or virtual machine. Stack is being allocated for call return addresses, function arguments and local variables. Besides limited by gas consumption, transactions are limited by stack size and cannot push more than 1024 EVM words on the stack. Probably the easiest place to study the stack usage in ...


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