I cant get my new token to go public. I am throwing the following error! Please help

I am attempting to compile my test token to a live setting. When I compile, I get the following error. I assume that this callback is not reaching the destination. myc:3:1: ParserError: Source “EIP20Interface.sol” not found: File import callback not supported import “./EIP20Interface.sol” ^—————————-^ I am using v0.4.21+commit.dfe3193c and have made sure that the optimization…

Real time access of transaction using websockets and web3py

I want to build the backend in Django using django channels that access the realtime blockchain data. Here is my smart contract. mapping(uint => Task) public tasks; event TaskCreated( uint id, string content, bool completed ); function createTask(string memory _content) public { taskCount ++; tasks[taskCount] = Task(taskCount, _content, false); emit TaskCreated(taskCount, _content, false); } How…

Transaction malleability in Testnet

I want to replicate transaction malleability to study it. I have two transactions data signed in testnet. One it’s the original, 0200000001abb6c7df544b53eec11612ab9d82ef0fe0a3aa2ff33f41bbf5f149986d80af47000000006a47304402207a325de81b063d3e28023a63c37c554e7eb136d94612334bbd6715a05abb684e02203a87c85819815bb12d4386fa76aa6b990c65158b61ccb05a14a249e14095663b012103bf7b2ddadda97523405400ae95be2cb153768cce8b1bed55d1c8aca4bb2ee16dffffffff02e8030000000000001976a914fd1002f92de062322225735e24b85590a3ef7af288ac29e31100000000001976a9146162f487e0b293054f1fb8025769f1e1f14d379b88ac00000000 The second one is the transaction “malleated”. 0200000001abb6c7df544b53eec11612ab9d82ef0fe0a3aa2ff33f41bbf5f149986d80af47000000006c527547304402207a325de81b063d3e28023a63c37c554e7eb136d94612334bbd6715a05abb684e02203a87c85819815bb12d4386fa76aa6b990c65158b61ccb05a14a249e14095663b012103bf7b2ddadda97523405400ae95be2cb153768cce8b1bed55d1c8aca4bb2ee16dffffffff02e8030000000000001976a914fd1002f92de062322225735e24b85590a3ef7af288ac29e31100000000001976a9146162f487e0b293054f1fb8025769f1e1f14d379b88ac00000000 Before send the first one and after send the malleated transaction. I receive txn-mempool-conflict (code 18) I can’t replicate the transaction malleability if the original…

I’ve seen a transaction with 24 ancestors in the mempool, Is there a sensible use of this?

I’ve seen a transaction with 24 ancestors in thee mempool, Is there a sensible use of this? Or is a kind of spam or something else? It got mined on block 613101 $ getmempoolentry 132c52367b5e8c6abe87eee8bc60032c58f3d1296b8ca216373d924d94013d45 { “fees”: { “base”: 0.00000202, “modified”: 0.00000202, “ancestor”: 0.00019743, “descendant”: 0.00000202 }, “size”: 202, “fee”: 0.00000202, “modifiedfee”: 0.00000202, “time”: 1579178958,…

scriptsig-not-pushonly (code 64) during send transaction in regtest

I create a transaction in regtest without send it, I have transaction data signed. I modified a little bit the scriptSig in order to replicate transaction malleability, I add two operations (2 OP_DROP) and increase the scriptSig length from 6A to 6C. this is my final result. 0200000001b6a6018077d7e817c13074f4127a641a3225b44e56318ef61d2b746b0271e308000000006c527547304402205fa24c98406b9f18732a586a2d5a5cf8ed5e033afca89dda772963f87bff457d022020c796be2fd4c6c47733214293263e244828211a51f044872090e610d5e1e8820121024f29076388ac6ed18b281a149e88043be7e78f72e138f3498853d8918f7f5448ffffffff01606b042a010000001976a914f1edb261a91e7cb03737708d718b2c47b7aa5c8e88ac00000000 When I try to send rawtransaction I…

Implementation of BIP39, I want to generate a BIP39 512-bits seed from 12 mnemonics but failed

I have a question. I used the website (https://www.mobilefish.com/download/ethereum/bip39.html) to generate a 12-words mnemonic(English word list) without password and got below: “organ rate senior panel first task siren room deer excite bachelor project” And the 512-bits seed is like: “53329c51c9416d4d2fe46ecd8edab1c9a5289b3366c98bb6ee843e7bd4242ee46b6be686aef697d23278062d8c033cf2788df96cc4f24375682f36eb9a66996d” However, I tried to generate 512-bits seed by myself but failed. I used online PBKDF2…

BITCOINJ: how to make my wallet aware again about change of my transaction status after my server restart?

Using bitcoinj, my server created a transaction and it was broadcasted on the blockchain. I can get its history using: walletAppKit.wallet().getTransaction(txHash) It is in Pending state. Then I stopped my server before the transaction get confirmed. Then I started the server again, and I was still getting Pending status when calling walletAppKit.wallet().getTransaction(txHash), although the status…