Ethereum Sign up or log in to customize your list._ Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top up vote down vote favorite 2 I'd like to know the detail of the Ethereum transaction data structure.What data is stored in transaction?transactions raw-transaction calldata up vote down vote An Ethereum transaction - as in, what you pass to sendRawTransaction() - consists of the following fields, in order and RLP-encoded (note that the field names are not part of the encoded data): nonce - transaction sequence number fr the sending account gasprice - price you are offering to pay startgas - maximum amount of gas allowed for the transaction to - destination address (account or contract address) value - eth to transfer to the destination, if any data - all of the interesting stuff goes here v - along with r and s makes up the ECDSA signature r s Any payload, whether raw data or a contract function signature and parameters, is encoded into the data field.

Some references: Transaction (python) rlp.Serializable (python) ECDSA parameters Did you find this question interesting?Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox ().up vote 2 down vote you can check a transsaction by its hash, for instance in eth : > web3.eth.getTransaction('0xc5eee3ae9cf10fbee05325e3a25c3b19489783612e36cb55b054c2cb4f82fc28') { blockHash: '0xdb85c62ef50103f08e9220b59d6c08cbfb52e61d84926dedb3fe9b6940e6bbea', blockNumber: 290081, from: '0x1dcb8d1f0fcc8cbc8c2d76528e877f915e299fbe', gas: 90000, gasPrice: 50000000000', hash: '0xc5eee3ae9cf10fbee05325e3a25c3b19489783612e36cb55b054c2cb4f82fc28', input: '0x', nonce: 34344, to: '0x702bd0d370bbf0b97b66fe95578c62697c583393', transactionIndex: 0, value: 5000111390000000000' } which you can see in a blockchain scanner here Your Answer Sign up or log in Sign up using Google Sign up using Email and Password Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service.tor bitcoin double

Browse other questions tagged transactions raw-transaction calldata or ask your own question.In this post I present why I believe that the current decentralized app interaction process for your normal, everyday user introduces a tremendous amount of security risk for those users, and I propose a solution called TAP, that can be used to reduce the risk.bitcoin foundation canadaTAP aims to:You can think of TAP as a decentralized Norton AntiVirus for the Ethereum blockchain, that adds a lot more information about what’s happening when users execute Ethereum transactions.DApp Interaction Process TodayThe Ethereum community is anxiously looking forward to the launch of many of the upcoming DApps and the decentralized economic opportunities they will bring.titan bitcoin ebayAs long as people understand the smart contracts running behind the DApp, they get all the benefits of decentralization without the risks of trusting a central third party.ltc bitcoin mining

However it is big leap to assume that the average consumer using a DApp, actually understands the smart contract, and even if they do, it is a big leap to assume that they have gone through all the steps to connect the action they are taking in the interface of a particular DApp, to the smart contract code that they believe will be invoked.reddit instant bitcoinTo see this weakness in action, let’s take a look a DApp that we recently developed, AuctionHouse, and analyze what the problem is with consumer interaction.AuctionHouse is an application for auctioning and bidding on assets on the blockchain.bitcoin bricks reviewUsers can take the actions you’d normally take on eBay, like list an item for sale, place a bid, and end an auction.ganar bitcoin con iphone

Here’s what it looks like to place a bid in the AuctionHouse web interface.Each interaction that writes data to the blockchain, requires that the user signs the transaction with their Ethereum private key, so when a user hits that “Place Bid” button, they have to confirm their transaction.In many cases they’ll do this using a wallet/signer like Metamask, uPort, Mist, Parity Signer, or other options.fast company ethereumHere’s what the experience looks like if they use Metamask.This popup gives the user the valuable information of how much ETH they are sending as part of their transaction, and what the gas costs may be.bitcoin made me a millionaireBut in reality, when they hit that “ACCEPT” button, they are really risking everything controlled by their account, other than ETH, to the DApp.This includes any Assets that the account controls (virtual goods, shares in DAO’s, etc), as well as any tokens the account controls like REP, DGD, or MKR.

This is the case because:It’s unreasonable to assume that most users using a DApp are going to take any of these steps.It goes without saying that you shouldn’t use smart contracts that you don’t understand and trust, but I believe that this will be a huge blocker for mainstream consumers beginning to use DApps without suffering unexpected consequences.So how can we do better?One project that Eric Tang and I have been working on is TAP, which stands for Transaction Attestation Protocol.It’s aimed at providing more metadata and transparency around the transactions that users are about to sign, before they sign them.Here’s the same example from above, with a demonstration of what Metamask could look like with integrated TAP data:In this case the user is presented with the name of the function that’s being called, a description of what it intends to do, a big green “Safe” indicator, and some metadata about the number of attestations or audits that have been given to this function.

In the case of an unsafe function, they may see something that looks more like:Here the user sees a description of a known exploit, and the user who provided this attestation along with their reputation.Both examples link to a full attestation report, which can contain many attestations from many different users, each with the following data:These attestations are provided by the community including, hopefully, the author of the smart contract and any auditors who verified the smart contract before launch.The community can vote attestations up or down if they find them useful or inaccurate, and the user’s reputation is derived from their activity in TAP and users’ curations of their attestations.By optionally linking your address to Github, you can establish further reputation through your identity in order to have your attestations carry more weight with users.The full report, may look something like this wireframe:Why would users do this and spend their time giving attestations?Of course for high value contracts, benevolence to the community is one reason people may participate, but further incentives can come in two forms:Attestations live on IPFS and references to them are written to the blockchain, so the system is meant to be fully decentralized and community driven.

The data is available to everyone, and we think the best places to embed TAP data are:TAP is under development but isn’t launched yet.It’s code, and open issues for discussion, are on Github.This project is an idea that we want to see exist within the community, but since we have no intention to run it as a business, we’ll need community support to let it realize it’s full potential.We’ve currently developed the basis for the smart contracts, the example schemas for attestations, and the beginnings of the JS libraries to glue the IPFS pieces of the protocol to the Ethereum blockchain pieces of the protocol.We haven’t finalized the schemas for what gets included in attestations so we invite you to take a look at the code on Github, and to weigh in on the following issues:We have the framework for the JS library that would let any developer build a web solution that includes TAP data or submits TAP attestations, but we are also working on a sample front end that serves as the main TAP hub.