Using the Block Explorer


Overview

A block explorer based on Insight is provided for the Decred network. All blocks and transactions in the Decred blockchain are visible through use of this block explorer, located at https://mainnet.decred.org and https://testnet.decred.org for the testnet wallet. Below is a quick review of some of the information on it.

Option Explanation
Height The block number.
Age How long ago the block was added to the blockchain.
Transactions The number of transactions included in the block.
Votes The number of proof-of-stake votes included in the block.
Fresh Stake The number of new tickets purchased in this block.
Size The size (in bytes) of the block.

Under Latest Transactions, you can see the transaction ID (txid) and the value (in DCR) transmitted across the network.


Blocks

Blocks can be found by searching for their block height number, clicking on a Height value from the home page, or from their BlockHash value. Older blocks will have lower block numbers. The top half of a block overview shows relevant information about this specific block. This information includes: the block height, the block hash, and several key network parameters, described below:

Option Explanation
Number of Transactions The number of standard transactions (DCR sent from one user to another).
Height The height of the blockchain in which this block resides.
Block Reward The amount of new DCR minted in this block.
Timestamp The time this block was created by a miner and was included in the blockchain.
Merkle Root A hash value of all the transaction hashes included in this block.
Stake Root A hash value of all the stake related transaction hashes in this block. This includes ticket purchases, votes, and ticket revocations.
VoteBits (1) Block was approved by proof-of-stake voters. (2) Block was vetoed by proof-of-stake voters and all non-stake transactions in the block were invalidated, along with the proof-of-work miner and development subsidy.
Final State The final state of the pseudo random number generator used for ticket selection.
Voters The number of successful proof-of-stake votes cast in this block. The maximum value is 5.
Fresh Stake The number of stake ticket purchases confirmed in this block.
Revocations The number of tickets that failed to vote and were revoked.
PoolSize The total number of active proof-of-stake tickets.
Difficulty The proof-of-work network difficulty.
SBits The price of one proof-of-stake ticket.
Bits A compact version of the network difficulty at the time the block was mined.
Size The size of the block (in bytes).
Version The version of the block.
Nonce The value used by a miner to find the correct solution for this block.

Transactions

This section lists all the transactions that were mined into this block. Transactions are chosen from the network mempool in order of highest fee first. All transactions in the block overview follow this order: Standard transactions (peer-to-peer transfer), proof-of-stake votes, proof-of-stake ticket purchases. The following sections will review each type of transaction.


Standard transactions

Here is the information included in an unconfirmed standard transaction that went through the Decred network. Unconfirmed means it has not been included into a block yet, which implies it is a very recent transaction or it was sent with a very low fee.

Option Explanation
Size The size of the transaction in bytes.
Fee rate The rate of fees collected by the network (per kB).
Received Time The time the network confirmed the transaction.
Mined Time The time a miner included the transaction in a block.
Included in Block The block number that the transaction became a part of.

Note Received Time, Mined Time, and Included in Block will not have a value until a miner confirms the transaction. Depending on the fees in the mempool, this will take five minutes on average. Once there is at least one confirmation, the transaction is considered complete.


Ticket purchases

FOr a ticket purchase (stake submission) there are a few differences from a standard transaction shown.

Note the difference under details: The word Ticket appears above the sender’s wallet address on the left, and the words Subsidy Commitment appear on the right. This particular user purchased a stake ticket for 8.75411638 DCR and received change in the amount of 7.15994209 DCR. The address listed on the left under Ticket is the address that that contains the funds used to purchase this ticket. The first output on the right is the address that retains voting rights for this specific ticket. The second output, Subsidy Commitment, is the address where the reward will go. This is not yet shown by the block explorer at this time. The third and final output is the address where change for this transaction will be sent.


Proof-of-stake votes

Note the identifying terms in the details section: Vote, Stake Base, Block Commitment, and Vote Bits:

These keywords indicate that this transaction is a vote that was cast from a proof-of-stake ticket holder. In this particular example, the user had previously purchased a ticket for 8.99472311 DCR and was sent 10.82959184 DCR after the vote was cast in this transaction.