Questions tagged [blocks]

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13
votes
4answers
2k views

Can someone explain the transaction struct?

{ expiration: '2018-05-09T10:21:48', region: 0, ref_block_num: 1055, ref_block_prefix: 4035814219, max_net_usage_words: 0, max_kcpu_usage: 0, delay_sec: 0, What is expiration, ...
10
votes
2answers
906 views

How often/consistent are blocks on EOS?

How often are blocks produced on EOS? Are they consistent? In Bitcoin the blocks are only mined on average within 10 minutes, not guaranteed 10 minutes - does EOS differ?
9
votes
1answer
910 views

Block data structure

Can someone explain the transaction_mroot, action_mroot and block_mroot used in block_header? I understand what a merkel tree is. Is transaction data actually stored in block or just the transaction ...
8
votes
2answers
1k views

What block hash function and transaction signature method does EOS use?

What hash function does EOS use for creating a block. Is it SHA-256? In addition, what procedure for signing a transaction is used? RSA?
6
votes
1answer
1k views

What is EOSIO max block size?

What is the EOS.IO software maximum block size? Does it even have such constant limit?
5
votes
1answer
145 views

Is the block digest c++ specific?

I'm not sure how to write this block header digest/hash generation in another language then C(++). Is this even possible without a lot of hacking? If so: Could a language-neutral format for the ...
5
votes
1answer
210 views

How does a node acquire new blocks from the network?

When running a non-producer node on the EOS blockchain, how does the node receive new blocks as they are produced? Are they sent to it from a particular node? Can the software receive blocks from ...
4
votes
1answer
1k views

how to know if a transaction was include in block?

In bitcoin and ethereum blockchain, I can get transactions's details that not included in blockchain yet via api. but in EOS blockchain ,it seems that there were no such api to get those information. ...
4
votes
1answer
65 views

Is it possible to see the state of a multi index table for a given block number?

Does the ability currently exist in EOS to see how the state of a persistent memory table was at some point in the past?
3
votes
1answer
101 views

Why does eos produce continuous blocks?

I am wondering about permanently producing blocks. Can someone explain why we need this ?
3
votes
2answers
355 views

What is a fork database?

There is a mention of a fork database in the docs for the bnet_plugin. Could you please tell me what the fork database is and how is it related to the state of the nodeos node?
3
votes
2answers
2k views

How to get current block number in smart contract? [duplicate]

How do I can get the current block number in EOS? (in ethereum, I can use block.number).
2
votes
2answers
151 views

How can I download all ledger blocks as a JSON dump?

I'm trying to download a relatively up-to-date dataset of all blocks in JSON format, but haven't found a good solution: cleos can only fetch blocks one by one ($ cleos get block n) which is way too ...
2
votes
1answer
317 views

What does it mean that block is irreversible

I mean there are block producers and there are currently just 21 TRUSTED ones. Why do we need to wait for 15/21 to fully "confirm" transaction? Because that means sometimes almost 3-4 minutes. ...
2
votes
1answer
661 views

EOS: How to get structured data within transaction?Is there restful API for this/

Suppose A sent a transaction to SC(smart contract), including structured data, for example: {"intention":"like","target":"ae16xx0...."} As usual, this transaction will be stored on all nodes in the ...
2
votes
1answer
96 views

How I can understand round-robin in DPOS?

DPoS is a system in which a fixed number of elected entities (called block producers or witnesses) are selected to create blocks in a round-robin order. If we have a BP 18th suddenly down, which ...
2
votes
1answer
226 views

list of confirmed and unconfirmed transactions of address / account

I wanna show users a list of confirmed and unconfirmed transactions of a specific EOS address or account name, using eosjs. Similar like a Ethereum block explorer. Any ideas or work arounds? If ...
1
vote
1answer
572 views

Can we get all the actions from all blocks?

Somebody say we can get all the blocks through rpc, then we can get all the actions. But I found that in the block information, there're no inline actions, so many inline actions will lose, right?
1
vote
1answer
42 views

What are the permissions on the eosio.prods accounts used for

eosio.prods has the following permissions (see https://eosauthority.com/account/eosio.prods#keys): 15/21 active (controls the eosio account) 11/21 prod.major 8/21 prod.minor these are updated at ...
1
vote
1answer
61 views

Block Meta Data

Is there a way to get block meta data only. For example: cleos get block 12345 returns all transactions within that block. All I am interested in is the metadata. Is there a way to return ...
1
vote
1answer
84 views

Preferred way to find a transaction's block

With the history plugin deprecated, what's the preferred way to find out which block a transaction is in?
1
vote
1answer
444 views

How exactly is the block height defined in EOS?

I wanna show users the confirmation height of their transactions. Which one is the way to go? Latest block - transaction block OR Last irreversible block - transaction block ?
1
vote
1answer
58 views

Is a transaction(like token transfer) could fail after being sent? if so, how can I get information about it?

In EOSIO, we know that a transaction can be packed in block very fast, and we can also treat it as irreversible after "lastirreversibleblock >= block_num". Whether a transaction could fail after ...
1
vote
1answer
183 views

How to start sync EOS with mainnet?

looks like EOS is not syncing? I can only see operators in log file and that's basically it. I am starting with these params: nodeos -e -p eosio \ --genesis-json='genesis.json' \ --plugin eosio::...
1
vote
0answers
64 views

How can I get all transactions made by an account?

I tried this history api of this function : func (api *API) GetTransactions(name AccountName) (out *TransactionsResp, err error) { err = api.call("account_history", "get_transactions", M{"...
1
vote
0answers
84 views

How to validate a block obtained with /v1/chain/get_block

Lets say that from outside the chain I call /v1/chain/get_block http endpoint. I would like to be able to post that JSON back to a contract thru a context free action and validate that the block is ...
0
votes
1answer
16 views

Why does eos block hash id not include character like “ghijklmnopqistuvwxyz”?

I fetched all the hashid of blocks from mainnet (block num 92077797~92150300) I noticed that the block id have no any characters like "ghijklmnopqistuvwxyz" Here is the test result with command for i ...
0
votes
2answers
92 views

How to find the number of the first block after a specific moment (unix time)?

I would like to query a range of blocks on the EOSIO mainnet which were created during a specific time span (for example, from unix time 1555500000 to 1555600000, which is around April 17-18, 2019). ...
0
votes
1answer
52 views

How is the the crash of a BP handled?

I am wondering if a BP crashes, how do the remaining 20 BPs know this? If they do not know, all block not irreversible so we can be hack? Please give me some details for this. Thanks!
0
votes
1answer
51 views

Back up EOS ecosystem

I read some comment on reddit and this page, some people talked, EOS uses 21 BPs as active, and all of rest are standby. So I think EOS will use a server as a gateway to handle this like HAProxy, ...
0
votes
0answers
14 views

EOSIO calculate transaction_mroot

As a general task i am trying to reverse engineer the production of a Block. With the help of EOSJS i was able to make a transaction from scratch and i can de/serialize it and sign it and so on. Now i ...
0
votes
0answers
93 views

EOS node stopped syncing blocks with a warning

does anyone can help me understand whats happening with nodeos? warn 2019-10-31T16:09:35.317 nodeos wabt.hpp:630 translate_one ] misaligned reference warn 2019-10-31T16:...
0
votes
1answer
43 views

Are all actions on a transaction supposed to be included in the block?

I've noticed something strange that is confusing me. I have a transaction that includes multiple actions on it, but it appears that the "transfer" action did not get recorded in the actual block. You ...