How do I can get the current block number in EOS? (in ethereum, I can use block.number).
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Are you trying to get the block number from inside a contract? Or from outside the EOS system?– John HaagerCommented Jul 17, 2018 at 18:19
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From inside a contract– WayneCommented Jul 18, 2018 at 18:55
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did you find the way to get current block id in the contract ?– Qiang FangCommented Sep 20, 2018 at 16:27
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2 Answers
I found a function tapos_block_num() in eosiolib/transaction.hpp. It looks return the block number in smart contract.
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I think it returns the last block prior the current block, did you confirm? Commented Jun 12, 2018 at 0:47
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2Actually, it returns the block referenced by the transaction, which could be pretty old. tapos = Transaction As Proof Of Stake. Commented Jun 17, 2018 at 2:27
In cleos you would do:
cleos get info
This returns the head_block_num and the last_irreversible_block_num. To receive addition information on the blocks returned.
cleos get block [number or ID of the block to retrieve]
https://developers.eos.io/eosio-cleos/reference#cleos-get-info
get_info Returns an object containing various details about the blockchain.
http://127.0.0.1:8888/v1/chain/get_info
{
"server_version": "d9ad8eec",
"head_block_num": 8592,
"last_irreversible_block_num": 8591,
"head_block_id": "00002190e805475db152be7d3f4f1a075efaed42827cd551b0e23c7feabbedac",
"head_block_time": "2018-04-27T17:40:34",
"head_block_producer": "eosio"
}
The response shows the head_block_num, the last_irreversible_block_num, the head_block_time, and the block producer.
https://developers.eos.io/eosio-nodeos/reference#get_info
get_block Returns an object containing various details about a specific block on the blockchain.
http://127.0.0.1:8888/v1/chain/get_block
{
"previous": "00000004471d48fe40706e73ce27f9cf7bac1704ae55279c7a58c0173718a711",
"timestamp": "2018-04-18T16:24:23.500",
"transaction_mroot": "e366c0cc3519bb0f2ddaec20928fa4d6aae546194bb1c4205c67be429147ed4a",
"action_mroot": "77e5e91b594ab4ebc44ebc8c7ecdc9d26409c5a07452d3b20a4840562fdeb658",
"block_mroot": "4ef85b0d212f3fffabdd65680d32dd7dded3461d9df226a6e3dc232e42978f8b",
"producer": "eosio",
"schedule_version": 0,
"new_producers": null,
"producer_signature": "EOSJzEdFDsueKCerL7a6AdxMxiT851cEiugFB7ux1PAGn5eMmco8j32NsaKupxibheQGVFEqyEdjMub67VZjKmsLzuNxxKtUA",
"regions": [{
"region": 0,
"cycles_summary": [
[{
"read_locks": [],
"write_locks": [],
"transactions": [{
"status": "executed",
"kcpu_usage": 2,
"net_usage_words": 38,
"id": "9880c128683e24845ccd282ebe026bd522f7fa9c6278d885f6ed35164c680669"
}]
}]
]
}],
"input_transactions": [],
"id": "000000056d75b0581b4fbb96affa36669a37173d21f46f8cb974f760e94bbe14",
"block_num": 5,
"ref_block_prefix": 2528857883
}
