9
votes
How are the originated contract addreses (KT1) computed?
In case someone needs precise calculations.
Say, you have an operation group hash onvsLP3JFZia2mzZKWaFuFkWg2L5p3BDUhzh5Kr6CiDDN3rtQ1D and an origination index 0 which is increased for every ...
- 1,148
8
votes
How to hash a Tezos public key
Heres how to do it in python, where the variable pubkey is the bytes array of the public key
P2HASH_MAGIC = bytes.fromhex('06a1a4')
blake2bhash = blake2b(pubkey, digest_size=20).digest()
shabytes = ...
- 869
7
votes
How are the originated contract addreses (KT1) computed?
KT1 addresses are computed from origination nonce. The origination nonce is made of operation hash (the operation that creates the origination) and its index (the index starts from 0 and it gets ...
- 817
7
votes
How is the hash code of blocks generated?
Take a byte representation of a particular block header:
http://rpc.tzkt.io/mainnet/chains/main/blocks/head/header/raw. The format of the block header is described in the docs.
Get a BLAKE2b (32bit) ...
- 1,148
5
votes
Creating public key hash
Try https://github.com/murbard/pytezos/blob/master/pytezos/crypto.py
from pytezos.crypto import Key
key = Key(key='mnemonic', passphrase='******', email='foo@bar.com')
key.public_key_hash()
>>&...
- 1,148
5
votes
How to hash a Tezos public key
Do you have the tezos repo built? If yes, you can run the ocaml CLI with tezos-crypto:
$ dune utop src/lib_crypto
and then:
ocaml# open Tezos_crypto;;
ocaml# Ed25519.Public_key.of_b58check_exn
...
- 532
4
votes
How to hash a Tezos public key
In python, using the git version of pytezos:
from pytezos.crypto import Key
public_key = 'edpkuoK2J2UVbDcSTdJgP85JmDN3gxBCswcgApbtY5d7zHVunwCKNR'
hash = Key(public_key).public_key_hash()
print(hash)
- 2,378
4
votes
Properties of transaction hashes
I was unable to find a complete answer, but here are some pointers. First, to clarify, I think you're asking about the format of operation hashes. A block consists of a set of operations. An operation ...
- 2,378
4
votes
Accepted
Get transaction detail from transaction hash in Tezos api
You can use TzKt's API for this.
Transaction by Hash will get the transaction details, and
Operation by Hash will get you any kind of operation details on Tezos.
Examples:
https://api.tzkt.io/v1/...
3
votes
Which hash function is used when converting an address from raw bytes?
It’s not hashed. You simply need to compute the base58 translation with the right prefix.
Proof that it’s not hashed: this process is reversible.
- 3,240
3
votes
Accepted
Converting a hash into an int within a range
There is no instruction in Michelson to interpret arbitrary bytes as numbers. The simplest way to achieve what you want is to use a constant table (as a Michelson map) from bytes of length 1 to their ...
- 2,563
3
votes
Accepted
Pseudo-random numbers for NFT attribute random generation
So my specific questions: Is there a way to get the next block hash within a smart contract?
No, there is no instruction in Michelson to query a block hash.
Or some other way to get a value that isn'...
- 2,563
2
votes
Accepted
Ledger Blake2b hash calculation
tl;dr: we serialize the michelson value to binary, we then hash those
bytes it with Blake2b-256. We base58 encode the result.
Long version
Let's consider the case of the Ledger Blake2b has of the
...
- 2,378
1
vote
Manipulable block hash by baker
blockhash can be manipulated by every single endorser. It should be avoided to be used as source of entropy.
- 11
1
vote
Choosing to validate a block or not & block hash ceation
I have block A, block B and block C. A baker is elected to bake the block B and C.
You first have the bakers who are supposed to bake at given levels and rounds, and then later you may have or not ...
- 940
1
vote
Authenticating users in contracts
You might want to have a look at the solution used in the Multisig contract supported by tezos-client. It is documented here.
In essence:
you can check signatures in Michelson using the ...
- 2,563
1
vote
Accepted
Authenticating users in contracts
Yes, the original solution is unsafe. Cross checking the sender address of the hash is really important.
Infact, the recent Wormhole Hack on a Solana contract was caused due to a vulnerability closely ...
- 351
1
vote
Accepted
Test vectors for calculating operation hash
You can test against the data that the official Tezos project uses for regression testing. This file might be of interest:
https://gitlab.com/tezos/tezos/-/blob/master/tezt/_regressions/protocol.alpha....
- 168
1
vote
How to I get my Public Hash Keys
The PDF you received from the ICO contains everything you need to activate your address, including your public hash (starts with tz1, tz2, or tz3).
- 3,402
1
vote
How to hash a Tezos public key
In NodeJS it is also possible to do it using sotez:
import {Key} from 'sotez';
const sotezKey = new Key({ key: 'edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE' });
await sotezKey.ready;
...
- 95
1
vote
How is the hash code of blocks generated?
Part 1 of my question was answered by Michael. What about the second part? Well, I just had a look at it. What I did is:
extract the full series of hash codes, from block 1 to the latest (VERY LONG). ...
- 955
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