Questions tagged [smart-contracts]
The smart-contracts tag has no usage guidance.
207
questions
6
votes
1answer
401 views
Storage and parameter size limitations of smart contract?
Got a few questions regarding storage limitations of smart contract.
What is the maximum number of bytes of data that I can send for a single transaction?
Is there a size limit to the storage of a ...
0
votes
1answer
49 views
ill_typed_data and invalid_contract_notation smart contract deployment error
I'm trying to deploy a smart contract on the testnet. I have made sure it is well typed. But I faced the error message below when trying to deploy on both bablynonnet and carthagenet. Could someone ...
1
vote
2answers
59 views
pytezos deploy kt
I'm following the https://baking-bad.github.io/pytezos/#originate-contract refs to originate a contract. I suspect that it has something to do with how I usually iniatialize the storage, so if anyone ...
0
votes
1answer
54 views
Initiate a field in the storage of a contract with the source address of origination
I have the following smart contract where I pass admin address in the init function of the smart contract: (you can run it on smartPy online editor)
class SC(sp.Contract):
def __init__(self, ...
1
vote
1answer
42 views
Parse address to string in smartPy
Can we parse a varialble of type sp.TAddress to sp.TString like this:
strAddress = sp.string(sp.address("tz1-add")) or strAddress = str(sp.address("tz1-add"))?
Smart Contract Example:
import ...
1
vote
1answer
38 views
Call a method with params that do nothing in a smart contract
I'm trying to invoke a method with parameters that do nothing (blank body) in a smart contract but that doesn't work even if the contract is correctly deployed to the blockchain.
Use case:
Smart ...
4
votes
1answer
155 views
How do I get the storage value of a bigmap using pair datatype as key with taquito library?
I am using the taquito library to interact with a smart contract that I have uploaded to carthagenet.
However, I am facing an issue in retrieving the value of a bigmap property in my smart contract ...
1
vote
1answer
113 views
Smart contract calls another smart contract's method with SmartPy
How can I call a smart contract method from another smart contract with smartPy?
Use Case:
Lest's imagine that we have:
Smart contract with a function increment(a)
Smart contract with a function ...
1
vote
1answer
38 views
sp.check_signature cryptographic function in SmartPy
I wanna ask about the parameters s and b in the cryptographic function:
sp.check_signature(k, s, b)
the second parameter s: is the string that we should inject in the blockchain or the signature ...
1
vote
1answer
46 views
Smart Contract Invocation using tezos-client and RPC requests failed
Network: Babylonnet test network
Network Version:
{
"chain_name": "TEZOS_ALPHANET_BABYLON_2019-09-27T07:43:32Z",
"distributed_db_version": 0, "p2p_version": 0
}
Case: I'm ...
2
votes
2answers
208 views
How to retrieve data from smart-contract using javascript?
I have stored data that I would like to retrieve from a deployed smart-contract.
The storage structure was defined using SmartPy:
def __init__(self):
self.init(bmap=sp.big_map(tkey=sp....
1
vote
1answer
18 views
How to fix 'paused before out-of-memory crash' contract deployment error in browser? [ConseilJS]
I wish to deploy a contract using ConseilJS that I am able to originate successfully using smartpy.io
However, when I copy the generated Michelson and initial storage into the following function:
...
0
votes
1answer
64 views
Type error, (sp.TRecord(addr = sp.TAddress)) is not (sp.TUnit) in smartPy
When I implement a getBalance in the FA1.2 function like this:
@sp.entryPoint
def getBalance(self, params):
return self.data.balances[params.addr]
As test:
scenario += c1.getBalance(addr = ...
1
vote
1answer
39 views
venv / entrypoint return storage?
3 questions:
1) someone use Smartpy in a venv as a pip3 package? I was thinking about printing some variables for debug purposes — there is a similar feature in the editor?
2) if you are in a ...
1
vote
1answer
39 views
Local variables within smart contracts (Smartpy)
I'd like to share a question that were being worked on Smartpy telegram, and also a few thoughts along the way (it's a long way -- random observation).
Some people were talking about local variables ...
1
vote
1answer
72 views
How to interact with SmartPy BigMap in contract?
I would like to setup a smart contract that contains (as defined by smartpy) a BigMap storage.
I have the following code:
import smartpy as sp
class contract(sp.Contract):
def __init__(self):
...
2
votes
1answer
45 views
How to create a mapping in smartpy ? Do we need to define the datatypes of the key & value like in solidity?
Want to implement mappings like this in smartpy :
// Mapping from token ID to owner
mapping (uint256 => address) private _tokenOwner;
// Mapping from token ID to approved address
mapping (...
2
votes
1answer
43 views
ConseilJS TezosContractIntrospector.generateEntryPointsFromAddress `Uncaught (in promise) TypeError: Cannot read property '0' of undefined`
Trying to retrieve contract entry points using the TezosContractIntrospector
The following code:
async function entry_points(){
const server={
url:'https://conseil-dev.cryptonomic-infra.tech:...
5
votes
2answers
101 views
How do I get a list of a Tezos smart contract KT1 address entrypoints and its parameters?
I wish to retrieve info from a KT1 address so I know which entrypoints are available for consuming and which are their parameters and types. How can I achieve this? Thanks in advance.
2
votes
3answers
64 views
Originate contract with init
I have a contract of type:
pair (pair (list nat) (pair mutez (map address (list nat))))
(pair address (pair address bool))
What is an example of a valid initial storage that can be passed to ...
4
votes
3answers
110 views
How are the originated contract addreses (KT1) computed?
How are smart contract addresses (those that start with KT1) computed?
I would like to know whether CHAIN_ID is somehow used in its computation, or it is possible to have two KT1 contracts with ...
3
votes
1answer
63 views
Error while initializing a Map in contract deployment
I was trying to deploy a vote smart contract on Tezos using tezos-client but because of initilization issue nothing was happening the right way.
The smart contract code in liquidity ( you can see the ...
1
vote
1answer
74 views
Call smart contract via RPC error
I am trying to call a smart contract via RPC, but keep getting this error:
"Failed to parse the request body: No case matched:\n At /kind,
unexpected string instead of endorsement\n At /kind, ...
2
votes
1answer
62 views
What happens if two smart contracts call each other?
Simple question. What happens if you have two smart contracts that recursively call each other in such a way that it will never end?
Will those calls just bounce back and forth until one of the ...
1
vote
2answers
108 views
How can one keep account active
Do I need to maintain certain amount of balance in order to keep my account active?
2
votes
1answer
179 views
How to deploy a smart contract influenced by UI inputs using ConseilJS and SmartPy generated Michelson?
I wish to be able to create a smart contract taking input from a UI to supply parameters pubKey,prvKey,pubHash for the deployment and minAmount and maxTime to influence the Michelson.
I have the ...
1
vote
2answers
55 views
How to total smartpy.TMutez type stored as values in smartpy.bigmap?
I have the following smartpy.bigmap in smart contract storage:
import smartpy as sp
self.data.init(bgmp=sp.bigmap(tkey=sp.TAddress,tvalue=sp.TMutez))
I would like to total all the stored tvalue so ...
2
votes
3answers
42 views
Searching through deployed smart contracts
I'm looking for a deployment of the multisig contract somewhere on the block chain. Is there any tools that lets me search through deployed contracts?
1
vote
0answers
25 views
How to define Tezos Contract start and end date? [duplicate]
Developing Smart Contract for Tezos, How i can define Tezos Contract start and end date ? it should only work between given date.
2
votes
2answers
99 views
Tezos Blockchain Time in SmartPy
I am new to Tezos Block chain and I am writing a smart-contract for crowdfunding using smartPy.
For this I need current date time of Tezos Block chain. So, can anyone help me out, how to find out this?...
2
votes
2answers
70 views
How do you discover the indexes of the big maps of a contract?
How do you discover the indexes of the big maps of a contract? It seems you would have to inspect the storage, and correlate with the type of the storage, and pick out the numbers that correspond to ...
1
vote
1answer
42 views
Is there a parameter we can add to a KT1 contract so that it expires after a certain amount of blocks?
I'm asking because I would like certain KT1 addresses return the funds back to the owner after a certain amount of blocks
1
vote
1answer
38 views
How to format the call to the “do” entry point on manager.tz contracts in order to transfer funds to account X"
I accidentally set the account manager for a smart contract to a baker I was trying to delegate to.
https://better-call.dev/main/KT1VSiaepk9USGAHDjJQAm4aaYRC6J8dTBHG/operations
Now I need to figure ...
1
vote
1answer
204 views
Delegating from a Kt1 address locked my coins, how can I fix it?
Might have royally messed up here, but I added an address via command line with
./tezos-client add address stakingfacilities tz1WpeqFaBG9Jm73Dmgqamy8eF8NWLz9JCoY
(for stakingfacilities baker in ...
3
votes
1answer
51 views
What happens when a smart contract receives two transactions with different outcomes?
Let's say that we have a smart contract where the argument passed along the transaction updates the value "lastAccount" which is equal to the pkh of the transaction sender.
If, at the same time, two ...
1
vote
1answer
180 views
How do you create a secondary KT1 contact under your TZ address?
I want to have multiple KT1 address on one TZ address(ledger) to delegate to multiple people
1
vote
0answers
16 views
Split function contract template
Is there a code template for a simple contract which splits the incoming funds and sends them proportionally to a list of pre-registered addresses?
Example:
Contract has the following functions:
...
2
votes
1answer
37 views
Where can I go to study how to make smart contracts
In particular, I have an idea, I want to create a contract to delegate Tezos to a designated baker, but in a more long term contract, where he can use my delegation as bond, however if he double bakes ...
0
votes
1answer
116 views
Originating an account in Bablyonnet - error in contract script
I'm trying to originate a contract in Tezos so I can test delegating to a baking account.
I was able to do this before the upgrade to babylonnet, but now that a script is required for the contract, I'...
1
vote
1answer
120 views
How to verify the manager.tz script code?
Since the protocol update to Babylon all KT1 accounts were replaced with smart contracts which contain the manager.tz script.
Code:
parameter
(or
(lambda %do unit (list operation))
(unit ...
1
vote
1answer
43 views
Transfer from smart contracts?
Can smart contract account (address starting with KT1) transfer Tezos to other accounts? I know this is possible for plain vanilla KT1 account.
1
vote
2answers
117 views
Where are the API docs for SmartPy?
I'm working on a contract now and specifically I'd like to call a SmartPy API like sp.transfer(address, amount)? Is there a function like this?
I can't find API docs for SmartPy and digging into the ...
3
votes
1answer
58 views
Does a smart contract browser or explorer exist?
Is there any smart contract browser or explorer currently available? (i.e. a web browser-based tool where someone can easily audit the code held in the blockchain)
3
votes
0answers
46 views
Choosing a language [closed]
I want to start using Tezos and one of the problems that I found as opposite to Ethereum where Solidity highlights, is that seems to be a lot of options to start writing contracts.
I've been ...
2
votes
1answer
171 views
How do I get the contents of a big_map through the RPC interface?
I'm trying to view the contents of a big_map in the storage of a smart contract. However, querying my Tezos node doesn't seem to provide that information. Is there a way of using the RPC interface to ...
3
votes
1answer
57 views
Why cant i call the contract entry point with type parameter througth eztz.contract.send
im trying to call the entry point create_proposition ...
(pair :proposition %_Liq_entry_create_proposition
(key_hash %destination)
(mutez %amount))
using the function eztz.contract....
2
votes
1answer
45 views
Getting errors related to the smart contract after running eztz.contract.send()
im tryng to send a operation to a previously deployed contract and im geting these errors,
error: "Operation Failed"
errors: (3) […]
0: {…}
contract: "...
3
votes
1answer
77 views
how can i send operation throught eztz to a contract specific entry point?
im tryng to send the operation to a deployed contract, this is my function ...
eztz.contract
.send(
"KT18qHvhEZUwiawA8QEURwuK8RGJj184725L",
keysext.pkh,
keysext.sk,
5,
"RIGHT LEFT UNIT",
"...
4
votes
1answer
60 views
Can someone provide a link to a tutorial on how to do a basic smart contract on the Tezos protocol?
I'm looking for a video tutorial on how to become a programmer/how to become more knowledgeable regarding smart contracts and such. Is there a good you-tuber who blogs about Tezos programming?
1
vote
1answer
332 views
Smart contract transaction of 0 XTZ throwing error from TezBox
I am trying to send transaction to KT1BRudFZEXLYANgmZTka1xCDN5nWTMWY7SZ to complete ledger nano verification using TezBox but I am getting error as below, can someone please guide me?
{"status":"...
