Contract Factories2019 Community Moderator ElectionWhat is the BigMap container and why does it...

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Contract Factories



2019 Community Moderator ElectionWhat is the BigMap container and why does it matter?Parameter passed when calling CONTRACT in michelsonA contract calling another contractGet a returned value when calling a Michelson contractHow can I deploy a Michelson smart contract?Is there a way to call a function inside a contract from a function in another contract?












4















Has there been any research into how a contract factory might be made in Michelson/Liquidity?



To elaborate, in Solidity a contract factory might look like:



pragma solidity ^0.4.8;

contract Bakery {

// index of created contracts

address[] public contracts;

// useful to know the row count in contracts index

function getContractCount()
public
constant
returns(uint contractCount)
{
return contracts.length;
}

// deploy a new contract

function newCookie()
public
returns(address newContract)
{
Cookie c = new Cookie();
contracts.push(c);
return c;
}
}


contract Cookie {

// suppose the deployed contract has a purpose

function getFlavor()
public
constant
returns (string flavor)
{
return "mmm ... chocolate chip";
}
}


(referenced from https://ethereum.stackexchange.com/questions/13415/deploy-contract-from-contract-in-solidity)



This is a powerful feature in DAPP development, as it allows you to build an object oriented structure for your DAPP where requests can create new contracts. It is a well established design pattern, so what would the equivalent be in the Tezos ecosystem?










share|improve this question























  • It appears like CREATE_CONTRACT { storage 'g ; parameter 'p ; code ... } would work, but this will bloat the size of a contract a bit, and it feels like there should be a way to handle this gracefully like in Solidity's Java style class instantiation.

    – Rob
    3 hours ago











  • If not, a clean example in Michelson would be nice.

    – Rob
    3 hours ago













  • ok cool, probably a ways out then.

    – Rob
    3 hours ago






  • 1





    I put a comment that I deleted to convert it into an answer. I missed your comment that was added afterwards. My apologies for this.

    – FFF
    3 hours ago
















4















Has there been any research into how a contract factory might be made in Michelson/Liquidity?



To elaborate, in Solidity a contract factory might look like:



pragma solidity ^0.4.8;

contract Bakery {

// index of created contracts

address[] public contracts;

// useful to know the row count in contracts index

function getContractCount()
public
constant
returns(uint contractCount)
{
return contracts.length;
}

// deploy a new contract

function newCookie()
public
returns(address newContract)
{
Cookie c = new Cookie();
contracts.push(c);
return c;
}
}


contract Cookie {

// suppose the deployed contract has a purpose

function getFlavor()
public
constant
returns (string flavor)
{
return "mmm ... chocolate chip";
}
}


(referenced from https://ethereum.stackexchange.com/questions/13415/deploy-contract-from-contract-in-solidity)



This is a powerful feature in DAPP development, as it allows you to build an object oriented structure for your DAPP where requests can create new contracts. It is a well established design pattern, so what would the equivalent be in the Tezos ecosystem?










share|improve this question























  • It appears like CREATE_CONTRACT { storage 'g ; parameter 'p ; code ... } would work, but this will bloat the size of a contract a bit, and it feels like there should be a way to handle this gracefully like in Solidity's Java style class instantiation.

    – Rob
    3 hours ago











  • If not, a clean example in Michelson would be nice.

    – Rob
    3 hours ago













  • ok cool, probably a ways out then.

    – Rob
    3 hours ago






  • 1





    I put a comment that I deleted to convert it into an answer. I missed your comment that was added afterwards. My apologies for this.

    – FFF
    3 hours ago














4












4








4


1






Has there been any research into how a contract factory might be made in Michelson/Liquidity?



To elaborate, in Solidity a contract factory might look like:



pragma solidity ^0.4.8;

contract Bakery {

// index of created contracts

address[] public contracts;

// useful to know the row count in contracts index

function getContractCount()
public
constant
returns(uint contractCount)
{
return contracts.length;
}

// deploy a new contract

function newCookie()
public
returns(address newContract)
{
Cookie c = new Cookie();
contracts.push(c);
return c;
}
}


contract Cookie {

// suppose the deployed contract has a purpose

function getFlavor()
public
constant
returns (string flavor)
{
return "mmm ... chocolate chip";
}
}


(referenced from https://ethereum.stackexchange.com/questions/13415/deploy-contract-from-contract-in-solidity)



This is a powerful feature in DAPP development, as it allows you to build an object oriented structure for your DAPP where requests can create new contracts. It is a well established design pattern, so what would the equivalent be in the Tezos ecosystem?










share|improve this question














Has there been any research into how a contract factory might be made in Michelson/Liquidity?



To elaborate, in Solidity a contract factory might look like:



pragma solidity ^0.4.8;

contract Bakery {

// index of created contracts

address[] public contracts;

// useful to know the row count in contracts index

function getContractCount()
public
constant
returns(uint contractCount)
{
return contracts.length;
}

// deploy a new contract

function newCookie()
public
returns(address newContract)
{
Cookie c = new Cookie();
contracts.push(c);
return c;
}
}


contract Cookie {

// suppose the deployed contract has a purpose

function getFlavor()
public
constant
returns (string flavor)
{
return "mmm ... chocolate chip";
}
}


(referenced from https://ethereum.stackexchange.com/questions/13415/deploy-contract-from-contract-in-solidity)



This is a powerful feature in DAPP development, as it allows you to build an object oriented structure for your DAPP where requests can create new contracts. It is a well established design pattern, so what would the equivalent be in the Tezos ecosystem?







michelson






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 3 hours ago









RobRob

2885




2885













  • It appears like CREATE_CONTRACT { storage 'g ; parameter 'p ; code ... } would work, but this will bloat the size of a contract a bit, and it feels like there should be a way to handle this gracefully like in Solidity's Java style class instantiation.

    – Rob
    3 hours ago











  • If not, a clean example in Michelson would be nice.

    – Rob
    3 hours ago













  • ok cool, probably a ways out then.

    – Rob
    3 hours ago






  • 1





    I put a comment that I deleted to convert it into an answer. I missed your comment that was added afterwards. My apologies for this.

    – FFF
    3 hours ago



















  • It appears like CREATE_CONTRACT { storage 'g ; parameter 'p ; code ... } would work, but this will bloat the size of a contract a bit, and it feels like there should be a way to handle this gracefully like in Solidity's Java style class instantiation.

    – Rob
    3 hours ago











  • If not, a clean example in Michelson would be nice.

    – Rob
    3 hours ago













  • ok cool, probably a ways out then.

    – Rob
    3 hours ago






  • 1





    I put a comment that I deleted to convert it into an answer. I missed your comment that was added afterwards. My apologies for this.

    – FFF
    3 hours ago

















It appears like CREATE_CONTRACT { storage 'g ; parameter 'p ; code ... } would work, but this will bloat the size of a contract a bit, and it feels like there should be a way to handle this gracefully like in Solidity's Java style class instantiation.

– Rob
3 hours ago





It appears like CREATE_CONTRACT { storage 'g ; parameter 'p ; code ... } would work, but this will bloat the size of a contract a bit, and it feels like there should be a way to handle this gracefully like in Solidity's Java style class instantiation.

– Rob
3 hours ago













If not, a clean example in Michelson would be nice.

– Rob
3 hours ago







If not, a clean example in Michelson would be nice.

– Rob
3 hours ago















ok cool, probably a ways out then.

– Rob
3 hours ago





ok cool, probably a ways out then.

– Rob
3 hours ago




1




1





I put a comment that I deleted to convert it into an answer. I missed your comment that was added afterwards. My apologies for this.

– FFF
3 hours ago





I put a comment that I deleted to convert it into an answer. I missed your comment that was added afterwards. My apologies for this.

– FFF
3 hours ago










1 Answer
1






active

oldest

votes


















2














There is a very succinct discussion in the announcement for SmartPy https://medium.com/@SmartPy_io/introducing-smartpy-and-smartpy-io-d4013bee7d4e#15ee.



The idea is to have a contract that holds a big_map and each element of the big_map represents a contract.



This is absolutely not restricted to SmartPy and it is directly doable in Michelson, Liquidity or Fi.



This subject also appeared here:
What is the BigMap container and why does it matter?






share|improve this answer

























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    1 Answer
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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    There is a very succinct discussion in the announcement for SmartPy https://medium.com/@SmartPy_io/introducing-smartpy-and-smartpy-io-d4013bee7d4e#15ee.



    The idea is to have a contract that holds a big_map and each element of the big_map represents a contract.



    This is absolutely not restricted to SmartPy and it is directly doable in Michelson, Liquidity or Fi.



    This subject also appeared here:
    What is the BigMap container and why does it matter?






    share|improve this answer






























      2














      There is a very succinct discussion in the announcement for SmartPy https://medium.com/@SmartPy_io/introducing-smartpy-and-smartpy-io-d4013bee7d4e#15ee.



      The idea is to have a contract that holds a big_map and each element of the big_map represents a contract.



      This is absolutely not restricted to SmartPy and it is directly doable in Michelson, Liquidity or Fi.



      This subject also appeared here:
      What is the BigMap container and why does it matter?






      share|improve this answer




























        2












        2








        2







        There is a very succinct discussion in the announcement for SmartPy https://medium.com/@SmartPy_io/introducing-smartpy-and-smartpy-io-d4013bee7d4e#15ee.



        The idea is to have a contract that holds a big_map and each element of the big_map represents a contract.



        This is absolutely not restricted to SmartPy and it is directly doable in Michelson, Liquidity or Fi.



        This subject also appeared here:
        What is the BigMap container and why does it matter?






        share|improve this answer















        There is a very succinct discussion in the announcement for SmartPy https://medium.com/@SmartPy_io/introducing-smartpy-and-smartpy-io-d4013bee7d4e#15ee.



        The idea is to have a contract that holds a big_map and each element of the big_map represents a contract.



        This is absolutely not restricted to SmartPy and it is directly doable in Michelson, Liquidity or Fi.



        This subject also appeared here:
        What is the BigMap container and why does it matter?







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited 3 hours ago

























        answered 3 hours ago









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