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Version: 20.1.0

MANAGER_LAMBDA

The MANAGER_LAMBDA is an object exported from the @taquito/taquito package that provides a convenient way to create lambda functions in Michelson to interact with the manager contract, a multisig contract.

The object exposes 4 methods that take different parameters in order to create the corresponding lambda under the hood, so that developers don't have to tinker with Michelson code.

The methods are the following:

  • removeDelegate: to remove the current baker to whom the balance of the multisig contract has been delegated
  • setDelegate: to set a new baker as delegate
  • transferImplicit: to transfer a given amount of XTZ to a given implicit account
  • transferToContract: to transfer a given amount of XTZ to a given contract

The removeDelegate method​

The method:

MANAGER_LAMBDA.removeDelegate();

The Michelson output:

DROP ;
NIL operation
NONE key_hash ;
SET_DELEGATE ;
CONS ;

The method doesn't take any parameter.

It produces a list of operations with a single operation in it created by the SET_DELEGATE instruction with a value of None, which removes the current delegate for the contract.

The setDelegate method​

The method:

MANAGER_LAMBDA.setDelegate(key: string)

The Michelson output:

DROP ;
NIL operation ;
PUSH key_hash <baker-key_hash> ;
SOME ;
SET_DELEGATE ;
CONS ;

The method takes 1 parameter of type string whose value is the key_hash of the baker address.

It produces a list of operations with a single operation in it created by the SET_DELEGATE instruction with a value of Some <baker-key_hash> where the <baker-key_hash> is replaced with the provided string.

The transferImplicit method​

The method:

MANAGER_LAMBDA.transferImplicit(key: string, mutez: number)

The Michelson output:

DROP ;
NIL operation ;
PUSH key_hash <recipient-address> ;
IMPLICIT_ACCOUNT ;
PUSH mutez <amount-to-transfer> ;
UNIT ;
TRANSFER_TOKENS ;
CONS ;

The method takes 2 parameters: the first one of type string whose value is the key_hash of the recipient address, the second one of type number whose value is the amount of XTZ to be transferred.

It produces a list of operations with a single operation in it created by the TRANSFER_TOKENS instruction that will transfer the provided amount of XTZ to the provided address.

The transferToContract method​

The method:

MANAGER_LAMBDA.transferToContract(key: string, amount: number)

The Michelson output:

DROP ;
NIL operation ;
PUSH address <contract-address> ;
CONTRACT unit ;
IF_NONE
    {
        UNIT ;
        FAILWITH ;
    }
    {
        PUSH mutez <amount-to-transfer> ;
        UNIT ;
        TRANSFER_TOKENS ;
        CONS ;
    }

The method takes 2 parameters: the first one of type string whose value is the key_hash of the recipient address, the second one of type number whose value is the amount of XTZ to be transferred.

It produces a list of operations with a single operation in it created by the TRANSFER_TOKENS instruction that will transfer the provided amount of XTZ to the provided contract address. The contract must take a parameter of type unit (which is the case for the manager contract), this condition is verified by the Michelson code in the lambda.

Information​

Link to the MANAGER_LAMBDA code

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