transfer

params of transferParams -> (list(op), storage upd)

Implementation of FA2 interface method, more info about FA2 transfer you can read in the link below.

proposals/tzip-12/tzip-12.md · master · Tezos / tzipGitLab

TZIP-12: FA2 - Multi-Asset Interface

Types

yToken/fa2Types.ligo

type tokenId is nat

type transferDestination is [@layout:comb] record [
  to_                   : address;
  token_id              : tokenId;
  amount                : nat;
]

type transferParam is [@layout:comb] record [
  from_                 : address;
  txs                   : list(transferDestination);
]

type transferParams is list(transferParam)

Parameter	Type	Description
from_	address	account transfer tokens from
amount	nat	amount of tokens
to_	address	account transfer tokens to
token_id	nat	token identifier

Usage

🌮 Taquito

const tokenId = 0; // or new BigNumber(0) or "0"
const alice = "tz1..."
const bob = "tz2..."
const yupana = await tezos.contract.at(yTokenAddress);
const operation = await yupana.methods.transfer([
        {
          from_: alice,
          txs: [
            { to_: bob, token_id: tokenId, amount: 0 },
            { to_: alice, token_id: tokenId, amount: 6_000 },
          ],
        },
      ]).send();
await operation.confirmation();

🐍 Pytezos

token_id = 0
alice = "tz1..."
bob = "tz2..."
yupana = ContractInterface.from_michelson(code) # or client.contract(contract_address)...
call = yupana.transfer([{ "from_" : alice,
        "txs" : [
            {
                "amount": 0,
                "to_": bob,
                "token_id": token_id
            },
            {
                "amount": 6_000,
                "to_": alice,
                "token_id": token_id
            }
        ]
    }])
opg = call.inject()

Errors

• FA2_NOT_OPERATOR - sender is not operator of from_ account.

• yToken/token-taken-as-collateral - when user entered market (enterMarket) for this token.

• FA2_TOKEN_UNDEFINED - token identifier is not assigned to any known tokens.

• FA2_INSUFFICIENT_BALANCE - when transfer amount greater than account from_ balance (also underflow/srcBalance make the same check but underflow is unreachable)