get token balance from another contract

Question

How do we accomplish this on EOSIO?

In Ethereum we get the reference of another contract using the contract address, what about for EOSIO?

Can anyone provide a sample code for this?

Would like to pull the balance from another smart contract.

Answer 1

Declare the following struct in your contract

struct account {
        asset    balance;
        uint64_t primary_key()const { return balance.symbol.name(); }
     };

typedef eosio::multi_index<N(accounts), account> accounts;

Write the following in one of the action of contract. It is reading the accounts table of eosio.token contract and printing the balance of "user111"

symbol_type symbol(S(4,SYS));
accounts fromAcc(N(eosio.token),N(user111));
const auto& myAcc = fromAcc.get(symbol.name());
myAcc.balance.print();

Answer 2

By querying eosio.token's accounts table.

./cleos/cleos -u http://api.eosnewyork.io:80 get table eosio.token <account-name> accounts

BTW, this returns [] if the account is never transferred any token (like EOS).

Use userres table to get account info.

./cleos/cleos -u http://api.eosnewyork.io:80 get table eosio <account-name> userres