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In ink! smart contract, we usually use AccountID and save the balances in array using mapping or HashMap. This is the traditional way of ERC20 smart contract.

I am now developing on my local chain, and main token is MMM.

What I want is to transfer our own token (MMM) via smart contract, not deployed token.

Is my idea correct? and can anyone help me?

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If I understand your question correctly, you want to invoke a function in your smart contract that transfers your native chain token to another account.

In ink! there is the function ink_env::transfer to do this.

You can take a look at the give_me function in our contract-transfer example, it does exactly this plus some error handling around it.

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  • How would you transfer the native chain token from one account to another? I can't find any example for that online, and the example you provided only shows how to transfer a native token from the contract to the caller.
    – rajohs
    Sep 12, 2022 at 16:10
  • I know this is old, but for others who bump into this, I think what you were looking at was this: github.com/paritytech/ink-examples/blob/… May 3, 2023 at 16:19

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