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E0055: Reserved ABI name

Token is a built-in ABI provided by the compiler (it declares attach and detach for token definitions). User code may not declare an abi with that name.

Example (error)​

abi Token {
    fn attach(to: Utxo);
}

Fix​

Choose a different ABI name:

abi MyTokenAbi {
    fn attach(to: Utxo);
}