How to keep escrow of fa in contract?

[ajaythxkur]

How can we keep escrow of fa in such a way that one user deposits it and other user can withdraw that to its own account

[0xaptosj]

You can create an object (akin to a contract account in evm) and let it escrow FA.

struct FAEscrow has key {
    // the FA you want to escrow
    fa_metadata: Object<Metadata>,
    // the fungible asset store that escrow the FA
    fa_store: Object<FunigbleStore>,
    // used to generate signer for the object so you can transfer FA out\
    extend_ref: ExtendRef
}

[ajaythxkur]

@0xaptosj I tried the same thing here, please check this out
https://github.com/ajaythxkur/move-by-examples/blob/main/aptos-escrow/sources/aptos_escrow.move

[0xaptosj]

i looked at it briefly and it looks correct, nit suggestion: i think it's better to only have 1 fa per escrow, i.e. remove fa_b

[ajaythxkur]

issue was something else. the answer above is correct

[0xaptosj]

can you describe the issue? or paste the error

[ajaythxkur]

So the problem was here
let fa_b = fungible_asset::withdraw(user, metadata_b, receive);
it was giving NOT STORE OWNER error.
Fix:
let fa_b = primary_fungible_store::withdraw(user, metadata_b, receive);