rpc `GetWallet`

`participant.v1.WalletRequest`

Gets an existing wallet.

Field	Type	Description
public_key	string	Public key of the wallet

Field	Type	Description
name	string	Human friendly name of the wallet.
public_key	string	Public key of the wallet.
metadata `optional`	Value	User-defined metadata associated with the wallet.
external_id `optional`	string	Queryable ID used by external systems

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