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use ::strkey::StrKey;
use ::amount::Amount;
use ::asset::Asset;


pub enum Operation {
    CreateAccount {
        source: Option<StrKey>,
        destination: StrKey,
        amount: Amount,
    },
    Payment {
        source: Option<StrKey>,
        destination: StrKey,
        asset: Asset,
        amount: Amount,
    },
    PathPayment { source: Option<StrKey> },
    ManageOffer { source: Option<StrKey> },
    CreatePassiveOffer { source: Option<StrKey> },
    SetOptions { source: Option<StrKey> },
    ChangeTrust { source: Option<StrKey> },
    AllowTrust { source: Option<StrKey> },
    AccountMerge {
        source: Option<StrKey>,
        destination: StrKey,
    },
    Inflation { source: Option<StrKey> },
    ManageData { source: Option<StrKey> },
}


impl Operation {
    pub fn create_account(destination: StrKey, amount: Amount) -> Operation {
        Operation::CreateAccount {
            source: None,
            destination: destination,
            amount: amount,
        }
    }

    pub fn create_account_with_source(source: StrKey,
                                      destination: StrKey,
                                      amount: Amount)
                                      -> Operation {
        Operation::CreateAccount {
            source: Some(source),
            destination: destination,
            amount: amount,
        }
    }

    pub fn payment(destination: StrKey, asset: Asset, amount: Amount) -> Operation {
        Operation::Payment {
            source: None,
            destination: destination,
            asset: asset,
            amount: amount,
        }
    }

    pub fn payment_with_source(source: StrKey,
                               destination: StrKey,
                               asset: Asset,
                               amount: Amount)
                               -> Operation {
        Operation::Payment {
            source: Some(source),
            destination: destination,
            asset: asset,
            amount: amount,
        }
    }

    pub fn inflation() -> Operation {
        Operation::Inflation { source: None }
    }

    pub fn inflation_with_source(source: StrKey) -> Operation {
        Operation::Inflation { source: Some(source) }
    }
}