syntax = "proto3";

package basicswap;

/* Step 1, seller -> network */
message OfferMessage {
    uint32 coin_from = 1;
    uint32 coin_to = 2;
    uint64 amount_from = 3;
    uint64 rate = 4;
    uint64 min_bid_amount = 5;
    uint64 time_valid = 6;
    enum LockType {
        NOT_SET = 0;
        SEQUENCE_LOCK_BLOCKS = 1;
        SEQUENCE_LOCK_TIME = 2;
        ABS_LOCK_BLOCKS = 3;
        ABS_LOCK_TIME = 4;
    }
    LockType lock_type = 7;
    uint32 lock_value = 8;
    uint32 swap_type = 9;

    /* optional */
    string proof_address = 10;
    string proof_signature = 11;
    bytes pkhash_seller = 12;
    bytes secret_hash = 13;

    uint64 fee_rate_from = 14;
    uint64 fee_rate_to = 15;
}

/* Step 2, buyer -> seller */
message BidMessage {
    bytes offer_msg_id = 1;
    uint64 time_valid = 2;          /* seconds bid is valid for */
    uint64 amount = 3;              /* amount of amount_from bid is for */

    /* optional */
    bytes pkhash_buyer = 4;         /* buyer's address to receive amount_from */
    string proof_address = 5;
    string proof_signature = 6;
}

/* Step 3, seller -> buyer */
message BidAcceptMessage {
    bytes bid_msg_id = 1;
    bytes initiate_txid = 2;
    bytes contract_script = 3;
}

message OfferRevokeMessage {
    bytes offer_msg_id = 1;
    bytes signature = 2;
}

message XmrBidMessage {
    /* MSG1L, F -> L */
    bytes offer_msg_id = 1;
    uint64 time_valid = 2;          /* seconds bid is valid for */
    uint64 amount = 3;              /* amount of amount_from bid is for */

    bytes pkaf = 4;

    bytes kbvf = 5;
    bytes kbsf_dleag = 6;

    bytes dest_af = 7;
}

message XmrSplitMessage {
    bytes msg_id = 1;
    uint32 msg_type = 2;  /* 1 XmrBid, 2 XmrBidAccept */
    uint32 sequence = 3;
    bytes dleag = 4;
}

message XmrBidAcceptMessage {
    bytes bid_msg_id = 1;

    bytes pkal = 3;

    bytes kbvl = 4;
    bytes kbsl_dleag = 5;

    /* MSG2F */
    bytes a_lock_tx = 6;
    bytes a_lock_tx_script = 7;
    bytes a_lock_refund_tx = 8;
    bytes a_lock_refund_tx_script = 9;
    bytes a_lock_refund_spend_tx = 10;
    bytes al_lock_refund_tx_sig = 11;
}

message XmrBidLockTxSigsMessage {
    /* MSG3L */
    bytes bid_msg_id = 1;

    bytes af_lock_refund_spend_tx_esig = 2;
    bytes af_lock_refund_tx_sig = 3;
}

message XmrBidLockSpendTxMessage {
    /* MSG4F */
    bytes bid_msg_id = 1;

    bytes a_lock_spend_tx = 2;
    bytes kal_sig = 3;
}

message XmrBidLockReleaseMessage {
    /* MSG5F */
    bytes bid_msg_id = 1;

    bytes al_lock_spend_tx_esig = 2;
}