syntax = "proto3";

package basicswap;

/* Step 1, seller -> network */
message OfferMessage {
    uint32 protocol_version = 1;
    uint32 coin_from = 2;
    uint32 coin_to = 3;
    uint64 amount_from = 4;
    uint64 amount_to = 5;
    uint64 min_bid_amount = 6;
    uint64 time_valid = 7;
    enum LockType {
        NOT_SET = 0;
        SEQUENCE_LOCK_BLOCKS = 1;
        SEQUENCE_LOCK_TIME = 2;
        ABS_LOCK_BLOCKS = 3;
        ABS_LOCK_TIME = 4;
    }
    LockType lock_type = 8;
    uint32 lock_value = 9;
    uint32 swap_type = 10;

    /* optional */
    string proof_address = 11;
    string proof_signature = 12;
    bytes pkhash_seller = 13;
    bytes secret_hash = 14;

    uint64 fee_rate_from = 15;
    uint64 fee_rate_to = 16;

    bool amount_negotiable = 17;
    bool rate_negotiable = 18;

    bytes proof_utxos = 19;          /* 32 byte txid 2 byte vout, repeated */
}

/* Step 2, buyer -> seller */
message BidMessage {
    uint32 protocol_version = 1;
    bytes offer_msg_id = 2;
    uint64 time_valid = 3;          /* seconds bid is valid for */
    uint64 amount = 4;              /* amount of amount_from bid is for */
    uint64 amount_to = 5;
    bytes pkhash_buyer = 6;         /* buyer's address to receive amount_from */
    string proof_address = 7;
    string proof_signature = 8;

    bytes proof_utxos = 9;          /* 32 byte txid 2 byte vout, repeated */

    /* optional */
    bytes pkhash_buyer_to = 13;     /* When pubkey hash is different on the to-chain */
}

/* For tests */
message BidMessage_test {
    uint32 protocol_version = 1;
    bytes offer_msg_id = 2;
    uint64 time_valid = 3;
    uint64 amount = 4;
    uint64 rate = 5;
}

/* Step 3, seller -> buyer */
message BidAcceptMessage {
    bytes bid_msg_id = 1;
    bytes initiate_txid = 2;
    bytes contract_script = 3;
    bytes pkhash_seller = 4;
}

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

message BidRejectMessage {
    bytes bid_msg_id = 1;
    uint32 reject_code = 2;
}

message XmrBidMessage {
    /* MSG1L, F -> L */
    uint32 protocol_version = 1;
    bytes offer_msg_id = 2;
    uint64 time_valid = 3;          /* seconds bid is valid for */
    uint64 amount = 4;              /* amount of amount_from bid is for */
    uint64 amount_to = 5;

    bytes pkaf = 6;

    bytes kbvf = 7;
    bytes kbsf_dleag = 8;

    bytes dest_af = 9;
}

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 = 2;
    bytes kbvl = 3;
    bytes kbsl_dleag = 4;

    /* MSG2F */
    bytes a_lock_tx = 5;
    bytes a_lock_tx_script = 6;
    bytes a_lock_refund_tx = 7;
    bytes a_lock_refund_tx_script = 8;
    bytes a_lock_refund_spend_tx = 9;
    bytes al_lock_refund_tx_sig = 10;
}

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;
}

message ADSBidIntentMessage {
    /* L -> F Sent from bidder, construct a reverse bid */
    uint32 protocol_version = 1;
    bytes offer_msg_id = 2;
    uint64 time_valid = 3;          /* seconds bid is valid for */
    uint64 amount_from = 4;         /* amount of offer.coin_from bid is for */
    uint64 amount_to = 5;           /* amount of offer.coin_to bid is for, equivalent to bid.amount */
}

message ADSBidIntentAcceptMessage {
    /* F -> L Sent from offerer, construct a reverse bid */
    bytes bid_msg_id = 1;

    bytes pkaf = 2;
    bytes kbvf = 3;
    bytes kbsf_dleag = 4;
    bytes dest_af = 5;
}