mirror of
https://github.com/AthanorLabs/atomic-swap.git
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67 lines
1.7 KiB
Go
67 lines
1.7 KiB
Go
// Copyright 2023 Athanor Labs (ON)
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// SPDX-License-Identifier: LGPL-3.0-only
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// Package relayer provides libraries for creating and validating relay requests and responses.
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package relayer
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import (
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"context"
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"crypto/ecdsa"
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"math/big"
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ethcommon "github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/ethclient"
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logging "github.com/ipfs/go-log"
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"github.com/athanorlabs/atomic-swap/coins"
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contracts "github.com/athanorlabs/atomic-swap/ethereum"
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"github.com/athanorlabs/atomic-swap/net/message"
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)
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const (
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relayedClaimGas = 70000 // worst case gas usage for the claimRelayer swapFactory call
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forwarderClaimGas = 156000 // worst case gas usage when using forwarder to claim
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)
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// FeeWei and FeeEth are the fixed 0.009 ETH fee for using a swap relayer to claim.
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var (
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FeeWei = big.NewInt(9e15)
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FeeEth = coins.NewWeiAmount(FeeWei).AsEther()
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)
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var log = logging.Logger("relayer")
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// CreateRelayClaimRequest fills and returns a RelayClaimRequest ready for
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// submission to a relayer.
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func CreateRelayClaimRequest(
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ctx context.Context,
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claimerEthKey *ecdsa.PrivateKey,
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ec *ethclient.Client,
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swapCreatorAddr ethcommon.Address,
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forwarderAddr ethcommon.Address,
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swap *contracts.SwapCreatorSwap,
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secret *[32]byte,
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) (*message.RelayClaimRequest, error) {
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signature, err := createForwarderSignature(
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ctx,
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claimerEthKey,
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ec,
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swapCreatorAddr,
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forwarderAddr,
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swap,
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secret,
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)
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if err != nil {
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return nil, err
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}
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return &message.RelayClaimRequest{
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OfferID: nil, // set elsewhere if sending to counterparty
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SwapCreatorAddr: swapCreatorAddr,
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Swap: swap,
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Secret: secret[:],
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Signature: signature,
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}, nil
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}
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