118 lines
3.6 KiB
Go
118 lines
3.6 KiB
Go
package keeper
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"strings"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/skip-mev/pob/x/builder/types"
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)
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var _ types.MsgServer = MsgServer{}
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// MsgServer is the wrapper for the builder module's msg service.
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type MsgServer struct {
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Keeper
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}
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// NewMsgServerImpl returns an implementation of the builder MsgServer interface.
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func NewMsgServerImpl(keeper Keeper) *MsgServer {
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return &MsgServer{Keeper: keeper}
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}
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func (m MsgServer) AuctionBid(goCtx context.Context, msg *types.MsgAuctionBid) (*types.MsgAuctionBidResponse, error) {
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ctx := sdk.UnwrapSDKContext(goCtx)
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// This should never return an error because the address was validated when
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// the message was ingressed.
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bidder, err := sdk.AccAddressFromBech32(msg.Bidder)
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if err != nil {
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return nil, err
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}
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// Ensure that the number of transactions is less than or equal to the maximum
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// allowed.
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maxBundleSize, err := m.GetMaxBundleSize(ctx)
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if err != nil {
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return nil, err
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}
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if uint32(len(msg.Transactions)) > maxBundleSize {
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return nil, fmt.Errorf("the number of transactions in the bid is greater than the maximum allowed; expected <= %d, got %d", maxBundleSize, len(msg.Transactions))
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}
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proposerFee, err := m.GetProposerFee(ctx)
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if err != nil {
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return nil, err
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}
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escrow, err := m.Keeper.GetEscrowAccount(ctx)
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if err != nil {
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return nil, err
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}
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var proposerReward sdk.Coins
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if proposerFee.IsZero() {
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// send the entire bid to the escrow account when no proposer fee is set
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if err := m.bankKeeper.SendCoins(ctx, bidder, escrow, sdk.NewCoins(msg.Bid)); err != nil {
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return nil, err
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}
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} else {
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prevPropConsAddr := m.distrKeeper.GetPreviousProposerConsAddr(ctx)
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prevProposer := m.stakingKeeper.ValidatorByConsAddr(ctx, prevPropConsAddr)
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// determine the amount of the bid that goes to the (previous) proposer
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bid := sdk.NewDecCoinsFromCoins(msg.Bid)
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proposerReward, _ = bid.MulDecTruncate(proposerFee).TruncateDecimal()
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if err := m.bankKeeper.SendCoins(ctx, bidder, sdk.AccAddress(prevProposer.GetOperator()), proposerReward); err != nil {
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return nil, err
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}
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// Determine the amount of the remaining bid that goes to the escrow account.
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// If a decimal remainder exists, it'll stay with the bidding account.
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escrowTotal := bid.Sub(sdk.NewDecCoinsFromCoins(proposerReward...))
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escrowReward, _ := escrowTotal.TruncateDecimal()
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if err := m.bankKeeper.SendCoins(ctx, bidder, escrow, escrowReward); err != nil {
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return nil, err
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}
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}
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bundledTxHashes := make([]string, len(msg.Transactions))
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for i, refTxRaw := range msg.Transactions {
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hash := sha256.Sum256(refTxRaw)
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bundledTxHashes[i] = hex.EncodeToString(hash[:])
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}
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ctx.EventManager().EmitEvent(
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sdk.NewEvent(
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types.EventTypeAuctionBid,
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sdk.NewAttribute(types.EventAttrBidder, msg.Bidder),
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sdk.NewAttribute(types.EventAttrBid, msg.Bid.String()),
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sdk.NewAttribute(types.EventAttrProposerReward, proposerReward.String()),
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sdk.NewAttribute(types.EventAttrBundledTxs, strings.Join(bundledTxHashes, ",")),
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),
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)
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return &types.MsgAuctionBidResponse{}, nil
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}
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func (m MsgServer) UpdateParams(goCtx context.Context, msg *types.MsgUpdateParams) (*types.MsgUpdateParamsResponse, error) {
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ctx := sdk.UnwrapSDKContext(goCtx)
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// ensure that the message signer is the authority
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if msg.Authority != m.Keeper.GetAuthority() {
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return nil, fmt.Errorf("this message can only be executed by the authority; expected %s, got %s", m.Keeper.GetAuthority(), msg.Authority)
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}
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if err := m.Keeper.SetParams(ctx, msg.Params); err != nil {
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return nil, err
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}
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return &types.MsgUpdateParamsResponse{}, nil
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}
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