95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
package store
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import (
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"context"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/actors"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/chain/vm"
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"golang.org/x/xerrors"
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"math/big"
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)
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var zero = types.NewInt(0)
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func (cs *ChainStore) Weight(ctx context.Context, ts *types.TipSet) (types.BigInt, error) {
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if ts == nil {
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return types.NewInt(0), nil
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}
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// >>> w[r] <<< + wFunction(totalPowerAtTipset(ts)) * 2^8 + (wFunction(totalPowerAtTipset(ts)) * len(ts.blocks) * wRatio_num * 2^8) / (e * wRatio_den)
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var out = new(big.Int).Set(ts.Blocks()[0].ParentWeight.Int)
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// >>> wFunction(totalPowerAtTipset(ts)) * 2^8 <<< + (wFunction(totalPowerAtTipset(ts)) * len(ts.blocks) * wRatio_num * 2^8) / (e * wRatio_den)
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ret, err := cs.call(ctx, &types.Message{
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From: actors.StorageMarketAddress,
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To: actors.StorageMarketAddress,
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Method: actors.SPAMethods.GetTotalStorage,
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}, ts)
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if err != nil {
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return types.EmptyInt, xerrors.Errorf("failed to get total power from chain: %w", err)
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}
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if ret.ExitCode != 0 {
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return types.EmptyInt, xerrors.Errorf("failed to get total power from chain (exit code %d)", ret.ExitCode)
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}
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log2P := int64(0)
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tpow := types.BigFromBytes(ret.Return)
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if tpow.GreaterThan(zero) {
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log2P = int64(tpow.BitLen() - 1)
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}
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out.Add(out, big.NewInt(log2P*256))
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// (wFunction(totalPowerAtTipset(ts)) * len(ts.blocks) * wRatio_num * 2^8) / (e * wRatio_den)
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wRatioNum := int64(1)
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wRatioDen := 2
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eWeight := big.NewInt((log2P * int64(len(ts.Blocks())) * wRatioNum) << 8)
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eWeight.Div(eWeight, big.NewInt(int64(build.BlocksPerEpoch*wRatioDen)))
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out.Add(out, eWeight)
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return types.BigInt{Int: out}, nil
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}
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// todo: dedupe with state manager
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func (cs *ChainStore) call(ctx context.Context, msg *types.Message, ts *types.TipSet) (*types.MessageReceipt, error) {
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bstate := ts.ParentState()
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r := NewChainRand(cs, ts.Cids(), ts.Height(), nil)
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vmi, err := vm.NewVM(bstate, ts.Height(), r, actors.NetworkAddress, cs.bs)
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if err != nil {
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return nil, xerrors.Errorf("failed to set up vm: %w", err)
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}
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if msg.GasLimit == types.EmptyInt {
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msg.GasLimit = types.NewInt(10000000000)
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}
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if msg.GasPrice == types.EmptyInt {
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msg.GasPrice = types.NewInt(0)
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}
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if msg.Value == types.EmptyInt {
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msg.Value = types.NewInt(0)
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}
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fromActor, err := vmi.StateTree().GetActor(msg.From)
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if err != nil {
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return nil, xerrors.Errorf("call raw get actor: %s", err)
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}
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msg.Nonce = fromActor.Nonce
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// TODO: maybe just use the invoker directly?
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ret, err := vmi.ApplyMessage(ctx, msg)
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if err != nil {
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return nil, xerrors.Errorf("apply message failed: %w", err)
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}
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if ret.ActorErr != nil {
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log.Warnf("chain call failed: %s", ret.ActorErr)
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}
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return &ret.MessageReceipt, nil
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}
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