lotus/chain/vm/vmi.go

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package vm
import (
"context"
"os"
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cid "github.com/ipfs/go-cid"
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"github.com/filecoin-project/go-state-types/network"
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"github.com/filecoin-project/lotus/chain/types"
)
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// stat counters
var (
StatSends uint64
StatApplied uint64
)
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type Interface interface {
// Applies the given message onto the VM's current state, returning the result of the execution
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ApplyMessage(ctx context.Context, cmsg types.ChainMsg) (*ApplyRet, error)
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// Same as above but for system messages (the Cron invocation and block reward payments).
// Must NEVER fail.
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ApplyImplicitMessage(ctx context.Context, msg *types.Message) (*ApplyRet, error)
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// Flush all buffered objects into the state store provided to the VM at construction.
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Flush(ctx context.Context) (cid.Cid, error)
}
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// WARNING: You will not affect your node's execution by misusing this feature, but you will confuse yourself thoroughly!
// An envvar that allows the user to specify debug actors bundles to be used by the FVM
// alongside regular execution. This is basically only to be used to print out specific logging information.
// Message failures, unexpected terminations,gas costs, etc. should all be ignored.
var useFvmDebug = os.Getenv("LOTUS_FVM_DEVELOPER_DEBUG") == "1"
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func NewVM(ctx context.Context, opts *VMOpts) (Interface, error) {
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if opts.NetworkVersion >= network.Version16 {
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if useFvmDebug {
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return NewDualExecutionFVM(ctx, opts)
}
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return NewFVM(ctx, opts)
}
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return NewLegacyVM(ctx, opts)
}