From fbe206f84387db4e5cdf46c7a7b4b25c46495666 Mon Sep 17 00:00:00 2001
From: whyrusleeping <why@ipfs.io>
Date: Fri, 7 Aug 2020 12:57:03 -0700
Subject: [PATCH] add command to view circulating supply

---
 api/api_full.go         |  3 +++
 api/apistruct/struct.go |  5 +++++
 chain/stmgr/utils.go    | 27 +++++++++++++++++++++++++++
 cli/state.go            | 29 +++++++++++++++++++++++++++++
 node/impl/full/state.go |  9 +++++++++
 5 files changed, 73 insertions(+)

diff --git a/api/api_full.go b/api/api_full.go
index a8176559d..1a3850cc6 100644
--- a/api/api_full.go
+++ b/api/api_full.go
@@ -351,6 +351,9 @@ type FullNode interface {
 	// can issue. It takes the deal size and verified status as parameters.
 	StateDealProviderCollateralBounds(context.Context, abi.PaddedPieceSize, bool, types.TipSetKey) (DealCollateralBounds, error)
 
+	// StateCirculatingSupply returns the circulating supply of Filecoin at the given tipset
+	StateCirculatingSupply(context.Context, types.TipSetKey) (abi.TokenAmount, error)
+
 	// MethodGroup: Msig
 	// The Msig methods are used to interact with multisig wallets on the
 	// filecoin network
diff --git a/api/apistruct/struct.go b/api/apistruct/struct.go
index 9b888335e..bc3b72a17 100644
--- a/api/apistruct/struct.go
+++ b/api/apistruct/struct.go
@@ -177,6 +177,7 @@ type FullNodeStruct struct {
 		StateCompute                       func(context.Context, abi.ChainEpoch, []*types.Message, types.TipSetKey) (*api.ComputeStateOutput, error)           `perm:"read"`
 		StateVerifiedClientStatus          func(context.Context, address.Address, types.TipSetKey) (*verifreg.DataCap, error)                                  `perm:"read"`
 		StateDealProviderCollateralBounds  func(context.Context, abi.PaddedPieceSize, bool, types.TipSetKey) (api.DealCollateralBounds, error)                 `perm:"read"`
+		StateCirculatingSupply             func(context.Context, types.TipSetKey) (abi.TokenAmount, error)                                                     `perm:"read"`
 
 		MsigGetAvailableBalance func(context.Context, address.Address, types.TipSetKey) (types.BigInt, error)                                                                    `perm:"read"`
 		MsigCreate              func(context.Context, uint64, []address.Address, abi.ChainEpoch, types.BigInt, address.Address, types.BigInt) (cid.Cid, error)                   `perm:"sign"`
@@ -791,6 +792,10 @@ func (c *FullNodeStruct) StateDealProviderCollateralBounds(ctx context.Context,
 	return c.Internal.StateDealProviderCollateralBounds(ctx, size, verified, tsk)
 }
 
+func (c *FullNodeStruct) StateCirculatingSupply(ctx context.Context, tsk types.TipSetKey) (abi.TokenAmount, error) {
+	return c.Internal.StateCirculatingSupply(ctx, tsk)
+}
+
 func (c *FullNodeStruct) MsigGetAvailableBalance(ctx context.Context, a address.Address, tsk types.TipSetKey) (types.BigInt, error) {
 	return c.Internal.MsigGetAvailableBalance(ctx, a, tsk)
 }
diff --git a/chain/stmgr/utils.go b/chain/stmgr/utils.go
index d1ad13420..6806ae021 100644
--- a/chain/stmgr/utils.go
+++ b/chain/stmgr/utils.go
@@ -693,3 +693,30 @@ func MinerHasMinPower(ctx context.Context, sm *StateManager, addr address.Addres
 
 	return ps.MinerNominalPowerMeetsConsensusMinimum(sm.ChainStore().Store(ctx), addr)
 }
+
+func GetCirculatingSupply(ctx context.Context, sm *StateManager, ts *types.TipSet) (abi.TokenAmount, error) {
+	if ts == nil {
+		ts = sm.cs.GetHeaviestTipSet()
+	}
+
+	r := store.NewChainRand(sm.cs, ts.Cids(), ts.Height())
+	vmopt := &vm.VMOpts{
+		StateBase:  ts.ParentState(),
+		Epoch:      ts.Height(),
+		Rand:       r,
+		Bstore:     sm.cs.Blockstore(),
+		Syscalls:   sm.cs.VMSys(),
+		VestedCalc: sm.GetVestedFunds,
+		BaseFee:    ts.Blocks()[0].ParentBaseFee,
+	}
+	vmi, err := vm.NewVM(vmopt)
+	if err != nil {
+		return abi.NewTokenAmount(0), err
+	}
+
+	uvm := &vm.UnsafeVM{vmi}
+
+	rt := uvm.MakeRuntime(ctx, &types.Message{From: builtin.InitActorAddr, GasLimit: 10000000}, builtin.InitActorAddr, 0, 0, 0)
+
+	return rt.TotalFilCircSupply(), nil
+}
diff --git a/cli/state.go b/cli/state.go
index 5f6400554..3072d4c01 100644
--- a/cli/state.go
+++ b/cli/state.go
@@ -55,6 +55,7 @@ var stateCmd = &cli.Command{
 		statePledgeCollateralCmd,
 		stateListActorsCmd,
 		stateListMinersCmd,
+		stateCircSupplyCmd,
 		stateGetActorCmd,
 		stateLookupIDCmd,
 		stateReplaySetCmd,
@@ -1518,3 +1519,31 @@ func parseParamsForMethod(act cid.Cid, method uint64, args []string) ([]byte, er
 	}
 	return buf.Bytes(), nil
 }
+
+var stateCircSupplyCmd = &cli.Command{
+	Name:  "circulating-supply",
+	Usage: "Get the current circulating supply of filecoin",
+	Action: func(cctx *cli.Context) error {
+		api, closer, err := GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer closer()
+
+		ctx := ReqContext(cctx)
+
+		ts, err := LoadTipSet(ctx, cctx, api)
+		if err != nil {
+			return err
+		}
+
+		circ, err := api.StateCirculatingSupply(ctx, ts.Key())
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(types.FIL(circ))
+
+		return nil
+	},
+}
diff --git a/node/impl/full/state.go b/node/impl/full/state.go
index ff8d9def1..5495581f1 100644
--- a/node/impl/full/state.go
+++ b/node/impl/full/state.go
@@ -1184,3 +1184,12 @@ func (a *StateAPI) StateDealProviderCollateralBounds(ctx context.Context, size a
 		Max: max,
 	}, nil
 }
+
+func (a *StateAPI) StateCirculatingSupply(ctx context.Context, tsk types.TipSetKey) (abi.TokenAmount, error) {
+	ts, err := a.Chain.GetTipSetFromKey(tsk)
+	if err != nil {
+		return abi.TokenAmount{}, xerrors.Errorf("loading tipset %s: %w", tsk, err)
+	}
+
+	return stmgr.GetCirculatingSupply(ctx, a.StateManager, ts)
+}