From 353275575720415947f6983d4e451ce2e00bb0f2 Mon Sep 17 00:00:00 2001
From: Miguel Montes <miguel.montes@gmail.com>
Date: Mon, 18 Mar 2019 17:10:10 -0300
Subject: [PATCH] Agregado reporte de transferencias

---
 bfa_client/src/bfa/block.go         |  8 ++++
 bfa_client/src/bfa/node.go          | 12 +++++
 bfa_client/src/client/bfa_client.go | 71 +++++++++++++++++++++++++++++
 3 files changed, 91 insertions(+)

diff --git a/bfa_client/src/bfa/block.go b/bfa_client/src/bfa/block.go
index 248ebf9..3d591f5 100644
--- a/bfa_client/src/bfa/block.go
+++ b/bfa_client/src/bfa/block.go
@@ -28,6 +28,10 @@ func (bigInt *BigInt) UnmarshalJSON(b []byte) error {
 
 }
 
+func (bigInt *BigInt) String() string {
+	return (*big.Int)(bigInt).String()
+}
+
 func (bigInt *BigInt) Int64() int64 {
 	return (*big.Int)(bigInt).Int64()
 }
@@ -36,6 +40,10 @@ func (bigInt *BigInt) Uint64() uint64 {
 	return (*big.Int)(bigInt).Uint64()
 }
 
+func (bigInt *BigInt) IsZero() bool {
+	return (*big.Int)(bigInt).BitLen() == 0
+}
+
 type Uint64 uint64
 
 func (u *Uint64) UnmarshalJSON(b []byte) (err error) {
diff --git a/bfa_client/src/bfa/node.go b/bfa_client/src/bfa/node.go
index 6fc48e2..8394639 100644
--- a/bfa_client/src/bfa/node.go
+++ b/bfa_client/src/bfa/node.go
@@ -3,6 +3,7 @@ package bfa
 import (
 	. "../util"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/consensus/clique"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/rpc"
@@ -65,6 +66,11 @@ func (node *Node) BlockNumber() int64 {
 	return bn.Int64()
 }
 
+func (node *Node) GasPrice() (gp int64) {
+	node.Call(&gp, "eth_gasPrice")
+	return gp
+}
+
 func (node *Node) Accounts() (accounts []string) {
 	node.Call(&accounts, "eth_accounts")
 	return
@@ -142,6 +148,12 @@ func (node *Node) BlockByHash(hash common.Hash) (block Block) {
 	return
 }
 
+func (node *Node) BlockTransactionCount(blockNumber int64) (count int64) {
+	var num hexutil.Uint64
+	node.Call(&num, "eth_getBlockTransactionCountByNumber", hexBlockNumber(blockNumber))
+	return int64(num)
+}
+
 func (node *Node) BlockSigner(blockNumber int64) (signer common.Address) {
 	if blockNumber == 0 { // we return an empty signer for genesis block
 		return
diff --git a/bfa_client/src/client/bfa_client.go b/bfa_client/src/client/bfa_client.go
index 1eb1666..224a13f 100644
--- a/bfa_client/src/client/bfa_client.go
+++ b/bfa_client/src/client/bfa_client.go
@@ -502,6 +502,76 @@ func snapshot() {
 	util.PrintJson(snapshot)
 }
 
+func transfers() {
+	type Transfer struct {
+		From        string   `json:"from"`
+		To          string   `json:"to"`
+		Amount      *big.Int `json:"amount"`
+		BlockNumber int64    `json:"blockNumber"`
+	}
+	var (
+		first, last, end int64
+	)
+	description = "Muestra transferencias en un rango de bloques, y opcionalmente, restringidas a ciertas direcciones."
+	otherArgs = "[dirección...]"
+	setFlags()
+	flags.Int64Var(&first, "first-block", latest, "Primer bloque del rango (-1 para especificar el último bloque)")
+	flags.Int64Var(&last, "last-block", latest, "Último bloque del rango (-1 para especificar el último bloque)")
+	parseFlags(true)
+	url = updateURL(url)
+	node, err := bfa.Dial(url)
+	util.Check(err)
+	defer node.Close()
+	set := make(map[common.Address]bool)
+	txs := make([]Transfer, 0)
+	for i := 0; i < flags.NArg(); i++ {
+		address := flags.Arg(i)
+		util.Ensure(util.IsAddress(address), "'%v' no es una dirección válida", address)
+		set[common.HexToAddress(address)] = true
+	}
+	latest := node.BlockNumber()
+	if first < 0 {
+		first = latest
+	}
+	if last < 0 || last > latest {
+		end = latest + 1
+	} else {
+		end = last + 1
+	}
+	for first < end {
+		for i := first; i < end; i++ {
+			if node.BlockTransactionCount(i) > 0 {
+				block := node.BlockByNumber(i)
+				for _, transaction := range block.Transactions {
+					if !transaction.Value.IsZero() {
+						src := transaction.From
+						dst := transaction.To
+						if len(set) == 0 || set[src] || set[dst] {
+							if json {
+								txs = append(txs, Transfer{src.Hex(), dst.Hex(), (*big.Int)(transaction.Value), i})
+							} else {
+								fmt.Printf("%v -> %v: %v (%v)\n", src.Hex(), dst.Hex(), transaction.Value, transaction.BlockNumber)
+							}
+						}
+					}
+				}
+			}
+		}
+		first = end
+		if last < 0 || last > end {
+			latest = node.BlockNumber()
+			if latest < last {
+				end = latest + 1
+			} else {
+				end = last + 1
+			}
+		}
+	}
+	if json {
+		util.PrintJson(txs)
+	}
+}
+
 func main() {
 	var (
 		commands = map[string]func(){
@@ -512,6 +582,7 @@ func main() {
 			"status":    status,
 			"block":     block,
 			"snapshot":  snapshot,
+			"transfers": transfers,
 		}
 		validCommands []string
 		command       func()
-- 
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