From d3e86f9208d775ee8020d5583d0aac8f3cfb52b2 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Wed, 1 Apr 2015 10:51:46 +0200
Subject: Added gas generator defaults
---
generators/default.json | 56 ++++++++++++++++++++++++++++++++++++++++++++
generators/defaults.go | 62 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 118 insertions(+)
create mode 100644 generators/default.json
create mode 100644 generators/defaults.go
(limited to 'generators')
diff --git a/generators/default.json b/generators/default.json
new file mode 100644
index 000000000..181a9dd54
--- /dev/null
+++ b/generators/default.json
@@ -0,0 +1,56 @@
+{
+ "genesisGasLimit": { "v": 1000000, "d": "Gas limit of the Genesis block." },
+ "minGasLimit": { "v": 125000, "d": "Minimum the gas limit may ever be." },
+ "gasLimitBoundDivisor": { "v": 1024, "d": "The bound divisor of the gas limit, used in update calculations." },
+ "genesisDifficulty": { "v": 131072, "d": "Difficulty of the Genesis block." },
+ "minimumDifficulty": { "v": 131072, "d": "The minimum that the difficulty may ever be." },
+ "difficultyBoundDivisor": { "v": 2048, "d": "The bound divisor of the difficulty, used in the update calculations." },
+ "durationLimit": { "v": 8, "d": "The decision boundary on the blocktime duration used to determine whether difficulty should go up or not." },
+ "maximumExtraDataSize": { "v": 1024, "d": "Maximum size extra data may be after Genesis." },
+ "epochDuration": { "v": 30000, "d": "Duration between proof-of-work epochs." },
+ "stackLimit": { "v": 1024, "d": "Maximum size of VM stack allowed." },
+
+ "tierStepGas": { "v": [ 0, 2, 3, 5, 8, 10, 20 ], "d": "Once per operation, for a selection of them." },
+ "expGas": { "v": 10, "d": "Once per EXP instuction." },
+ "expByteGas": { "v": 10, "d": "Times ceil(log256(exponent)) for the EXP instruction." },
+
+ "sha3Gas": { "v": 30, "d": "Once per SHA3 operation." },
+ "sha3WordGas": { "v": 6, "d": "Once per word of the SHA3 operation's data." },
+
+ "sloadGas": { "v": 50, "d": "Multiplied by the number of 32-byte words that are copied (round up) for any *COPY operation and added." },
+ "sstoreSetGas": { "v": 20000, "d": "Once per SLOAD operation." },
+ "sstoreResetGas": { "v": 5000, "d": "Once per SSTORE operation if the zeroness changes from zero." },
+ "sstoreClearGas": { "v": 5000, "d": "Once per SSTORE operation if the zeroness doesn't change." },
+ "sstoreRefundGas": { "v": 15000, "d": "Once per SSTORE operation if the zeroness changes to zero." },
+ "jumpdestGas": { "v": 1, "d": "Refunded gas, once per SSTORE operation if the zeroness changes to zero." },
+
+ "logGas": { "v": 375, "d": "Per LOG* operation." },
+ "logDataGas": { "v": 8, "d": "Per byte in a LOG* operation's data." },
+ "logTopicGas": { "v": 375, "d": "Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas." },
+
+ "createGas": { "v": 32000, "d": "Once per CREATE operation & contract-creation transaction." },
+
+ "callGas": { "v": 40, "d": "Once per CALL operation & message call transaction." },
+ "callStipend": { "v": 2300, "d": "Free gas given at beginning of call." },
+ "callValueTransferGas": { "v": 9000, "d": "Paid for CALL when the value transfor is non-zero." },
+ "callNewAccountGas": { "v": 25000, "d": "Paid for CALL when the destination address didn't exist prior." },
+
+ "suicideRefundGas": { "v": 24000, "d": "Refunded following a suicide operation." },
+ "memoryGas": { "v": 3, "d": "Times the address of the (highest referenced byte in memory + 1). NOTE: referencing happens on read, write and in instructions such as RETURN and CALL." },
+ "quadCoeffDiv": { "v": 512, "d": "Divisor for the quadratic particle of the memory cost equation." },
+
+ "createDataGas": { "v": 200, "d": "" },
+ "txGas": { "v": 21000, "d": "Per transaction. NOTE: Not payable on data of calls between transactions." },
+ "txDataZeroGas": { "v": 4, "d": "Per byte of data attached to a transaction that equals zero. NOTE: Not payable on data of calls between transactions." },
+ "txDataNonZeroGas": { "v": 68, "d": "Per byte of data attached to a transaction that is not equal to zero. NOTE: Not payable on data of calls between transactions." },
+
+ "copyGas": { "v": 3, "d": "" },
+
+ "ecrecoverGas": { "v": 3000, "d": "" },
+ "sha256Gas": { "v": 60, "d": "" },
+ "sha256WordGas": { "v": 12, "d": "" },
+ "ripemd160Gas": { "v": 600, "d": "" },
+ "ripemd160WordGas": { "v": 120, "d": "" },
+ "identityGas": { "v": 15, "d": "" },
+ "identityWordGas": { "v": 3, "d": ""}
+}
diff --git a/generators/defaults.go b/generators/defaults.go
new file mode 100644
index 000000000..b0c71111c
--- /dev/null
+++ b/generators/defaults.go
@@ -0,0 +1,62 @@
+//go:generate go run defaults.go default.json defs.go
+
+package main //build !none
+
+import (
+ "encoding/json"
+ "fmt"
+ "io/ioutil"
+ "os"
+ "os/exec"
+ "path"
+ "strings"
+)
+
+func fatal(str string, v ...interface{}) {
+ fmt.Fprintf(os.Stderr, str, v...)
+ os.Exit(1)
+}
+
+type setting struct {
+ Value int64 `json:"v"`
+ Comment string `json:"d"`
+}
+
+func main() {
+ if len(os.Args) < 3 {
+ fatal("usage %s <input> <output>\n", os.Args[0])
+ }
+
+ content, err := ioutil.ReadFile(os.Args[1])
+ if err != nil {
+ fatal("error reading file %v\n", err)
+ }
+
+ m := make(map[string]setting)
+ json.Unmarshal(content, &m)
+
+ filepath := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "core", os.Args[2])
+ output, err := os.OpenFile(filepath, os.O_RDWR|os.O_CREATE, os.ModePerm /*0777*/)
+ if err != nil {
+ fatal("error opening file for writing %v\n", err)
+ }
+
+ output.WriteString(`package core
+
+import "math/big"
+
+var (
+`)
+
+ for name, setting := range m {
+ output.WriteString(fmt.Sprintf("%s=big.NewInt(%d) // %s\n", strings.Title(name), setting.Value, setting.Comment))
+ }
+
+ output.WriteString(")\n")
+ output.Close()
+
+ cmd := exec.Command("gofmt", "-w", filepath)
+ if err := cmd.Run(); err != nil {
+ fatal("gofmt failed: %v\n", err)
+ }
+}
--
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