Read most protocol params from common/params.json

* Add params package with exported variables generated from
  github.com/ethereum/common/blob/master/params.json
* Use params package variables in applicable places
* Add check for minimum gas limit in validation of block's gas limit
* Remove common/params.json from go-ethereum to avoid
  outdated version of it

2 files changed, 5 insertions, 58 deletions

diff --git a/generators/default.json b/generators/default.json
deleted file mode 100644
index 181a9dd54..000000000
--- a/generators/default.json
+++ /dev/null
@@ -1,56 +0,0 @@
-{
-	"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
index b0c71111c..41d46729c 100644
--- a/generators/defaults.go
+++ b/generators/defaults.go
@@ -35,13 +35,16 @@ func main() {
 	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])
+	filepath := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "params", 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
+	output.WriteString(`// DO NOT EDIT!!!
+// AUTOGENERATED FROM generators/defaults.go
+
+package params
 
 import "math/big"