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core/vm/runtime: simplified runtime calling mechanism

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Implemented `runtime.Call` which uses - unlike Execute - the given state
for the execution and the address of the contract you wish to execute.
Unlike `Execute`, `Call` requires a config.
This commit is contained in:
Jeffrey Wilcke
2016-02-09 23:20:42 +01:00
parent ecc876cec0
commit 6cace73bea
3 changed files with 117 additions and 18 deletions
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36
core/vm_env.go
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@ -25,6 +25,21 @@ import (
"github.com/ethereum/go-ethereum/core/vm"
)
// GetHashFn returns a function for which the VM env can query block hashes thru
// up to the limit defined by the Yellow Paper and uses the given block chain
// to query for information.
func GetHashFn(ref common.Hash, chain *BlockChain) func(n uint64) common.Hash {
return func(n uint64) common.Hash {
for block := chain.GetBlock(ref); block != nil; block = chain.GetBlock(block.ParentHash()) {
if block.NumberU64() == n {
return block.Hash()
}
}
return common.Hash{}
}
}
type VMEnv struct {
state *state.StateDB
header *types.Header
@ -32,17 +47,20 @@ type VMEnv struct {
depth int
chain *BlockChain
typ vm.Type
getHashFn func(uint64) common.Hash
// structured logging
logs []vm.StructLog
}
func NewEnv(state *state.StateDB, chain *BlockChain, msg Message, header *types.Header) *VMEnv {
return &VMEnv{
chain: chain,
state: state,
header: header,
msg: msg,
typ: vm.StdVmTy,
chain: chain,
state: state,
header: header,
msg: msg,
typ: vm.StdVmTy,
getHashFn: GetHashFn(header.ParentHash, chain),
}
}
@ -59,13 +77,7 @@ func (self *VMEnv) SetDepth(i int) { self.depth = i }
func (self *VMEnv) VmType() vm.Type { return self.typ }
func (self *VMEnv) SetVmType(t vm.Type) { self.typ = t }
func (self *VMEnv) GetHash(n uint64) common.Hash {
for block := self.chain.GetBlock(self.header.ParentHash); block != nil; block = self.chain.GetBlock(block.ParentHash()) {
if block.NumberU64() == n {
return block.Hash()
}
}
return common.Hash{}
return self.getHashFn(n)
}
func (self *VMEnv) AddLog(log *vm.Log) {