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Return bool from evmc_get_balance_fn()

This commit is contained in:
Paweł Bylica 2018-09-06 08:48:19 +02:00
parent ae4a79a9b9
commit ca85b77f57
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GPG Key ID: 7A0C037434FE77EF
4 changed files with 23 additions and 13 deletions
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4
bindings/go/evmc/host.c
View File

@ -69,8 +69,8 @@ static inline void go_exported_functions_type_checks()
storage_status = setStorage(context, address, uint256be, uint256be); storage_status = setStorage(context, address, uint256be, uint256be);
evmc_get_balance_fn get_balance_fn = NULL; evmc_get_balance_fn get_balance_fn = NULL;
get_balance_fn(uint256be, context, address); bool_flag = get_balance_fn(uint256be, context, address);
getBalance(uint256be, context, address); bool_flag = getBalance(uint256be, context, address);
evmc_get_code_size_fn get_code_size_fn = NULL; evmc_get_code_size_fn get_code_size_fn = NULL;
size = get_code_size_fn(context, address); size = get_code_size_fn(context, address);

10
bindings/go/evmc/host.go
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@ -73,7 +73,7 @@ type HostContext interface {
AccountExists(addr common.Address) bool AccountExists(addr common.Address) bool
GetStorage(addr common.Address, key common.Hash) common.Hash GetStorage(addr common.Address, key common.Hash) common.Hash
SetStorage(addr common.Address, key common.Hash, value common.Hash) StorageStatus SetStorage(addr common.Address, key common.Hash, value common.Hash) StorageStatus
GetBalance(addr common.Address) common.Hash GetBalance(addr common.Address) (common.Hash, error)
GetCodeSize(addr common.Address) int GetCodeSize(addr common.Address) int
GetCodeHash(addr common.Address) common.Hash GetCodeHash(addr common.Address) common.Hash
GetCode(addr common.Address) []byte GetCode(addr common.Address) []byte
@ -110,11 +110,15 @@ func setStorage(pCtx unsafe.Pointer, pAddr *C.struct_evmc_address, pKey *C.struc
} }
//export getBalance //export getBalance
func getBalance(pResult *C.struct_evmc_uint256be, pCtx unsafe.Pointer, pAddr *C.struct_evmc_address) { func getBalance(pResult *C.struct_evmc_uint256be, pCtx unsafe.Pointer, pAddr *C.struct_evmc_address) C.bool {
idx := int((*C.struct_extended_context)(pCtx).index) idx := int((*C.struct_extended_context)(pCtx).index)
ctx := getHostContext(idx) ctx := getHostContext(idx)
balance := ctx.GetBalance(goAddress(*pAddr)) balance, err := ctx.GetBalance(goAddress(*pAddr))
if err != nil {
return false
}
*pResult = evmcUint256be(balance) *pResult = evmcUint256be(balance)
return true
} }
//export getCodeSize //export getCodeSize

3
examples/example_host.cpp
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@ -54,9 +54,10 @@ static enum evmc_storage_status set_storage(evmc_context* context,
return EVMC_STORAGE_UNCHANGED; return EVMC_STORAGE_UNCHANGED;
} }
static void get_balance(evmc_uint256be* result, evmc_context* context, const evmc_address* address) static bool get_balance(evmc_uint256be* result, evmc_context* context, const evmc_address* address)
{ {
*result = balance(context, address); *result = balance(context, address);
return true;
} }
static size_t get_code_size(evmc_context* context, const evmc_address* address) static size_t get_code_size(evmc_context* context, const evmc_address* address)

17
include/evmc/evmc.h
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@ -475,14 +475,19 @@ typedef enum evmc_storage_status (*evmc_set_storage_fn)(struct evmc_context* con
/** /**
* Get balance callback function. * Get balance callback function.
* *
* This callback function is used by an EVM to query the balance of the given * This callback function is used by a VM to query the balance of the given address.
* address. *
* @param[out] result The returned balance value. * @param[out] result The pointer to the place where to put the result balance.
* The pointed memory is only modified when the function returns true.
* The pointer MUST NOT be null.
* @param context The pointer to the Host execution context. * @param context The pointer to the Host execution context.
* @see ::evmc_context. * @param address The address of the account.
* @param address The address. * @return If the account exists its balance is put at the location
* pointed by @p result and true is returned.
* If the account does not exist false is returned without
* modifying the memory pointed by @p result.
*/ */
typedef void (*evmc_get_balance_fn)(struct evmc_uint256be* result, typedef bool (*evmc_get_balance_fn)(struct evmc_uint256be* result,
struct evmc_context* context, struct evmc_context* context,
const struct evmc_address* address); const struct evmc_address* address);