Added doc comments

x/evm/keeper/precompile.go

@@ -28,6 +28,7 @@ type InitializationConfig struct {
 	Uninitialize          []common.Address
 }
 
+// SyncEnabledPrecompiles is a keeper wrapper over the SyncEnabledPrecompiles function, which does most of the work.
 func (k *Keeper) SyncEnabledPrecompiles(ctx sdk.Context, enabledPrecompiles []common.Address) error {
 	txConfig := statedb.TxConfig{
 		BlockHash: common.Hash{},
@@ -51,11 +52,19 @@ func (k *Keeper) SyncEnabledPrecompiles(ctx sdk.Context, enabledPrecompiles []co
 	return nil
 }
 
+// SyncEnabledPrecompiles takes enabled precompiles from old state and new state and performs following steps:
+// - determines a list of contracts that must be validated and validates their state
+// - determines a list of contracts that must be initialized and initializes them
+// - determines a list of contracts that must be uninitialized and uninitializes them
 func SyncEnabledPrecompiles(stateDB StateDB, old []common.Address, new []common.Address) error {
 	cfg := DetermineInitializationConfig(old, new)
 	return ApplyInitializationConfig(stateDB, cfg)
 }
 
+// DetermineInitializationConfig takes enabled precompiles from old state and new state and performs following steps:
+// - determines a list of contracts that must be validated
+// - determines a list of contracts that must be initialized
+// - determines a list of contracts that must be uninitialized
 func DetermineInitializationConfig(old []common.Address, new []common.Address) *InitializationConfig {
 	return &InitializationConfig{
 		ValidateInitialized:   old,
@@ -65,6 +74,7 @@ func DetermineInitializationConfig(old []common.Address, new []common.Address) *
 	}
 }
 
+// ApplyInitializationConfig performs precompile initialization based on InitializationConfig.
 func ApplyInitializationConfig(stateDB StateDB, cfg *InitializationConfig) error {
 	if err := ValidatePrecompilesInitialized(stateDB, cfg.ValidateInitialized); err != nil {
 		return err