Enable history vrf in testnet at epoch 74384 (#3854)

* Enable history vrf in testnet

* allow input int of any size

core/vm/evm.go

@@ -63,7 +63,7 @@ func run(evm *EVM, contract *Contract, input []byte, readOnly bool) ([]byte, err
 		if p := precompiles[*contract.CodeAddr]; p != nil {
 			if _, ok := p.(*vrf); ok {
 				if evm.chainRules.IsPrevVRF {
-					requestedBlockNum := big.NewInt(0).SetBytes(input[0:32])
+					requestedBlockNum := big.NewInt(0).SetBytes(input)
 					minBlockNum := big.NewInt(0).Sub(evm.BlockNumber, common.Big257)
 
 					if requestedBlockNum.Cmp(evm.BlockNumber) == 0 {

internal/params/config.go

@@ -81,7 +81,7 @@ var (
 		RedelegationEpoch:          big.NewInt(36500),
 		NoEarlyUnlockEpoch:         big.NewInt(73580),
 		VRFEpoch:                   big.NewInt(73880),
-		PrevVRFEpoch:               EpochTBD,
+		PrevVRFEpoch:               big.NewInt(74384),
 		MinDelegation100Epoch:      big.NewInt(73880),
 		MinCommissionRateEpoch:     big.NewInt(73880),
 		MinCommissionPromoPeriod:   big.NewInt(10),