Fix various build errors and bugs

- bug in hex decoding in bls12381 package
- correct interfaces
- missing test variables

restricted/crypto/bls12381/g1_test.go

@@ -1,21 +1,12 @@
 package bls12381
 
 import (
-	"encoding/hex"
 	"bytes"
 	"crypto/rand"
 	"math/big"
 	"testing"
 )
 
-func fromHex(s string) []byte {
-	b, err := hex.DecodeString(s)
-	if err != nil {
-		panic(err)
-	}
-	return b
-}
-
 func (g *G1) one() *PointG1 {
 	one, _ := g.fromBytesUnchecked(
 		fromHex("" +

restricted/crypto/bls12381/utils.go

@@ -17,15 +17,34 @@
 package bls12381
 
 import (
-	"strings"
 	"encoding/hex"
 	"errors"
 	"math/big"
 )
 
-func bigFromHex(hex string) *big.Int {
-	b, _ := hex.DecodeString(strings.TrimPrefix(hex, "0x"))
-	return new(big.Int).SetBytes(b)
+// fromHex returns the bytes represented by the hexadecimal string s.
+// s may be prefixed with "0x".
+func fromHex(s string) []byte {
+	if has0xPrefix(s) {
+		s = s[2:]
+	}
+	if len(s)%2 == 1 {
+		s = "0" + s
+	}
+	h, err := hex.DecodeString(s)
+	if err != nil {
+		panic(err)
+	}
+	return h
+}
+
+// has0xPrefix validates str begins with '0x' or '0X'.
+func has0xPrefix(str string) bool {
+	return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')
+}
+
+func bigFromHex(s string) *big.Int {
+	return new(big.Int).SetBytes(fromHex(s))
 }
 
 // decodeFieldElement expects 64 byte input with zero top 16 bytes,

restricted/hasher/statetrie.go

@@ -17,11 +17,11 @@
 package hasher
 
 import (
-	"fmt"
 	"bufio"
 	"bytes"
 	"encoding/gob"
 	"errors"
+	"fmt"
 	"io"
 	"sync"
 
@@ -214,7 +214,7 @@ func (st *StackTrie) TryUpdate(key, value []byte) error {
 
 func (st *StackTrie) Update(key, value []byte) {
 	if err := st.TryUpdate(key, value); err != nil {
-		fmt.Errorf("Unhandled trie error in StackTrie.Update", "err", err)
+		fmt.Println("Unhandled trie error in StackTrie.Update:", err)
 	}
 }
 

restricted/params/config.go

@@ -34,6 +34,36 @@ var (
 	CalaverasGenesisHash = core.HexToHash("0xeb9233d066c275efcdfed8037f4fc082770176aefdbcb7691c71da412a5670f2")
 )
 
+var (
+	// TestChainConfig contains every protocol change (EIPs) introduced
+	// and accepted by the Ethereum core developers for testing proposes.
+	TestChainConfig = &ChainConfig{
+		ChainID:                       big.NewInt(1),
+		HomesteadBlock:                big.NewInt(0),
+		DAOForkBlock:                  nil,
+		DAOForkSupport:                false,
+		EIP150Block:                   big.NewInt(0),
+		EIP155Block:                   big.NewInt(0),
+		EIP158Block:                   big.NewInt(0),
+		ByzantiumBlock:                big.NewInt(0),
+		ConstantinopleBlock:           big.NewInt(0),
+		PetersburgBlock:               big.NewInt(0),
+		IstanbulBlock:                 big.NewInt(0),
+		MuirGlacierBlock:              big.NewInt(0),
+		BerlinBlock:                   big.NewInt(0),
+		LondonBlock:                   big.NewInt(0),
+		ArrowGlacierBlock:             big.NewInt(0),
+		GrayGlacierBlock:              big.NewInt(0),
+		MergeNetsplitBlock:            nil,
+		ShanghaiTime:                  nil,
+		CancunTime:                    nil,
+		PragueTime:                    nil,
+		TerminalTotalDifficulty:       nil,
+		TerminalTotalDifficultyPassed: false,
+		Ethash:                        new(EthashConfig),
+		Clique:                        nil,
+	}
+)
 
 // TrustedCheckpoint represents a set of post-processed trie roots (CHT and
 // BloomTrie) associated with the appropriate section index and head hash. It is

restricted/params/config_test.go

@@ -22,6 +22,37 @@ import (
 	"testing"
 )
 
+var (
+	// AllEthashProtocolChanges contains every protocol change (EIPs) introduced
+	// and accepted by the Ethereum core developers into the Ethash consensus.
+	AllEthashProtocolChanges = &ChainConfig{
+		ChainID:                       big.NewInt(1337),
+		HomesteadBlock:                big.NewInt(0),
+		DAOForkBlock:                  nil,
+		DAOForkSupport:                false,
+		EIP150Block:                   big.NewInt(0),
+		EIP155Block:                   big.NewInt(0),
+		EIP158Block:                   big.NewInt(0),
+		ByzantiumBlock:                big.NewInt(0),
+		ConstantinopleBlock:           big.NewInt(0),
+		PetersburgBlock:               big.NewInt(0),
+		IstanbulBlock:                 big.NewInt(0),
+		MuirGlacierBlock:              big.NewInt(0),
+		BerlinBlock:                   big.NewInt(0),
+		LondonBlock:                   big.NewInt(0),
+		ArrowGlacierBlock:             big.NewInt(0),
+		GrayGlacierBlock:              big.NewInt(0),
+		MergeNetsplitBlock:            nil,
+		ShanghaiTime:                  nil,
+		CancunTime:                    nil,
+		PragueTime:                    nil,
+		TerminalTotalDifficulty:       nil,
+		TerminalTotalDifficultyPassed: false,
+		Ethash:                        new(EthashConfig),
+		Clique:                        nil,
+	}
+)
+
 func TestCheckCompatible(t *testing.T) {
 	type test struct {
 		stored, new *ChainConfig

restricted/types/hashing_test.go

@@ -26,10 +26,10 @@ import (
 	"testing"
 
 	"github.com/openrelayxyz/plugeth-utils/core"
-	"github.com/openrelayxyz/plugeth-utils/restricted/hexutil"
-	"github.com/openrelayxyz/plugeth-utils/restricted/types"
 	"github.com/openrelayxyz/plugeth-utils/restricted/crypto"
+	"github.com/openrelayxyz/plugeth-utils/restricted/hexutil"
 	"github.com/openrelayxyz/plugeth-utils/restricted/rlp"
+	"github.com/openrelayxyz/plugeth-utils/restricted/types"
 )
 
 func fromHex(data string) []byte {
@@ -136,9 +136,10 @@ func (d *hashToHumanReadable) Reset() {
 	d.data = make([]byte, 0)
 }
 
-func (d *hashToHumanReadable) Update(i []byte, i2 []byte) {
+func (d *hashToHumanReadable) Update(i []byte, i2 []byte) error {
 	l := fmt.Sprintf("%x %x\n", i, i2)
 	d.data = append(d.data, []byte(l)...)
+	return nil
 }
 
 func (d *hashToHumanReadable) Hash() core.Hash {