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refactoring(spv-790) addressing leatest review changes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package pike_test | ||
|
|
||
| import ( | ||
| "encoding/hex" | ||
| "fmt" | ||
|
|
||
| "github.com/libsv/go-bk/bec" | ||
|
|
||
| "github.com/bitcoin-sv/spv-wallet/engine/pike" | ||
| ) | ||
|
|
||
| func Example_generateLockingScripts() { | ||
| // Example sender's public key (replace with actual sender's public key) | ||
| senderPublicKeyHex := "034252e5359a1de3b8ec08e6c29b80594e88fb47e6ae9ce65ee5a94f0d371d2cde" | ||
| senderPublicKeyBytes, err := hex.DecodeString(senderPublicKeyHex) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| senderPubKey, err := bec.ParsePubKey(senderPublicKeyBytes, bec.S256()) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| receiverPublicKeyHex := "027c1404c3ecb034053e6dd90bc68f7933284559c7d0763367584195a8796d9b0e" | ||
| receiverPublicKeyBytes, err := hex.DecodeString(receiverPublicKeyHex) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| receiverPubKey, err := bec.ParsePubKey(receiverPublicKeyBytes, bec.S256()) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // Example usage of GenerateOutputsTemplate | ||
| outputsTemplate, err := pike.GenerateOutputsTemplate(10000) | ||
| if err != nil { | ||
| panic(fmt.Errorf("Error generating outputs template - %w", err)) | ||
| } | ||
|
|
||
| // Example usage of GenerateLockingScriptsFromTemplates | ||
| lockingScripts, err := pike.GenerateLockingScriptsFromTemplates(outputsTemplate, senderPubKey, receiverPubKey, "reference") | ||
| if err != nil { | ||
| panic(fmt.Errorf("Error generating locking scripts - %w", err)) | ||
| } | ||
|
|
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| for _, script := range lockingScripts { | ||
| fmt.Println("Locking Script:", script) | ||
| } | ||
|
|
||
| // Output: | ||
| // Locking Script: 76a9147327490be831259f38b0f9ab019413e51d1b40c688ac | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| package template | ||
|
|
||
| import ( | ||
| "errors" | ||
|
|
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| "github.com/libsv/go-bk/bec" | ||
| "github.com/libsv/go-bk/crypto" | ||
| "github.com/libsv/go-bt/v2/bscript" | ||
| "github.com/libsv/go-bt/v2/bscript/interpreter" | ||
| ) | ||
|
|
||
| // Evaluate processes a given Bitcoin script by parsing it, replacing certain opcodes | ||
| // with the public key hash, and returning the resulting script as a byte array. | ||
| // Will replace any OP_PUBKEYHASH or OP_PUBKEY | ||
| // | ||
| // Parameters: | ||
| // - script: A byte array representing the input script. | ||
| // - pubKey: A pointer to a bec.PublicKey which provides the dedicated public key to be used in the evaluation. | ||
| // | ||
| // Returns: | ||
| // - A byte array representing the evaluated script, or nil if an error occurs. | ||
| func Evaluate(script []byte, pubKey *bec.PublicKey) ([]byte, error) { | ||
| s := bscript.Script(script) | ||
|
|
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| parser := interpreter.DefaultOpcodeParser{} | ||
| parsedScript, err := parser.Parse(&s) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Validate parsed opcodes | ||
| for _, op := range parsedScript { | ||
| if op.Value() == 0xFF { | ||
| return nil, errors.New("invalid opcode") | ||
| } | ||
| } | ||
|
|
||
| // Serialize the public key to compressed format | ||
| dPKBytes := pubKey.SerialiseCompressed() | ||
|
|
||
| // Apply Hash160 (SHA-256 followed by RIPEMD-160) to the compressed public key | ||
| dPKHash := crypto.Hash160(dPKBytes) | ||
|
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||
| // Create a new script with the public key hash | ||
| newScript := new(bscript.Script) | ||
| if err := newScript.AppendPushData(dPKHash); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Parse the public key hash script | ||
| pkhParsed, err := parser.Parse(newScript) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Replace OP_PUBKEYHASH with the actual public key hash | ||
| evaluated := make([]interpreter.ParsedOpcode, 0, len(parsedScript)) | ||
| for _, op := range parsedScript { | ||
| switch op.Value() { | ||
| case bscript.OpPUBKEYHASH: | ||
| evaluated = append(evaluated, pkhParsed...) | ||
| case bscript.OpPUBKEY: | ||
| return nil, errors.New("OP_PUBKEY not supported yet") | ||
| default: | ||
| evaluated = append(evaluated, op) | ||
| } | ||
| } | ||
|
|
||
| // Unparse the evaluated opcodes back into a script | ||
| finalScript, err := parser.Unparse(evaluated) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Cast *bscript.Script back to []byte | ||
| return []byte(*finalScript), nil | ||
| } |
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