Creates an abstract layer over blockchain SDKs, enabling integration with multiple blockchains using a unified architecture. Features wallet management, client support, transaction tools, and blockchain types.
A Kotlin Multiplatform crypto wallet SDK that provides a unified abstraction layer for multiple blockchain networks.
Chameleon solves the integration complexity of working with multiple blockchain SDKs by providing a consistent architecture across different blockchain networks. Instead of learning and maintaining separate SDKs for each blockchain, Chameleon offers a single, unified API.
Chameleon is organized into modular components:
chameleon/
├── core/ # Core wallet, crypto, and type abstractions
│ ├── crypto/ # Cryptographic primitives
│ ├── wallet/ # Wallet, key management, BIP39/BIP32
│ ├── tool/ # Transaction signer, broadcaster interfaces
│ └── /
├── cosmos/
│ ├── wallet/
│ ├── /
│ ├── tool/
│ ├── client-grpc/
│ └── client-grpc-gateway/
├── terra/
├── sei/
├── injective/
└── initia/
Add the following to your build.gradle.kts:
repositories {
mavenCentral()
}
dependencies {
// Core wallet functionality
implementation("kr.jadekim:chameleon-core-wallet:$chameleonVersion")
// For Cosmos blockchain
implementation("kr.jadekim:chameleon-cosmos-wallet:$chameleonVersion")
implementation("kr.jadekim:chameleon-cosmos-tool:$chameleonVersion")
// For Terra blockchain
implementation("kr.jadekim:chameleon-terra-wallet:$chameleonVersion")
// Add other blockchain modules as needed
}
<dependency>
<groupId>kr.jadekim</groupId>
<artifactId>chameleon-core-wallet</artifactId>
<version>${chameleonVersion}</version>
</dependency>
import kr.jadekim.chameleon.cosmos.wallet.CosmosWallet
import kr.jadekim.chameleon.core.mnemonic.Mnemonic
// Generate a new 24-word mnemonic and create a wallet
val (wallet, key) = CosmosWallet.create(
mnemonic = Mnemonic.generate(Mnemonic.Strength.WORD_24),
account = 0u,
index = 0u
)
println("Address: ${wallet.address.text}")
println("Mnemonic: ${key.mnemonic}")
val (wallet, key) = CosmosWallet.fromMnemonic(
mnemonic = "your twelve or twenty four word mnemonic phrase here...",
account = 0u,
index = 0u
)
val privateKeyBytes = hexStringToByteArray("your_private_key_hex")
val wallet = CosmosWallet.fromKeyPair(privateKeyBytes)
// Sign a message
val message = "Hello, Blockchain!".encodeToByteArray()
val signature = wallet.sign(message).await()
// Verify a signature
val isValid = wallet.verify(message, signature)
println("Signature valid: $isValid")
import kr.jadekim.chameleon.cosmos.Cosmos
import kr.jadekim.chameleon.cosmos.CosmosOptions
import cosmos.tx.v1beta1.Tx
import cosmos.tx.v1beta1.TxBody
import cosmos.base.v1beta1.Coin
// Create client
val options = CosmosOptions(
chainId = "cosmoshub-4",
client = CosmosGrpcClient(),
)
cosmos = Cosmos(options)
tx = Tx(
body = TxBody(
messages = listOf(),
memo =
),
authInfo = AuthInfo()
)
transactionResult = cosmos.broadcast(tx, wallet)
import kr.jadekim.chameleon.core.mnemonic.Mnemonic
import kr.jadekim.chameleon.core.mnemonic.wordlist.Wordlist
// Generate mnemonic (default language is English)
val mnemonic = Mnemonic.generate(strength = Mnemonic.Strength.WORD_12)
// Generate Korean mnemonic
val koreanMnemonic = Mnemonic.generate(
strength = Mnemonic.Strength.WORD_12,
wordlist = Wordlist.KOREAN
)
// Generate Japanese mnemonic
val japaneseMnemonic = Mnemonic.generate(
strength = Mnemonic.Strength.WORD_24,
wordlist = Wordlist.JAPANESE
)
# Clone the repository
git clone https://github.com/jdekim43/chameleon.git
cd chameleon
# Build all modules
./gradlew build
# Run tests
./gradlew test
# Publish to local Maven repository
./gradlew publishToMavenLocal
Contributions are welcome! Please feel free to submit a Pull Request.
git checkout -b feature/amazing-feature)git commit -m 'Add some amazing feature')git push origin feature/amazing-feature)This project is licensed under the Apache License 2.0 - see the LICENSE file for details.
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