/**
* Solana Transaction Builder
* Build and manage Solana transactions
*/
import {
Transaction,
TransactionInstruction as SolanaTransactionInstruction,
PublicKey,
Keypair,
Connection,
} from '@solana/web3.js';
export interface TransactionInstruction {
programId: string;
keys: Array<{
pubkey: string;
isSigner: boolean;
isWritable: boolean;
}>;
data: Buffer;
}
export interface TransactionOptions {
feePayer?: string;
recentBlockhash?: string;
signers?: Keypair[];
priorityFee?: number;
}
export class SolanaTransactionBuilder {
private instructions: SolanaTransactionInstruction[] = [];
private connection: Connection;
constructor(connection: Connection) {
this.connection = connection;
}
addInstruction(instruction: TransactionInstruction): this {
const ix = new SolanaTransactionInstruction({
programId: new PublicKey(instruction.programId),
keys: instruction.keys.map(k => ({
pubkey: new PublicKey(k.pubkey),
isSigner: k.isSigner,
isWritable: k.isWritable,
})),
data: instruction.data,
});
this.instructions.push(ix);
return this;
}
async build(options: TransactionOptions): Promise<Transaction> {
const tx = new Transaction();
if (options.feePayer) {
tx.feePayer = new PublicKey(options.feePayer);
}
if (options.recentBlockhash) {
tx.recentBlockhash = options.recentBlockhash;
} else {
const { blockhash } = await this.connection.getLatestBlockhash();
tx.recentBlockhash = blockhash;
}
for (const ix of this.instructions) {
tx.add(ix);
}
return tx;
}
clear(): void {
this.instructions = [];
}
}
