55 lines
1.3 KiB
TypeScript
55 lines
1.3 KiB
TypeScript
import {
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Commitment,
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Connection,
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PublicKey,
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PublicKeyInitData,
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} from "@solana/web3.js";
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import { deriveAddress, getAccountData } from "../../utils";
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export function deriveClaimKey(
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programId: PublicKeyInitData,
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emitterAddress: Buffer | Uint8Array | string,
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emitterChain: number,
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sequence: bigint | number
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): PublicKey {
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const address =
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typeof emitterAddress == "string"
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? Buffer.from(emitterAddress, "hex")
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: Buffer.from(emitterAddress);
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if (address.length != 32) {
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throw Error("address.length != 32");
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}
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const sequenceSerialized = Buffer.alloc(8);
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sequenceSerialized.writeBigUInt64BE(
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typeof sequence == "number" ? BigInt(sequence) : sequence
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);
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return deriveAddress(
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[
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address,
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(() => {
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const buf = Buffer.alloc(2);
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buf.writeUInt16BE(emitterChain as number);
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return buf;
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})(),
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sequenceSerialized,
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],
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programId
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);
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}
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export async function getClaim(
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connection: Connection,
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programId: PublicKeyInitData,
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emitterAddress: Buffer | Uint8Array | string,
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emitterChain: number,
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sequence: bigint | number,
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commitment?: Commitment
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): Promise<boolean> {
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return connection
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.getAccountInfo(
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deriveClaimKey(programId, emitterAddress, emitterChain, sequence),
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commitment
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)
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.then((info) => !!getAccountData(info)[0]);
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}
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