diff --git a/types/stellar-sdk/index.d.ts b/types/stellar-sdk/index.d.ts
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+// Type definitions for stellar-sdk 0.8
+// Project: https://github.com/stellar/js-stellar-sdk
+// Definitions by: Carl Foster <https://github.com/carl-foster>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+/// <reference types="node" />
+
+export class Account {
+    constructor(accountId: string, sequence: string | number)
+    accountId(): string;
+    sequenceNumber(): string;
+    incrementSequenceNumber(): void;
+}
+
+export class CallBuilder<T extends Record> {
+    constructor(serverUrl: string)
+    call(): Promise<CollectionPage<T>>;
+    cursor(cursor: string): this;
+    limit(limit: number): this;
+    order(direction: 'asc' | 'desc'): this;
+    stream(options?: { onmessage?: () => void, onerror?: () => void }): () => void;
+}
+
+export interface CollectionPage<T extends Record> {
+    records: T[];
+    next: () => Promise<CollectionPage<T>>;
+    prev: () => Promise<CollectionPage<T>>;
+}
+
+export interface Record {
+    _links: {
+        [key: string]: RecordLink
+    };
+}
+
+export interface RecordLink {
+    href: string;
+    templated?: boolean;
+}
+
+/* Due to a bug with the recursive function requests */
+export interface CollectionRecord<T extends Record> {
+    _links: {
+        next: RecordLink
+        prev: RecordLink
+        self: RecordLink
+    };
+    _embedded: {
+        records: T[]
+    };
+}
+
+export interface CallFunctionTemplateOptions {
+    cursor?: string | number;
+    limit?: number;
+    order?: 'asc' | 'desc';
+}
+
+export type CallFunction<T extends Record> = () => Promise<T>;
+export type CallCollectionFunction<T extends Record> =
+    (options?: CallFunctionTemplateOptions) => Promise<CollectionRecord<T>>;
+
+export interface AccountRecord extends Record {
+    id: string;
+    paging_token: string;
+    account_id: string;
+    sequence: number;
+    subentry_count: number;
+    thresholds: {
+        low_threshold: number
+        med_threshold: number
+        high_threshold: number
+    };
+    flags: {
+        auth_required: boolean
+        auth_revocable: boolean
+    };
+    balances: Array<
+    {
+        balance: string
+        asset_type: 'native'
+    } |
+    {
+        balance: string
+        limit: string
+        asset_type: 'credit_alphanum4' | 'credit_alphanum12'
+        asset_code: string
+        asset_issuer: string
+    }
+    >;
+    signers: Array<
+    {
+        _key: string
+        weight: number
+    }
+    >;
+    data: {
+        [key: string]: string
+    };
+
+    effects: CallCollectionFunction<EffectRecord>;
+    offers: CallCollectionFunction<OfferRecord>;
+    operations: CallCollectionFunction<OperationRecord>;
+    payments: CallCollectionFunction<PaymentOperationRecord>;
+    trades: CallCollectionFunction<TradeRecord>;
+}
+
+export interface AssetRecord extends Record {
+    asset_type: 'credit_alphanum4' | 'credit_alphanum12';
+    asset_code: string;
+    asset_issuer: string;
+    paging_token: string;
+    amount: string;
+    num_accounts: number;
+    flags: {
+        auth_required: boolean
+        auth_revocable: boolean
+    };
+}
+
+export interface EffectRecord extends Record {
+    account: string;
+    paging_token: string;
+    starting_balance: string;
+    type_i: string;
+    type: string;
+
+    operation?: CallFunction<OperationRecord>;
+    precedes?: CallFunction<EffectRecord>;
+    succeeds?: CallFunction<EffectRecord>;
+}
+
+export interface LedgerRecord extends Record {
+    id: string;
+    paging_token: string;
+    hash: string;
+    prev_hash: string;
+    sequence: number;
+    transaction_count: number;
+    operation_count: number;
+    closed_at: string;
+    total_coins: string;
+    fee_pool: string;
+    base_fee: number;
+    base_reserve: string;
+    max_tx_set_size: number;
+    protocol_version: number;
+    header_xdr: string;
+    base_fee_in_stroops: number;
+    base_reserve_in_stroops: number;
+
+    effects: CallCollectionFunction<EffectRecord>;
+    operations: CallCollectionFunction<OperationRecord>;
+    self: CallFunction<LedgerRecord>;
+    transactions: CallCollectionFunction<TransactionRecord>;
+}
+
+export interface OfferRecord extends Record {
+    id: string;
+    paging_token: string;
+    seller_attr: string;
+    selling: Asset;
+    buying: Asset;
+    amount: string;
+    price_r: { numerator: number, denominator: number };
+    price: string;
+
+    seller?: CallFunction<AccountRecord>;
+}
+
+export interface BaseOperationRecord extends Record {
+    id: string;
+    paging_token: string;
+    type: string;
+    type_i: number;
+
+    self: CallFunction<OperationRecord>;
+    succeeds: CallFunction<OperationRecord>;
+    precedes: CallFunction<OperationRecord>;
+    effects: CallCollectionFunction<EffectRecord>;
+    transaction: CallFunction<TransactionRecord>;
+}
+
+export interface CreateAccountOperationRecord extends BaseOperationRecord {
+    type: 'create_account';
+    account: string;
+    funder: string;
+    starting_balance: string;
+}
+
+export interface PaymentOperationRecord extends BaseOperationRecord {
+    type: 'payment';
+    from: string;
+    to: string;
+    asset_type: string;
+    asset_code?: string;
+    asset_issuer?: string;
+    amount: string;
+
+    sender: CallFunction<AccountRecord>;
+    receiver: CallFunction<AccountRecord>;
+}
+
+export interface PathPaymentOperationRecord extends BaseOperationRecord {
+    type: 'path_payment';
+    from: string;
+    to: string;
+    asset_code?: string;
+    asset_issuer?: string;
+    asset_type: string;
+    amount: string;
+    source_asset_code?: string;
+    source_asset_issuer?: string;
+    source_asset_type: string;
+    source_max: string;
+    source_amount: string;
+}
+
+export interface ManageOfferOperationRecord extends BaseOperationRecord {
+    type: 'manage_offer';
+    offer_id: number;
+    amount: string;
+    buying_asset_code?: string;
+    buying_asset_issuer?: string;
+    buying_asset_type: string;
+    price: string;
+    price_r: { numerator: number, denominator: number };
+    selling_asset_code?: string;
+    selling_asset_issuer?: string;
+    selling_asset_type: string;
+}
+
+export interface PassiveOfferOperationRecord extends BaseOperationRecord {
+    type: 'create_passive_offer';
+    offer_id: number;
+    amount: string;
+    buying_asset_code?: string;
+    buying_asset_issuer?: string;
+    buying_asset_type: string;
+    price: string;
+    price_r: { numerator: number, denominator: number };
+    selling_asset_code?: string;
+    selling_asset_issuer?: string;
+    selling_asset_type: string;
+}
+
+export interface SetOptionsOperationRecord extends BaseOperationRecord {
+    type: 'set_options';
+    signer_key?: string;
+    signer_weight?: number;
+    master_key_weight?: number;
+    low_threshold?: number;
+    med_threshold?: number;
+    high_threshold?: number;
+    home_domain?: string;
+    set_flags: Array<(1 | 2)>;
+    set_flags_s: Array<('auth_required_flag' | 'auth_revocable_flag')>;
+    clear_flags: Array<(1 | 2)>;
+    clear_flags_s: Array<('auth_required_flag' | 'auth_revocable_flag')>;
+}
+
+export interface ChangeTrustOperationRecord extends BaseOperationRecord {
+    type: 'change_trust';
+    asset_code: string;
+    asset_issuer: string;
+    asset_type: string;
+    trustee: string;
+    trustor: string;
+    limit: string;
+}
+
+export interface AllowTrustOperationRecord extends BaseOperationRecord {
+    type: 'allow_trust';
+    asset_code: string;
+    asset_issuer: string;
+    asset_type: string;
+    authorize: boolean;
+    trustee: string;
+    trustor: string;
+}
+
+export interface AccountMergeOperationRecord extends BaseOperationRecord {
+    type: 'account_merge';
+    into: string;
+}
+
+export interface InflationOperationRecord extends BaseOperationRecord {
+    type: 'inflation';
+}
+
+export interface ManageDataOperationRecord extends BaseOperationRecord {
+    type: 'manage_data';
+    name: string;
+    value: string;
+}
+
+export type OperationRecord = CreateAccountOperationRecord
+    | PaymentOperationRecord
+    | PathPaymentOperationRecord
+    | ManageOfferOperationRecord
+    | PassiveOfferOperationRecord
+    | SetOptionsOperationRecord
+    | ChangeTrustOperationRecord
+    | AllowTrustOperationRecord
+    | AccountMergeOperationRecord
+    | InflationOperationRecord
+    | ManageDataOperationRecord;
+
+export interface OrderbookRecord extends Record {
+    bids: Array<{ price_r: {}, price: number, amount: string }>;
+    asks: Array<{ price_r: {}, price: number, amount: string }>;
+    selling: Asset;
+    buying: Asset;
+}
+
+export interface PaymentPathRecord extends Record {
+    path: Array<{
+        asset_code: string
+        asset_issuer: string
+        asset_type: string
+    }>;
+    source_amount: string;
+    source_asset_type: string;
+    source_asset_code: string;
+    source_asset_issuer: string;
+    destination_amount: string;
+    destination_asset_type: string;
+    destination_asset_code: string;
+    destination_asset_issuer: string;
+}
+
+export interface TradeRecord extends Record {
+    id: string;
+    paging_token: string;
+    ledger_close_time: string;
+    base_account: string;
+    base_amount: string;
+    base_asset_type: string;
+    base_asset_code: string;
+    base_asset_issuer: string;
+    counter_account: string;
+    counter_amount: string;
+    counter_asset_type: string;
+    counter_asset_code: string;
+    counter_asset_issuer: string;
+    base_is_seller: boolean;
+
+    base: CallFunction<AccountRecord>;
+    counter: CallFunction<AccountRecord>;
+    operation: CallFunction<OperationRecord>;
+}
+
+export interface TradeAggregationRecord extends Record {
+    timestamp: string;
+    trade_count: number;
+    base_volume: string;
+    counter_volume: string;
+    avg: string;
+    high: string;
+    low: string;
+    open: string;
+    close: string;
+}
+
+export interface TransactionRecord extends Record {
+    id: string;
+    paging_token: string;
+    hash: string;
+    ledger_attr: number;
+    created_at: string;
+    max_fee: number;
+    fee_paid: number;
+    operation_count: number;
+    result_code: number;
+    result_code_s: string;
+    source_account: string;
+    source_account_sequence: string;
+    envelope_xdr: string;
+    result_xdr: string;
+    result_meta_xdr: string;
+    memo: string;
+
+    account: CallFunction<AccountRecord>;
+    effects: CallCollectionFunction<EffectRecord>;
+    ledger: CallFunction<LedgerRecord>;
+    operations: CallCollectionFunction<OperationRecord>;
+    precedes: CallFunction<TransactionRecord>;
+    self: CallFunction<TransactionRecord>;
+    succeeds: CallFunction<TransactionRecord>;
+}
+
+export class AccountCallBuilder extends CallBuilder<AccountRecord> {
+    accountId(id: string): this;
+}
+export class AccountResponse implements AccountRecord {
+    _links: { [key: string]: { href: string } };
+    id: string;
+    paging_token: string;
+    account_id: string;
+    sequence: number;
+    subentry_count: number;
+    thresholds: {
+        low_threshold: number
+        med_threshold: number
+        high_threshold: number
+    };
+    flags: {
+        auth_required: boolean
+        auth_revocable: boolean
+    };
+    balances: Array<
+        {
+            balance: string
+            asset_type: 'native'
+        } |
+        {
+            balance: string
+            limit: string
+            asset_type: 'credit_alphanum4' | 'credit_alphanum12'
+            asset_code: string
+            asset_issuer: string
+        }
+        >;
+    signers: Array<
+        {
+            _key: string
+            weight: number
+        }
+        >;
+    data: {
+        [key: string]: string
+    };
+
+    effects: CallCollectionFunction<EffectRecord>;
+    offers: CallCollectionFunction<OfferRecord>;
+    operations: CallCollectionFunction<OperationRecord>;
+    payments: CallCollectionFunction<PaymentOperationRecord>;
+    trades: CallCollectionFunction<TradeRecord>;
+    constructor(response: AccountRecord)
+    accountId(): string;
+    sequenceNumber(): string;
+    incrementSequenceNumber(): void;
+}
+
+export class Asset {
+    static native(): Asset;
+    constructor(code: string, issuer: string)
+
+    getCode(): string;
+    getIssuer(): string;
+    getAssetType(): 'native' | 'credit_alphanum4' | 'credit_alphanum12';
+    isNative(): boolean;
+    equals(other: Asset): boolean;
+
+    code: string;
+    issuer: string;
+}
+
+export class AssetsCallBuilder extends CallBuilder<AssetRecord> {
+    forCode(value: string): this;
+    forIssuer(value: string): this;
+}
+
+export namespace Config {
+    function setAllowHttp(allow: boolean): void;
+    function isAllowHttp(): boolean;
+    function setDefault(): void;
+}
+
+export class EffectCallBuilder extends CallBuilder<EffectRecord> {
+    forAccount(accountId: string): this;
+    forLedger(sequence: string): this;
+    forOperation(operationId: number): this;
+    forTransaction(transactionId: string): this;
+}
+
+export interface FederationRecord {
+    account_id: string;
+    memo_type?: string;
+    memo?: string;
+}
+
+export interface FederationOptions {
+    allowHttp: boolean;
+}
+export class FederationServer {
+    static createForDomain(domain: string, options?: FederationOptions): Promise<FederationServer>;
+    static resolve(value: string, options?: FederationOptions): Promise<FederationRecord>;
+
+    constructor(serverURL: string, domain: string, options?: FederationOptions)
+    resolveAccountId(account: string): Promise<FederationRecord>;
+    resolveAddress(address: string): Promise<FederationRecord>;
+    resolveTransactionId(transactionId: string): Promise<FederationRecord>;
+}
+
+export class LedgerCallBuilder extends CallBuilder<LedgerRecord> { }
+
+export class Memo {
+    static fromXDRObject(memo: xdr.Memo): Memo;
+    static hash(hash: string): Memo;
+    static id(id: string): Memo;
+    static none(): Memo;
+    static return(hash: string): Memo;
+    static text(text: string): Memo;
+
+    constructor(type: 'MemoNone')
+    constructor(type: 'MemoID' | 'MemoText', value: string)
+    constructor(type: 'MemoHash' | 'MemoReturn', value: Buffer)
+
+    type: 'MemoNone' | 'MemoID' | 'MemoText' | 'MemoHash' | 'MemoReturn';
+    value: null | string | Buffer;
+
+    toXDRObject(): xdr.Memo;
+}
+
+export enum Networks {
+    PUBLIC = 'Public Global Stellar Network ; September 2015',
+    TESTNET = 'Test SDF Network ; September 2015',
+}
+
+export class Network {
+    static use(network: Network): void;
+    static usePublicNetwork(): void;
+    static useTestNetwork(): void;
+    static current(): Network;
+
+    constructor(passphrase: string)
+
+    networkPassphrase(): string;
+    networkId(): string;
+}
+
+export class OfferCallBuilder extends CallBuilder<OfferRecord> { }
+
+export type TransactionOperation =
+    Operation.CreateAccount
+    | Operation.Payment
+    | Operation.PathPayment
+    | Operation.CreatePassiveOffer
+    | Operation.ManageOffer
+    | Operation.SetOptions
+    | Operation.ChangeTrust
+    | Operation.AllowTrust
+    | Operation.AccountMerge
+    | Operation.Inflation
+    | Operation.ManageData;
+
+export enum OperationType {
+    createAccount = 'createAccount',
+    payment = 'payment',
+    pathPayment = 'pathPayment',
+    createPassiveOffer = 'createPassiveOffer',
+    manageOffer = 'manageOffer',
+    setOptions = 'setOptions',
+    changeTrust = 'changeTrust',
+    allowTrust = 'allowTrust',
+    accountMerge = 'accountMerge',
+    inflation = 'inflation',
+    manageData = 'manageData',
+}
+
+export namespace Operation {
+    interface Operation {
+        type: OperationType;
+        source: string | null;
+    }
+    interface AccountMerge extends Operation {
+        type: OperationType.accountMerge;
+        destination: string;
+    }
+    interface AccountMergeOptions {
+        destination: string;
+        source?: string;
+    }
+    function accountMerge(options: AccountMergeOptions): xdr.Operation<AccountMerge>;
+
+    interface AllowTrust extends Operation {
+        type: OperationType.allowTrust;
+        trustor: string;
+        assetCode: string;
+        authorize: boolean;
+    }
+    interface AllowTrustOptions {
+        trustor: string;
+        assetCode: string;
+        authorize: boolean;
+        source?: string;
+    }
+    function allowTrust(options: AllowTrustOptions): xdr.Operation<AllowTrust>;
+
+    interface ChangeTrust extends Operation {
+        type: OperationType.changeTrust;
+        line: Asset;
+        limit: string | number;
+    }
+    interface ChangeTrustOptions {
+        asset: Asset;
+        limit: string;
+        source?: string;
+    }
+    function changeTrust(options: ChangeTrustOptions): xdr.Operation<ChangeTrust>;
+
+    interface CreateAccount extends Operation {
+        type: OperationType.createAccount;
+        source: string;
+        destination: string;
+        startingBalance: string | number;
+    }
+    interface CreateAccountOptions {
+        destination: string;
+        startingBalance: string;
+        source?: string;
+    }
+    function createAccount(options: CreateAccountOptions): xdr.Operation<CreateAccount>;
+
+    interface CreatePassiveOffer extends Operation {
+        type: OperationType.createPassiveOffer;
+        selling: Asset;
+        buying: Asset;
+        amount: string | number;
+        price: string | number;
+    }
+    interface CreatePassiveOfferOptions {
+        selling: Asset;
+        buying: Asset;
+        amount: string;
+        price: number | string | object;
+        source?: string;
+    }
+    function createPassiveOffer(options: CreatePassiveOfferOptions): xdr.Operation<CreatePassiveOffer>;
+
+    interface Inflation extends Operation {
+        type: OperationType.inflation;
+    }
+    function inflation(options: { source?: string }): xdr.Operation<Inflation>;
+
+    interface ManageData extends Operation {
+        type: OperationType.manageData;
+        name: string;
+        value: string;
+    }
+    interface ManageDataOptions {
+        name: string;
+        value: string | Buffer;
+        source?: string;
+    }
+    function manageData(options: ManageDataOptions): xdr.Operation<ManageData>;
+
+    interface ManageOffer extends Operation {
+        type: OperationType.manageOffer;
+        selling: Asset;
+        buying: Asset;
+        amount: string | number;
+        price: string | number;
+        offerId: string;
+    }
+    interface ManageOfferOptions extends CreatePassiveOfferOptions {
+        offerId: number | string;
+    }
+    function manageOffer(options: ManageOfferOptions): xdr.Operation<ManageOffer>;
+
+    interface PathPayment extends Operation {
+        type: OperationType.pathPayment;
+        sendAsset: Asset;
+        sendMax: string | number;
+        destination: string;
+        destAsset: Asset;
+        destAmount: string | number;
+        path: Asset[];
+    }
+    interface PathPaymentOptions {
+        sendAsset: Asset;
+        sendMax: string;
+        destination: string;
+        destAsset: Asset;
+        destAmount: string;
+        path: Asset[];
+        source?: string;
+    }
+    function pathPayment(options: PathPaymentOptions): xdr.Operation<PathPayment>;
+
+    interface Payment extends Operation {
+        type: OperationType.payment;
+        destination: string;
+        asset: Asset;
+        amount: string | number;
+    }
+    interface PaymentOptions {
+        destination: string;
+        asset: Asset;
+        amount: string;
+        source?: string;
+    }
+    function payment(options: PaymentOptions): xdr.Operation<Payment>;
+
+    /*
+     * Required = 1 << 0
+     * Revocable = 1 << 1
+     * Immutable = 1 << 2
+     */
+    enum AuthFlags {
+        Required = 1,
+        Revocable = 2,
+        Immutable = 4,
+    }
+    interface Signer {
+        ed25519PublicKey?: string;
+        sha256Hash?: Buffer | string;
+        preAuthTx?: Buffer | string;
+        weight?: number | string;
+    }
+    interface SetOptions extends Operation {
+        type: OperationType.setOptions;
+        inflationDest?: string;
+        clearFlags?: AuthFlags;
+        setFlags?: AuthFlags;
+        masterWeight?: number | string;
+        lowThreshold?: number | string;
+        medThreshold?: number | string;
+        highThreshold?: number | string;
+        homeDomain?: string;
+        signer?: Signer;
+    }
+    interface SetOptionsOptions {
+        inflationDest?: string;
+        clearFlags?: AuthFlags;
+        setFlags?: AuthFlags;
+        masterWeight?: number | string;
+        lowThreshold?: number | string;
+        medThreshold?: number | string;
+        highThreshold?: number | string;
+        signer?: Signer;
+        homeDomain?: string;
+        source?: string;
+    }
+    function setOptions(options: SetOptionsOptions): xdr.Operation<SetOptions>;
+
+    function fromXDRObject<T extends Operation>(xdrOperation: xdr.Operation<T>): T;
+}
+
+export class OperationCallBuilder extends CallBuilder<OperationRecord> { }
+export class OrderbookCallBuilder extends CallBuilder<OrderbookRecord> { }
+export class PathCallBuilder extends CallBuilder<PaymentPathRecord> { }
+export class PaymentCallBuilder extends CallBuilder<PaymentOperationRecord> { }
+
+export class Server {
+    constructor(serverURL: string, options?: { allowHttp: boolean })
+    accounts(): AccountCallBuilder;
+    assets(): AssetsCallBuilder;
+    effects(): EffectCallBuilder;
+    ledgers(): LedgerCallBuilder;
+    loadAccount(accountId: string): Promise<AccountResponse>;
+    offers(resource: string, ...parameters: string[]): OfferCallBuilder;
+    operations(): OperationCallBuilder;
+    orderbook(selling: Asset, buying: Asset): OrderbookCallBuilder;
+    paths(
+        source: string,
+        destination: string,
+        destinationAsset: Asset,
+        destinationAmount: string,
+    ): PathCallBuilder;
+    payments(): PaymentCallBuilder;
+    submitTransaction(transaction: Transaction): Promise<any>;
+    tradeAggregation(
+        base: Asset,
+        counter: Asset,
+        startTime: Date,
+        endTime: Date,
+        resolution: Date,
+    ): TradeAggregationCallBuilder;
+    trades(): TradesCallBuilder;
+    transactions(): TransactionCallBuilder;
+}
+
+export namespace StrKey {
+    function encodeEd25519PublicKey(data: Buffer): string;
+    function decodeEd25519PublicKey(data: string): Buffer;
+    function isValidEd25519PublicKey(Key: string): boolean;
+
+    function encodeEd25519SecretSeed(data: Buffer): string;
+    function decodeEd25519SecretSeed(data: string): Buffer;
+    function isValidEd25519SecretSeed(seed: string): boolean;
+
+    function encodePreAuthTx(data: Buffer): string;
+    function decodePreAuthTx(data: string): Buffer;
+
+    function encodeSha256Hash(data: Buffer): string;
+    function decodeSha256Hash(data: string): Buffer;
+}
+
+export class TradeAggregationCallBuilder extends CallBuilder<TradeAggregationRecord> { }
+export class TradesCallBuilder extends CallBuilder<TradeRecord> {
+    forAssetPair(base: Asset, counter: Asset): this;
+    forOffer(offerId: string): this;
+}
+
+export class Transaction {
+    constructor(envelope: string | xdr.TransactionEnvelope)
+    hash(): Buffer;
+    sign(...keypairs: Keypair[]): void;
+    signatureBase(): Buffer;
+    signHashX(preimage: Buffer | string): void;
+    toEnvelope(): xdr.TransactionEnvelope;
+
+    operations: TransactionOperation[];
+    sequence: number;
+    fee: number;
+    source: string;
+    memo: Memo;
+}
+
+export class TransactionBuilder {
+    constructor(sourceAccount: Account, options?: TransactionBuilder.TransactionBuilderOptions)
+    addOperation(operation: xdr.Operation<Operation.Operation>): this;
+    addMemo(memo: Memo): this;
+    build(): Transaction;
+}
+
+export namespace TransactionBuilder {
+    interface TransactionBuilderOptions {
+        fee?: number;
+        timebounds?: {
+            minTime?: number | string
+            maxTime?: number | string
+        };
+        memo?: Memo;
+    }
+}
+
+export class TransactionCallBuilder extends CallBuilder<TransactionRecord> {
+    transaction(transactionId: string): this;
+    forAccount(accountId: string): this;
+    forLedger(sequence: string | number): this;
+}
+
+export class Keypair {
+    static fromRawEd25519Seed(secretSeed: Buffer): Keypair;
+    static fromSecret(secretKey: string): Keypair;
+    static master(): Keypair;
+    static fromPublicKey(publicKey: string): Keypair;
+    static random(): Keypair;
+
+    constructor(keys: { type: 'ed25519', secretKey: string } | { type: 'ed25519', Key: string })
+
+    publicKey(): string;
+    secret(): string;
+    rawSecretKey(): Buffer;
+    canSign(): boolean;
+    sign(data: Buffer): Buffer;
+    verify(data: Buffer, signature: Buffer): boolean;
+}
+
+export namespace xdr {
+    class XDRStruct {
+        toXDR(): Buffer;
+    }
+    class Operation<T extends Operation.Operation> extends XDRStruct { }
+    class Asset extends XDRStruct { }
+    class Memo extends XDRStruct { }
+    class TransactionEnvelope extends XDRStruct { }
+}
diff --git a/types/stellar-sdk/stellar-sdk-tests.ts b/types/stellar-sdk/stellar-sdk-tests.ts
new file mode 100644
index 0000000000..4bd84ccc33
--- /dev/null
+++ b/types/stellar-sdk/stellar-sdk-tests.ts
@@ -0,0 +1,9 @@
+import * as StellarSdk from 'stellar-sdk';
+
+const sourceKey = StellarSdk.Keypair.random(); // $ExpectType Keypair
+const destKey = StellarSdk.Keypair.random();
+const account = new StellarSdk.Account(sourceKey.publicKey(), 1);
+const transaction = new StellarSdk.TransactionBuilder(account)
+    .addOperation(StellarSdk.Operation.accountMerge({destination: destKey.publicKey()}))
+    .build(); // $ExpectType () => Transaction
+transaction; // $ExpectType Transaction
diff --git a/types/stellar-sdk/tsconfig.json b/types/stellar-sdk/tsconfig.json
new file mode 100644
index 0000000000..12dfa57fa0
--- /dev/null
+++ b/types/stellar-sdk/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "stellar-sdk-tests.ts"
+    ]
+}
diff --git a/types/stellar-sdk/tslint.json b/types/stellar-sdk/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/stellar-sdk/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}