75 lines
2.5 KiB
TypeScript
75 lines
2.5 KiB
TypeScript
"use strict"
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import { ethers } from "ethers";
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// @TODO: Keep a per-NonceManager pool of sent but unmined transactions for
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// rebroadcasting, in case we overrun the transaction pool
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export class NonceManager extends ethers.Signer {
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readonly signer: ethers.Signer;
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_initialPromise: Promise<number>;
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_deltaCount: number;
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constructor(signer: ethers.Signer) {
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super();
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this._deltaCount = 0;
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ethers.utils.defineReadOnly(this, "signer", signer);
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ethers.utils.defineReadOnly(this, "provider", signer.provider || null);
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}
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connect(provider: ethers.providers.Provider): NonceManager {
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return new NonceManager(this.signer.connect(provider));
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}
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getAddress(): Promise<string> {
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return this.signer.getAddress();
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}
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getTransactionCount(blockTag?: ethers.providers.BlockTag): Promise<number> {
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if (blockTag === "pending") {
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if (!this._initialPromise) {
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this._initialPromise = this.signer.getTransactionCount("pending");
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}
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const deltaCount = this._deltaCount;
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return this._initialPromise.then((initial) => (initial + deltaCount));
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}
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return this.signer.getTransactionCount(blockTag);
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}
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setTransactionCount(transactionCount: ethers.BigNumberish | Promise<ethers.BigNumberish>): void {
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this._initialPromise = Promise.resolve(transactionCount).then((nonce) => {
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return ethers.BigNumber.from(nonce).toNumber();
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});
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this._deltaCount = 0;
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}
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incrementTransactionCount(count?: number): void {
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this._deltaCount += ((count == null) ? 1: count);
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}
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signMessage(message: ethers.Bytes | string): Promise<string> {
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return this.signer.signMessage(message);;
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}
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signTransaction(transaction: ethers.utils.Deferrable<ethers.providers.TransactionRequest>): Promise<string> {
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return this.signer.signTransaction(transaction);
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}
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sendTransaction(transaction: ethers.utils.Deferrable<ethers.providers.TransactionRequest>): Promise<ethers.providers.TransactionResponse> {
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if (transaction.nonce == null) {
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transaction = ethers.utils.shallowCopy(transaction);
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transaction.nonce = this.getTransactionCount("pending");
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this.incrementTransactionCount();
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} else {
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this.setTransactionCount(transaction.nonce);
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this._deltaCount++;
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}
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return this.signer.sendTransaction(transaction).then((tx) => {
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return tx;
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});
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}
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}
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