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web3.eth.alchemy.pas
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web3.eth.alchemy.pas
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{******************************************************************************}
{ }
{ Delphereum }
{ }
{ Copyright(c) 2020 Stefan van As <[email protected]> }
{ Github Repository <https://github.com/svanas/delphereum> }
{ }
{ Distributed under GNU AGPL v3.0 with Commons Clause }
{ }
{ This program is free software: you can redistribute it and/or modify }
{ it under the terms of the GNU Affero General Public License as published }
{ by the Free Software Foundation, either version 3 of the License, or }
{ (at your option) any later version. }
{ }
{ This program is distributed in the hope that it will be useful, }
{ but WITHOUT ANY WARRANTY; without even the implied warranty of }
{ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the }
{ GNU Affero General Public License for more details. }
{ }
{ You should have received a copy of the GNU Affero General Public License }
{ along with this program. If not, see <https://www.gnu.org/licenses/> }
{ }
{******************************************************************************}
unit web3.eth.alchemy;
{$I web3.inc}
interface
uses
// web3
web3;
type
TAlchemyApi = (core, nft);
function endpoint(const chain: TChain; const apiKey: string; const api: TAlchemyApi): IResult<string>; overload;
function endpoint(const chain: TChain; const protocol: TTransport; const apiKey: string; const api: TAlchemyApi): IResult<string>; overload;
implementation
uses
// Delphi
System.SysUtils;
function HTTPS(const chain: TChain; const apiKey: string; api: TAlchemyApi): IResult<string>;
const
path: array[TAlchemyApi] of string = ('', 'nft/');
begin
if chain = Ethereum then
Result := TResult<string>.Ok(Format('https://eth-mainnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = Sepolia then
Result := TResult<string>.Ok(Format('https://eth-sepolia.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = Holesky then
Result := TResult<string>.Ok(Format('https://eth-holesky.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = Optimism then
Result := TResult<string>.Ok(Format('https://opt-mainnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = OptimismSepolia then
Result := TResult<string>.Ok(Format('https://opt-sepolia.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = Polygon then
Result := TResult<string>.Ok(Format('https://polygon-mainnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = PolygonAmoy then
Result := TResult<string>.Ok(Format('https://polygon-amoy.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = Arbitrum then
Result := TResult<string>.Ok(Format('https://arb-mainnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = ArbitrumSepolia then
Result := TResult<string>.Ok(Format('https://arb-sepolia.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = Base then
Result := TResult<string>.Ok(Format('https://base-mainnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = BaseSepolia then
Result := TResult<string>.Ok(Format('https://base-sepolia.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = BNB then
Result := TResult<string>.Ok(Format('https://bnb-mainnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain = BNB_test_net then
Result := TResult<string>.Ok(Format('https://bnb-testnet.g.alchemy.com/%sv2/%s', [path[api], apiKey]))
else if chain.RPC[TTransport.HTTPS] <> '' then
Result := TResult<string>.Ok(chain.RPC[TTransport.HTTPS])
else
Result := TResult<string>.Err(TError.Create('%s not supported', [chain.Name]));
end;
function WebSocket(const chain: TChain; const apiKey: string): IResult<string>;
begin
if chain = Ethereum then
Result := TResult<string>.Ok(Format('wss://eth-mainnet.g.alchemy.com/v2/%s', [apiKey]))
else if chain = Sepolia then
Result := TResult<string>.Ok(Format('wss://eth-sepolia.g.alchemy.com/v2/%s', [apiKey]))
else if chain = Holesky then
Result := TResult<string>.Ok(Format('wss://eth-holesky.g.alchemy.com/v2/v2/%s', [apiKey]))
else if chain = Optimism then
Result := TResult<string>.Ok(Format('wss://opt-mainnet.g.alchemy.com/v2/%s', [apiKey]))
else if chain = OptimismSepolia then
Result := TResult<string>.Ok(Format('wss://opt-sepolia.g.alchemy.com/v2/%s', [apiKey]))
else if chain = Polygon then
Result := TResult<string>.Ok(Format('wss://polygon-mainnet.g.alchemy.com/v2/%s', [apiKey]))
else if chain = PolygonAmoy then
Result := TResult<string>.Ok(Format('wss://polygon-amoy.g.alchemy.com/v2/%s', [apiKey]))
else if chain = Arbitrum then
Result := TResult<string>.Ok(Format('wss://arb-mainnet.g.alchemy.com/v2/%s', [apiKey]))
else if chain = ArbitrumSepolia then
Result := TResult<string>.Ok(Format('wss://arb-sepolia.g.alchemy.com/v2/%s', [apiKey]))
else if chain = Base then
Result := TResult<string>.Ok(Format('wss://base-mainnet.g.alchemy.com/v2/%s', [apiKey]))
else if chain = BaseSepolia then
Result := TResult<string>.Ok(Format('wss://base-sepolia.g.alchemy.com/v2%s', [apiKey]))
else if chain.RPC[TTransport.WebSocket] <> '' then
Result := TResult<string>.Ok(chain.RPC[TTransport.WebSocket])
else
Result := TResult<string>.Err(TError.Create('%s not supported', [chain.Name]));
end;
function endpoint(const chain: TChain; const apiKey: string; const api: TAlchemyApi): IResult<string>;
begin
Result := endpoint(chain, TTransport.HTTPS, apiKey, api);
end;
function endpoint(const chain: TChain; const protocol: TTransport; const apiKey: string; const api: TAlchemyApi): IResult<string>;
begin
if protocol = TTransport.WebSocket then
Result := WebSocket(chain, apiKey)
else
Result := HTTPS(chain, apiKey, api);
end;
end.