____tz_zs 2022-05-10 稿
随着2021 年 8 月的伦敦升级，eth链与bsc链等侧链有所区别。
eth链上，使用EIP-1559 标准，其gas策略需要当前正在打包的区块的数据baseFeePerGas，如下：
self.w3.eth.getBlock("pending").baseFeePerGas
而在bsc等侧链上，此函数将会报错：
{AttributeError}'AttributeDict' object has no attribute 'baseFeePerGas'
因为 bsc 链等侧链未进行升级，在其区块数据self.w3.eth.getBlock("pending")中缺少此baseFeePerGas字段，示例如下：
AttributeDict({‘difficulty’: 2, ‘proofOfAuthorityData’: HexBytes(‘0xd883010107846765746888676f312e31332e34856c696e7578000000c3167bdf11d15bd7acf524795030acdf1bcfe8bf1538e6e0b1250861665ad6152938dfeb126fbbc43a1fb30445a8cb4d39c52aff14476ebfd65cb5329560a0c7f5cdc9cc01’), ‘gasLimit’: 80000000, ‘gasUsed’: 17991604, ‘hash’: HexBytes(‘0x3f8939f7fb525374f7e64a8c3ca2fb57f66dce0eeb78b1fba8f3d90518731f8a’), ‘logsBloom’: HexBytes(‘0x3fa6a7dfe42a739617ed00f4f5003157eebfaee7cfaac5bbefa510727b3df3208b9b129b8347970c432b38943b8d044b58f39418ffea6c33a7575bac75e43acbadf43e7257e5f0e6433f95f976f7e3a6f534dbae7bee287fbb9f3316d56bbe6ddbf3fe6a529fe333025f1ac67212eb754f64f956df88bddd4663e93540b9c56f3f24bd3fd24e68ed41b555108c161c8725f5cfc5f922dfe8bb9b4f59eaa1f9fb9ffcd15474283a421cc6e1d30ef67a5b41bff081cd2ef6dfa70c197147f14f58007ae503cd2decdf4886538ba246b767f757f7aac86b751dba0d8eff2970ff5d3375773f2110478d3ba58613c40a133dd9325f1aefdae4cca669ffffb0cbbc07’), ‘miner’: ‘0x7AE2F5B9e386cd1B50A4550696D957cB4900f03a’, ‘mixHash’: HexBytes(‘0x0000000000000000000000000000000000000000000000000000000000000000’), ‘nonce’: HexBytes(‘0x0000000000000000’), ‘number’: 17676548, ‘parentHash’: HexBytes(‘0x0aa42aaa5db624f85697dcc67fa7383751e43e1acca560c78f8882b4c9ec7bfe’), ‘receiptsRoot’: HexBytes(‘0xd948e51b33a60866ec7875696de50084e1690786b77a80b0109d2aed52384fa1’), ‘sha3Uncles’: HexBytes(‘0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347’), ‘size’: 39254, ‘stateRoot’: HexBytes(‘0x51155cf29e4549279b9216c320c9109edd25ecceefa7e492c29d977bfc9f8b8a’), ‘timestamp’: 1652168053, ‘totalDifficulty’: 35139626, ‘transactions’: [HexBytes(‘0x0d44836e9a530bb6e7df006c00c3c9d025383f91318050f94c52f0300a5d3be6’), HexBytes(‘0xa0ff7407718bbd1939a0555122c072491b0b424955d6f5dad0da0870c5848e3e’), HexBytes(‘0x6e12a951a2347cefc84146159ded893e2117740a665f36f159717c1c3eb922fc’), HexBytes(‘0xd5f3907ce6fc7fc18853fe2e320787feb67244c45917e1fb04ff0fb109ccb5a3’), HexBytes(‘0x5960132b307e955b4ac412e73edb2e0fb881c1027738f81c285cc698bb84fa35’), HexBytes(‘0x2d32301eff0bfffe75b472917956f9b84d10a73e1b6a979542c37ab65badb4f4’), HexBytes(‘0x134c38f0870bb8bdb6b5082d23bc02e2570a754c66312e3d842d567ec44681a7’), HexBytes(‘0xd63e62f4e06d7f970cec244f2b05e6c5194d03af48bc7f9e14bcc863c2d6c30e’), HexBytes(‘0xf26ce83d941a77d95cff3560541d57833801c5af1b219fc3155e91f489f076d5’), HexBytes(‘0x32a722a4ff6dd80cd2dd5873a388d39a13808440c287165b57acf898be7c51e5’), HexBytes(‘0x7f785fdad30d9cba1a40be6a3621cca920421203642fe2ba2298a7ae245b17ab’), HexBytes(‘0xf6bc226b0a5ee517d6cab9aa40825b846f32c053ce91f4f3c38f2acfbfb247ad’), HexBytes(‘0xff8619badc93e304d8a42d5e0aceed8f400b5de52480d18424d1c7ddad45b12d’), HexBytes(‘0xfeb2d2228c11a6519820993dde143bc747600618df7c3ed2a6e253d321872a71’), HexBytes(‘0x292ff5543ec48354851bf882cbcc3ae4188eb12dc4d66b9e516544e9cdada083’), HexBytes(‘0x1244ae3844b57e5e6627697bc039a36c2ec9fb45420555916004fc6fbc759c0f’), 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HexBytes(‘0xbd9c0343c004c9165b07cdd141ae6791cbab6332f60952641353fd69dd437c57’), HexBytes(‘0x1a06d770d76db41747fd62dfa1948c78364aed6487b81f04a1243dd6bf98e48a’), HexBytes(‘0x7671b098a1bf3f85b49fb7eac533f8aa1c9a62e79b4f0d62f712d8e1a03ec0a0’), HexBytes(‘0x19b6aadc1200226603e59c81567514bedccc81056c3131624018b4936e85fc4c’), HexBytes(‘0xb54b799d0b51f21f8888bfb89f5446c8014dff4babd67852cccc2a0a48d8ecfd’), HexBytes(‘0x01a62c0bc4ae02860d5f0a2de27c1c917aad7d5905dd81cc5c752e866ddd15f5’), HexBytes(‘0x91d11bc5e25f381d99f17031879ad524b5298d6e4a6ab28ef690a1107926300b’), HexBytes(‘0xf5dd43a3e93a8b9a1494cceb0242620194ea0d0308449f28896a407432abf11a’), HexBytes(‘0x1d1edf8a8c7d9a982464fa4508efa72f97169131437bed7232310c4037cf3980’), HexBytes(‘0x7bb1c7046a374fce9a63708973c6eb37485f62248665c6b510780a83532fea2c’), HexBytes(‘0x237bb83183fb37973d2e51991476733b8737843d532c7c45b93a4affe3bbb36c’), HexBytes(‘0x743cba4c102423b4d6f45b69662e39c8ab15f06fee0e047d227115791f7acdf4’), 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HexBytes(‘0x0d1d5530939bb29218ba6569e7af9d88d56656ebc3dd427e790ef83dd906493a’), HexBytes(‘0x8d69333f1ac953f31e6341c9ff1eae0fcdce454220c2892eb21c075955b4ca38’), HexBytes(‘0xf1232f6f2928a72d20d228647f0576fa6829a7e807e8569a7de61c544ff21fba’), HexBytes(‘0xdc5f4ccb27f4b252a9fd47f6cf28432b9ae1d61ecd8fdea2670ea30891c0a23a’), HexBytes(‘0x58024b73d0abe9c74e1e2211b6f7963794c5f719669d84f1d4f6972cc3eb3b6f’), HexBytes(‘0xc4c281ef12ea7fcc71f46e852d9bd11fdb18c0df68c8ebb04572ee87c06e6f9a’), HexBytes(‘0x43757ae5ec9962e4f866881bd87720857f09881efc0e84ff595b4276bdf2f0c0’), HexBytes(‘0x38d0e2442312a9c3dbe576e25d57cbf3c21cf900a8a2f9392b37c596ec60fbd3’), HexBytes(‘0xa98591fcae90de81a0891338b0eebf1d73757071db307a14aa3eca679d0f0297’), HexBytes(‘0x4c7a2491ed41cceb6596570f74fd99f9f56d8425f33f00bd9bc07bc3f8be1c0c’), HexBytes(‘0x05b671739616f19dbbfc095c6a9b41e6853da3a85663bfee7e7a5feb011a5e75’), HexBytes(‘0x0dc533a387e8334ab307797e0c32bd0f3648faa2866808895e63a16800f67ecf’), 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